Decoding OBDII Codes: Your Comprehensive Guide to Understanding Car Diagnostics for Chrysler and Jeep Vehicles

As a content creator for autelfrance.com and an automotive repair expert, I understand how crucial it is for car owners to grasp the basics of vehicle diagnostics. The dreaded check engine light illuminating on your dashboard can be unsettling, but understanding OBDII codes is the first step to resolving car issues efficiently. This guide will delve into the world of Obdii Codigos, or OBDII codes as they are known in English, specifically for Chrysler and Jeep vehicles. We aim to provide you with a more in-depth and SEO-optimized resource than the original article, empowering you with knowledge and helping you navigate potential car troubles.

Understanding OBDII and Diagnostic Trouble Codes

OBDII, or On-Board Diagnostics II, is a standardized system implemented in vehicles to monitor and diagnose various components and systems related to emissions and engine performance. When your vehicle detects a problem, it stores a Diagnostic Trouble Code (DTC), commonly referred to as an OBDII code. These codes are your car’s way of communicating what’s going wrong.

While this guide offers a comprehensive list of codes relevant to Chrysler and Jeep vehicles, it’s crucial to remember that this information is intended as a troubleshooting aid and not a definitive repair manual. Modern vehicle systems are complex, and accurate diagnosis often requires professional tools and expertise.

Important Disclaimers:

This list is extensive but may not be completely exhaustive. It is compiled from various sources and intended to be a helpful resource. Accuracy is aimed for, but not guaranteed. Consider this a work in progress. If you identify any significant omissions or inaccuracies, please let us know for correction.
Not all codes listed are specific to Jeeps but pertain to Chrysler vehicles generally.
Vehicle computers (ECUs) operate based on programming. They might miss existing problems, falsely indicate issues, or point to a symptom that is actually caused by a different underlying component. Professional code readers provide more precise information from the ECU than the basic methods described below. Therefore, this guide should be used to assist in troubleshooting and is NOT a repair manual.

Retrieving OBDII Codes: The “Key Trick” Methods

Before you can understand the meaning of obdii codigos, you need to know how to retrieve them from your Chrysler or Jeep vehicle. The method varies slightly depending on whether you have an older (OBDI) or newer (OBDII) model.

For Older (OBDI) Models: The Ignition Key Method

This method involves using your ignition key to trigger the check engine light to flash out the stored codes.

Start with the ignition OFF.
Within five seconds, cycle the ignition key between the “ON” and “OFF” positions three times, ending in the “ON” position. Remember, “ON” is not “Start,” and “OFF” is not “Lock.” The sequence is: ON, OFF, ON, OFF, ON.
Observe the “check engine” light. It will begin to flash. Count the flashes to decipher the two-digit codes.
Code Interpretation: Each code is represented by a two-digit sequence of flashes. For example, code 23 would be FLASH FLASH (pause) FLASH FLASH FLASH (long pause). Pay close attention to the pauses to distinguish between digits and separate codes. Codes will never flash more than 9 times for a single digit.
Code 55: A code 55 (FLASH FLASH FLASH FLASH FLASH – long pause – FLASH FLASH FLASH FLASH FLASH) indicates the “end of codes” and is a normal signal, not an error. On some older models, blink spacing might not be perfectly uniform. If you see a repeated sequence like 23 23, it’s likely just a single 55, as codes are not typically repeated.

For Newer (OBDII) Models: The Odometer Method

Newer models often display error codes directly on the digital odometer.

Insert the key into the ignition.
Push and hold down the odometer reset button.
While holding the button, turn the key to the “RUN” position. “RUN” is typically the position right before “Start.”
Release the odometer reset button.
Observe the Odometer Display: The odometer will cycle through a sequence of numbers, usually starting with “111111” and progressing to “999999.” It may then display the car’s serial number. After this sequence, it should display any stored error codes. Codes may be prefixed with a “P” (e.g., P1234).
Alternative Method: If the odometer method does not work, try the OBDI “key trick” method described above, as some newer models might still respond to it.

“Limp In” Mode

In severe failure scenarios, your vehicle’s computer might activate “Limp In” mode (also known as “limp mode” or “reduced power mode”). This is a safety feature that allows you to drive the car to a mechanic even with significant sensor or system failures. Limp mode compensates for sensor failures by estimating data, but it significantly reduces engine power and performance. A common symptom of limp mode in vehicles with automatic transmissions is the loss of third and/or fourth gear.

Older Model Computer Codes (OBDI) for Chrysler and Jeep

IMPORTANT! Code definitions can vary, especially for vehicles manufactured around 1996 onwards. This list is primarily for older models.

11: No ignition reference signal detected during cranking OR timing belt skipped one or more teeth; OR loss of either camshaft or crankshaft position sensor.
12: Battery or computer recently disconnected. This code often appears after battery replacement or disconnecting the ECU.
13: MAP sensor or vacuum line may not be working. Manifold Absolute Pressure (MAP) sensor issues can impact fuel mixture and engine performance.
14: MAP sensor voltage below .16V or over 4.96V. Indicates an electrical issue with the MAP sensor circuit.
15: No speed/distance sensor signal. Vehicle Speed Sensor (VSS) signal loss can affect speedometer, odometer, and transmission shifting.
16: Loss of battery voltage detected with engine running. Points to charging system problems or voltage drops.
17: Engine stays cool too long (bad thermostat or coolant sensor?) OR 17 (1985 turbo only): knock sensor circuit. Relates to engine temperature regulation or knock detection (turbo models).
21: Oxygen sensor signal doesn’t change (stays at 4.3-4.5V). Probably bad oxygen sensor. Indicates a faulty oxygen sensor, critical for air/fuel mixture monitoring.
22: Coolant sensor signal out of range – May have been disconnected to set timing. Coolant Temperature Sensor (CTS) signal issue.
23: Incoming air temperature sensor may be bad. Intake Air Temperature (IAT) sensor malfunction.
24: Throttle position sensor over 4.96V. Throttle Position Sensor (TPS) voltage too high.
25: Automatic Idle Speed (AIS) motor driver circuit shorted or target idle not reached. Idle control system problem.
26: Peak injector circuit voltage has not been reached (need to check computer signals, voltage reg, injectors). Fuel injector circuit voltage issue.
27: Injector circuit isn’t switching when it’s told to (TBI) OR (MPI) injector circuit #1 not switching right OR (turbo) injector circuit #2 not switching right OR (all 1990-) injector output driver not responding – check computer, connections. Fuel injector circuit switching problems.
31: Bad evaporator purge solenoid circuit or driver. Evaporative Emission (EVAP) purge solenoid circuit fault.
32 (1984 only): power loss/limited lamp or circuit OR 32 EGR gases not working (1988) – check vacuum, valve OR 32 (1990-92): computer didn’t see change in air/’fuel ratio when EGR activated – check valve, vacuum lines, and EGR electrical. Exhaust Gas Recirculation (EGR) system issues.
33: Air conditioning clutch relay circuit open or shorted (may be in the wide-open-throttle cutoff circuit or normal on early 80’s models if you don’t have air conditioning). Air Conditioning (A/C) clutch relay circuit problem.
34 (1984-86): EGR solenoid circuit shorted or open OR 34 (1987-1991): speed control shorted or open. EGR solenoid or speed control (cruise control) circuit issues.
35: Cooling fan relay circuit open or shorted OR 35 idle switch motor fault – check connections. Cooling fan relay or idle switch motor problems.
36 (turbo only): Wastegate control circuit open or shorted. Turbocharger wastegate control circuit fault.
37: Shift indicator light failure, 5-speed OR part throttle lock/unlock solenoid driver circuit (87-89) OR solenoid coil circuit (85-87 Turbo only) OR Trans temperature sensor voltage low (1995 and on). Transmission-related issues (shift indicator, solenoid, temperature sensor).
41: Alternator field control circuit open or shorted. Charging system – alternator field control circuit problem.
42: Automatic shutdown relay circuit open or shorted OR 42 Fuel pump relay control circuit OR 42 Fuel level unit – no change over miles OR 42 Z1 voltage missing when autoshutdown circuit energized (The Z1 voltage is the voltage of the circuits fed by the autoshutdown relay. This typically includes fuel pump and switched-battery feed to the ignition coil). Automatic Shutdown (ASD) relay circuit or fuel pump relay circuit issues.
43: Peak primary coil current not achieved with max dwell time OR 43 Cylinder misfire OR 43 Problem in power module to logic module interface. Ignition coil current, cylinder misfire, or module communication problems.
44: No FJ2 voltage present at logic board OR 44 Logic module self-diagnostics indicate problem OR 44 Battery temperature out of range. Logic module (ECU) or battery temperature issues.
45: Turbo boost limit exceeded (engine was shut down by logic module). Turbocharger overboost condition.
46: Battery voltage too high during charging or charging system voltage too low. Charging system voltage too high or low.
47: Battery voltage too low and alternator output too low. Low battery voltage and low alternator output.
51: Oxygen sensor stuck at lean position (this may be tripped by a bad MAP sensor system causing a rich condition. If you get hot rough idle and stalling, especially on deceleration, accompanied by flooded engine and difficulty restarting, that can be a bad MAP sensor causing the O2 sensor to try to compensate. If you get poor cold driveability, stumbling and bucking, and acceptable warm driving with poor gas mileage (a drop of 10 mpg or more), that is usually the O2 sensor. OR 51 Internal logic module fault (’84 turbo only). Oxygen sensor lean condition or internal logic module fault (older models).
52: Oxygen sensor stuck at rich position OR 52 Internal logic module fault (’84 turbo only). Oxygen sensor rich condition or internal logic module fault (older models).
53: Logic module internal problem. Internal ECU problem.
54: No sync pickup signal during engine rotation (turbo only) OR 54 Internal logic module fault (’84 turbo only) – or camshaft sensor/distributor timing. Sync signal issue (turbo) or logic module/timing problem.
55: End of codes. Normal “end of diagnostic trouble codes” signal.
61: “Baro” sensor open or shorted. Barometric pressure (BARO) sensor circuit fault.
62: EMR mileage cannot be stored in EEPROM OR 62 PCM failure SRI mile not stored. EEPROM or PCM (Powertrain Control Module) failure related to mileage storage.
63: Controller cannot write to EEPROM. EEPROM write error.
64: Catalytic converter efficiency failure. Catalytic converter efficiency below threshold.
65: Power steering switch failure. Power Steering Pressure (PSP) switch malfunction.
66: No CCD Message From TCM and/or No CCD Message From BCM. Communication error with Transmission Control Module (TCM) or Body Control Module (BCM) via CCD bus.

Newer Model Computer Codes (OBDII) for Chrysler and Jeep

These codes are the standardized OBDII codes and are generally applicable across many manufacturers, but this list is tailored for Chrysler and Jeep vehicles.

30: Sensor heater relay problem. Sensor heater relay circuit issue.
36: Sensor heater relay problem. (Likely a duplicate of code 30 or related heater relay issue).
106: MAP sensor voltage out of range detected at startup. MAP sensor voltage problem at engine start.
107: MAP sensor voltage too low. Low voltage from the MAP sensor.
108: MAP sensor voltage too high. High voltage from the MAP sensor.
112: Intake air temperature sensor voltage low. Low voltage from the Intake Air Temperature (IAT) sensor.
113: Intake air (charge) temperature sensor voltage high. High voltage from the IAT sensor.
116: Coolant temperature sensor reading doesn’t make sense. Implausible reading from the Coolant Temperature Sensor (CTS).
117: Engine coolant temperature sensor voltage low. Low voltage from the CTS.
118: Engine coolant temperature sensor voltage high. High voltage from the CTS.
121: Throttle position sensor and MAP sensor disagree with each other. Inconsistent readings between TPS and MAP sensors.
122: Throttle position sensor voltage low. Low voltage from the Throttle Position Sensor (TPS).
123: Throttle position sensor voltage high. High voltage from the TPS.
125: Taking too long to reach proper operating temperature and switch to energy-efficient mode. Engine not warming up quickly enough.
130: Sensor heater relay problem. (Likely related to code 30 and 36).
130: O2 Sensor Circuit Malfunction (Bank 1 Sensor 1). Oxygen sensor circuit malfunction (Bank 1, Sensor 1).
131: O2 Sensor Circuit Low Voltage (Bank 1 Sensor 1). Low voltage in the Bank 1, Sensor 1 oxygen sensor circuit.
132: O2 Sensor Circuit High Voltage (Bank 1 Sensor 1). High voltage in the Bank 1, Sensor 1 oxygen sensor circuit.
133: O2 Sensor Circuit Slow Response (Bank 1 Sensor 1). Slow response from the Bank 1, Sensor 1 oxygen sensor.
134: O2 Sensor Circuit No Activity Detected (Bank 1 Sensor 1). No signal activity from the Bank 1, Sensor 1 oxygen sensor.
135: O2 Sensor Heater Circuit Malfunction (Bank 1 Sensor 1). Oxygen sensor heater circuit malfunction (Bank 1, Sensor 1).
136 – 147: These codes follow the same pattern as 130-135 but for different Oxygen Sensors (Bank 1 Sensor 2, Bank 1 Sensor 3, etc.). Note: Bank 1 Sensor 2 is typically downstream of the catalytic converter, while Sensor 1 is upstream.
147: Oxygen sensor heater element not working properly (this device helps to reduce emissions more quickly). Oxygen sensor heater performance issue.
151: Oxygen sensor voltage problem – short circuit to ground? Oxygen sensor circuit short to ground.
152: Oxygen sensor voltage problem – short circuit to active 12V? Oxygen sensor circuit short to voltage.
153: Oxygen sensor response too slow. Slow response from the oxygen sensor.
154: Oxygen sensor does not show either a rich or lean condition – may need replacement. Oxygen sensor stuck or inactive.
155 – 161: Likely duplicates or variations related to oxygen sensor heater element issues (similar to 147).
171: The oxygen sensor is saying that the system air/fuel mix is far too lean (too much fuel is being added as a correction). System too lean (Bank 1).
172: The oxygen sensor is saying that the system air/fuel mix is far too rich (too much air is being added as a correction). System too rich (Bank 1).
174: The oxygen sensor is saying that the system air/fuel mix is far too lean (too much fuel is being added as a correction). System too lean (Bank 2).
175: The oxygen sensor is saying that the system air/fuel mix is far too rich (too much air is being added as a correction). System too rich (Bank 2).
176: Flex fuel sensor can’t be seen. Flex Fuel Sensor communication issue.
178: Flex fuel sensor problem. Flex Fuel Sensor malfunction.
179: Flex fuel sensor problem. (Likely a duplicate or related to 178).
182: Compressed natural gas temperature sensor problem. CNG temperature sensor fault.
183: Compressed natural gas temperature sensor problem. (Likely a duplicate or related to 182).
201 – 208: Injector #1 through #8 control circuit problem (open or shorted). Fuel injector circuit faults for individual cylinders.
300: Misfire detected in multiple cylinders. Random/Multiple Cylinder Misfire Detected.
301 – 308: Misfire detected in cylinder #1 through #8. Cylinder-specific misfire detection.
320: Crankshaft position sensor reference signal cannot be found while the engine is cranking. Crankshaft Position Sensor (CKP) signal missing during cranking.
325: Knock sensor (#1) signal is wrong. Knock Sensor 1 circuit malfunction.
330: Knock sensor (#2) signal is wrong. Knock Sensor 2 circuit malfunction.
340: No camshaft signal being received by the computer. Camshaft Position Sensor (CMP) signal missing.
350 – 358: Coil #1 through #8 is not reaching peak current at the right time OR A coil is drawing too much current. Ignition coil primary circuit performance or current issues for individual cylinders.
401: A required change in air/fuel mixture was not detected during diagnostic test. EGR flow insufficient detected during test.
403: An problem was detected in the EGR solenoid control circuit. EGR Solenoid Circuit Malfunction.
404: The EGR sensor’s reported position makes no sense. EGR Position Sensor Circuit Range/Performance.
405: EGR position sensor voltage wrong. EGR Position Sensor voltage low.
406: EGR position sensor voltage wrong. EGR Position Sensor voltage high.
412: The secondary air solenoid control circuit seems bad (this is used for the aspirator). Secondary Air Injection System Solenoid Circuit Malfunction.
420: The catalyst seems inefficient (#1). Catalyst System Efficiency Below Threshold (Bank 1).
432: The catalyst seems inefficient (#2). Catalyst System Efficiency Below Threshold (Bank 2).
441: Evaporative purge flow system not working properly. Evaporative Emission Control System Incorrect Purge Flow.
442: A leak has been detected in the evaporative system! Evaporative Emission Control System Leak Detected (Small Leak).
443: Evaporative purge flow system solenoid not working properly. Evaporative Emission Control System Purge Control Valve Circuit Malfunction.
455: A large leak has been detected in the evaporative system! Evaporative Emission Control System Leak Detected (Large Leak).
456: A small leak has been detected in the evaporative system! Evaporative Emission Control System Leak Detected (Very Small Leak).
460: The fuel level sender is not reporting any change over a long distance. Something seems wrong. Fuel Level Sensor Circuit Malfunction.
461: The fuel level sender is not reporting any change over a long time. Something seems wrong. Fuel Level Sensor Circuit Range/Performance.
462: Fuel level sender voltage wrong. Fuel Level Sensor Circuit Low Input.
463: Fuel level sender voltage wrong. Fuel Level Sensor Circuit High Input.
500: Haven’t heard from the speed sensor lately. Vehicle Speed Sensor (VSS) Circuit Malfunction.
505: The idle speed air control motor doesn’t seem to be working correctly. Idle Air Control (IAC) System Malfunction.
522: Oil pressure sensor problems. Oil Pressure Sensor/Switch Circuit Low Input.
523: Oil pressure sensor problems. Oil Pressure Sensor/Switch Circuit High Input.
551: The power steering switch may not be working. (Neons: high pressure is showing up at high speed). Power Steering Pressure (PSP) Switch Circuit Malfunction.
600: Oh-oh! The coprocessors aren’t talking to each other within the computer! CAN Communication Circuit Malfunction.
601: Internal computer error! Internal Control Module Memory Check Sum Error.
604: Internal computer error! (RAM check). Internal Control Module RAM Error.
605: Internal computer error! (ROM). Internal Control Module ROM Error.
615: Starter relay circuit problem. Starter Relay Circuit Malfunction.
622: Generator field control problem. Generator Field Control Circuit Malfunction.
645: A/C clutch relay circuit problem. A/C Clutch Relay Circuit Malfunction.
700: The automatic transmission computer or Aisin computer has a problem – ask it what’s going on. I don’t know. Transmission Control System Malfunction. Requires further diagnosis with transmission-specific scan tools.
703: Brake switch circuit information seems wrong. Brake Switch Circuit Malfunction.
711: Based on the transmission temperature and its operations, it looks like the transmission temperature sensor’s gone bad. Transmission Fluid Temperature Sensor Circuit Range/Performance.
712: Transmission fluid temperature sensor voltage wrong. Transmission Fluid Temperature Sensor Circuit Low Input.
713: Transmission fluid temperature sensor voltage wrong. Transmission Fluid Temperature Sensor Circuit High Input.
720: The Output Shaft Speed Sensor doesn’t match the reported vehicle speed. Output Shaft Speed Sensor Circuit Malfunction.
740: The engine’s running faster than it should for these speeds, so I think the torque converter clutch lock-up system is bad. Torque Converter Clutch Circuit Malfunction.
743: Torque converter clutch (part throttle unlock) solenoid circuit problem – shift solenoid C electrical fault. Torque Converter Clutch Circuit Electrical.
748: Governor Pressure Solenoid circuit problem (Transmission relay circuit problem in Jeep RE transmissions). Governor Pressure Control Solenoid Electrical.
751: Overdrive override switch has been pressed for over five minutes. Just thought you should know. Overdrive Switch Circuit Low. Informational code, not necessarily a fault.
753: Overdrive solenoid control circuit problem (transmission relay circuit in Jeep RE transmissions.). Overdrive Solenoid Circuit Electrical.
756: Shift solenoid B (2-3) fault. Shift Solenoid B Electrical.
783: The overdrive solenoid can’t go from 3rd gear to the overdrive gear. Transmission Overdrive Solenoid Circuit Malfunction.
801: Transmission reverse gear lockout solenoid circuit problem! Transmission Reverse Inhibit Solenoid Circuit Malfunction.
833: Problem with the clutch-released switch circuit? Clutch Pedal Switch Circuit Malfunction.
1192: Inlet air temperature sensor voltage is wrong. Intake Air Temperature Sensor Circuit Range/Performance.
1193: Inlet air temperature sensor voltage is wrong. Intake Air Temperature Sensor Circuit High Input.
1194: Oxygen sensor heater performance is faulty. Oxygen Sensor Heater Circuit Performance (Bank 1 Sensor 1).
1195: Oxygen sensor is slow. Oxygen Sensor Slow Response (Bank 1 Sensor 1).
1196: The oxygen sensor switched too slowly (bank 2). Oxygen Sensor Slow Response (Bank 1 Sensor 2).
1197: The oxygen sensor switched too slowly (bank 1). Oxygen Sensor Slow Response (Bank 2 Sensor 1). Note: Bank numbering might be reversed in the original text.
1198: Radiator coolant temperature sensor voltage is wrong. Engine Coolant Temperature Circuit Range/Performance.
1199: Radiator coolant temperature sensor voltage is wrong. Engine Coolant Temperature Circuit High Input.
1281: The engine is staying cold too long – check your thermostat. Coolant Thermostat (Coolant Temperature Below Thermostat Regulating Temperature).
1282: The fuel pump relay circuit seems to be having a problem. Fuel Pump Relay Circuit Malfunction.
1288: The intake manifold short runner tuning valve circuit seems to be having a problem. Intake Manifold Runner Control Circuit Malfunction.
1289: There’s a problem in the manifold tuning valve solenoid control circuit. Intake Manifold Runner Control Solenoid Circuit Malfunction.
1290: Compressed natural gas system pressure is too high. CNG Regulator Pressure Too High.
1291: The heated air intake sensor does not seem to be working. Heated Air Intake System Malfunction.
1292: Natural gas pressure sensor issue. CNG Pressure Sensor Circuit Low Input.
1293: Natural gas pressure sensor issue. CNG Pressure Sensor Circuit High Input.
1294: Can’t get to target engine speed, check for vacuum leaks and idle speed motor issues. Idle Speed Control System Malfunction.
1295: The throttle position sensor doesn’t seem to be getting enough electricity. Throttle Position Sensor Circuit Low Input.
1296: The MAP sensor doesn’t seem to be getting enough electricity. MAP Sensor Circuit Low Input.
1297: The MAP sensor doesn’t change its reading when the engine is running! MAP Sensor Stuck.
1298: During wide-open throttle, the engine runs lean. System Lean at Wide Open Throttle.
1299: MAP Sensor and Throttle Position Sensor signals don’t match, check for a vacuum leak. MAP/TPS Inconsistent at Idle.
1388: Auto shutdown relay circuit problems? Auto Shutdown Relay Control Circuit Malfunction.
1389: No Z1 or Z2 voltage seen by the computer when the auto shutdown relay is used. Auto Shutdown Relay Sense Circuit Malfunction.
1390: Cam and crank signals don’t match – did the timing belt skip a tooth? Camshaft/Crankshaft Timing Misalignment.
1391: Sometimes, I can’t see the crank or cam sensor signal. Intermittent Loss of Crankshaft Position Sensor Signal.
1398: I can see the Crank Sensor’s signal when I prepare for Misfire Diagnostics. Try replacing it. Crankshaft Position Sensor Noise.
1399: Problem in the Wait to Start Lamp circuit – (diesels only?). Wait to Start Lamp Circuit Malfunction.
1403: EGR position sensor not getting (enough) voltage. EGR Position Sensor Circuit Low Voltage.
1476: Too little secondary air injection during aspirator test. Secondary Air Injection System Low Flow.
1477: Too much secondary air injection during aspirator test. Secondary Air Injection System High Flow.
1478: Battery temperature sensor voltage wrong. Battery Temperature Sensor Circuit Range/Performance.
1479: Transmission fan relay circuit problems? Transmission Fan Relay Circuit Malfunction.
1480: PCV solenoid circuit problems? PCV Heater Control Circuit Malfunction.
1481: Transmission RPM pulse generator signal for misfire detection seems wrong. Misfire Detection Monitor RPM Input Circuit Malfunction.
1482: Catalyst temperature sensor circuit shorted low. Catalyst Temperature Sensor Circuit Low Input.
1483: Catalyst temperature sensor circuit shorted high. Catalyst Temperature Sensor Circuit High Input.
1484: The catalyst seems to be overheating! Catalyst Overtemperature Condition.
1485: Air injection solenoid circuit problems. Air Injection Solenoid Circuit Malfunction.
1486: Pinched or blocked hose in the evaporative hose system. Evaporative Emission Control System Leak (Vacuum Side).
1487: Control circuit of the #2 high-speed radiator fan control relay is having problems. Radiator Fan 2 Control Circuit Malfunction.
1488: Auxiliary 5-volt sensor feed is too low. 5 Volt Supply Output Too Low.
1489: High speed radiator fan control circuit problem. Radiator Fan Control Relay Circuit Malfunction.
1490: Low speed radiator fan control circuit problem. Radiator Fan Control Relay Circuit Low.
1491: Radiator fan control circuit problem (may be solid state relays as well as other circuits). Radiator Fan Control Relay Circuit High.
1492: Ambient or battery temperature sensor voltage wrong. Ambient Air Temperature Sensor Circuit Range/Performance.
1493: Ambient or battery temperature sensor voltage wrong. Ambient Air Temperature Sensor Circuit High Input.
1494: Leak Detection Pump (LDP) pressure switch problem – electrical or the pump itself. Leak Detection Pump Switch or Mechanical Fault.
1495: Leak Detection Pump (LDP) pressure switch problem – the solenoid circuit. Leak Detection Pump Solenoid Circuit Malfunction.
1496: Sensor feed is below an acceptable limit. (under 4v for 4 seconds – should be 5v). 5 Volt Supply Output Too Low. (Likely duplicate of 1488)
1498: High speed radiator fan control circuit problem. (#3 control relay) Radiator Fan 3 Control Circuit Malfunction.
1594: Voltage too high in charging system. Charging System Voltage Too High.
1595: Speed control vacuum or vent solenoid control circuits shorted or lost. Speed Control Vacuum Solenoid Circuit Malfunction.
1596: Speed control switch always high. Cruise Control Switch Always High.
1597: Speed control switch always low. Cruise Control Switch Always Low.
1598: A/C pressure sensor voltage high. A/C Pressure Sensor Circuit High Input.
1599: A/C pressure sensor voltage low. A/C Pressure Sensor Circuit Low Input.
1681: No messages received from the cluster control module (dashboard computer). No Communication With Instrument Panel Cluster (IPC) Control Module.
1682: Charging system doesn’t seem to be working well. Check alternator, etc. Charging System Voltage Low.
1683: Speed control servo power control circuit problem. Speed Control Servo Power Circuit Malfunction.
1684: The battery has been disconnected within the last 50 starts. Battery Disconnected Within Last 50 Starts. Informational code, not necessarily a fault.
1685: Invalid key received from the Smart Key Immobilizer Module. Invalid Key – SKIM system.
1686: No messages received from the Smart Key Immobilizer Module. No Communication With SKIM.
1687: No messages received from the Mechanical Instrument Cluster module. No Communication With Mechanical Instrument Cluster.
1693: The companion engine control module has shown a fault. Companion Engine Control Module Fault Present.
1694: No messages received from the powertrain control module-Aisin transmission. No Communication With TCM (Aisin Transmission).
1695: No messages received from the body control module. No Communication With BCM.
1696: Unsuccessful attempt to write to an EEPROM location! EEPROM Write Denied/Error.
1697: Unsuccessful attempt to update Service Reminder Indicator (SRI or EMR) mileage! SRI (Service Reminder Indicator) Mileage Not Stored.
1698: No messages received from the electronic transmission control module or the Aisin transmission controller. No Communication With Transmission Control Module (TCM).
1719: Transmission 2-3 gear lockout solenoid control circuit problem. 2-3 Shift Solenoid Circuit Malfunction.
1740: Either the tcc solenoid or overdrive solenoid systems doesn’t seem to be making much sense. Torque Converter Clutch/Overdrive Solenoid Performance.
1756: Transmission control pressure not equal to target. (Mid pressure problem). Governor Pressure Not Equal To Target Pressure (Medium Leak).
1757: Transmission control pressure not equal to target. (Zero pressure problem). Governor Pressure Not Equal To Target Pressure (Zero Leak).
1762: The Governor Pressure Sensor input was too high or too low for 3 consecutive park/neutral calibrations. Governor Pressure Sensor Voltage Too Low or High.
1763: The Governor Pressure Sensor input is too high. Governor Pressure Sensor Voltage Too High.
1764: The Governor Pressure Sensor input is too low. Governor Pressure Sensor Voltage Too Low.
1765: Open or short in the Transmission Relay control circuit. Transmission Relay Circuit Open or Short To Ground.
1899: The Park/Neutral switch seems to be stuck! Park/Neutral Switch Stuck In Park or Drive.

Conclusion: Using OBDII Codes for Preliminary Diagnosis

Understanding obdii codigos (OBDII codes) is a valuable skill for any Chrysler or Jeep owner. By using the methods outlined above to retrieve these codes and consulting this comprehensive list, you can gain a preliminary understanding of potential issues affecting your vehicle.

However, it is vital to reiterate that this guide is intended for informational purposes and initial troubleshooting. While OBDII codes provide a starting point, accurate diagnosis and repair often necessitate professional-grade diagnostic tools and the expertise of a qualified mechanic.

If you encounter a check engine light and retrieve an OBDII code, consider the following steps:

Consult this guide: Look up the code and understand its potential meaning.
Perform basic checks: For example, if the code indicates a MAP sensor issue, check vacuum lines for leaks. If it’s an oxygen sensor code, visually inspect the sensor and wiring.
Avoid guesswork repairs: Do not replace parts solely based on the code without further investigation. The code indicates a system or circuit problem, not necessarily a specific faulty component.
Seek professional diagnosis: For complex issues or if you are unsure how to proceed, take your vehicle to a certified mechanic or dealership. They have advanced diagnostic equipment and expertise to pinpoint the root cause of the problem and perform accurate repairs.

At autelfrance.com, we are dedicated to providing you with the knowledge and resources to maintain your vehicle effectively. While understanding OBDII codes is a great starting point, remember that professional diagnosis is often the key to resolving automotive issues correctly and ensuring the longevity and performance of your Chrysler or Jeep.