Are you experiencing frustration trying to clear trouble codes on your Chrysler Concorde using an OBDII scanner? It’s a common issue that many Chrysler owners face. You’ve plugged in your scanner, diagnosed the problem, potentially even fixed it, but that pesky check engine light remains on, and the codes just won’t clear. This guide will delve into the reasons why your OBDII scanner might be refusing to clear codes on your Chrysler Concorde and provide you with troubleshooting steps to resolve this issue.
Understanding OBDII Systems and Code Clearing
Before we dive into Chrysler Concorde specifics, let’s quickly recap how the OBDII (On-Board Diagnostics II) system works and the code clearing process. Your car’s computer, the Engine Control Module (ECM) or Powertrain Control Module (PCM), constantly monitors various sensors and systems. When it detects a fault, it illuminates the check engine light and stores Diagnostic Trouble Codes (DTCs) in its memory.
An OBDII scanner is your window into this system. It allows you to read these DTCs, understand the nature of the problem, and, crucially, clear these codes after the issue has been addressed. Clearing codes essentially tells the ECM to reset and turn off the check engine light, assuming the underlying problem is resolved.
Common Reasons Why Codes Won’t Clear on a Chrysler Concorde
Several reasons can prevent your OBDII scanner from clearing codes on your Chrysler Concorde. Here are some of the most frequent culprits:
1. The Fault is Still Present
This is the most common reason. OBDII systems are designed to be persistent. If the underlying problem that triggered the code is not actually fixed, the code will immediately reappear, and your scanner won’t be able to permanently clear it.
- Solution: Double-check your repair. Ensure you have accurately diagnosed and fixed the issue indicated by the trouble code. For example, if you had a code for a faulty oxygen sensor, simply replacing the sensor might not be enough. Wiring issues, vacuum leaks, or problems with related components can also trigger similar codes. Re-scan after your repair to see if the original code or any new codes are present.
2. Pending Codes (Continuous Monitors Not Ready)
OBDII systems have “continuous monitors” that constantly check critical emissions-related systems. After clearing codes or disconnecting the battery, these monitors need to run and complete their tests. If these monitors are not “ready,” you might see pending codes or the scanner might refuse to clear other codes.
- Solution: Drive your Chrysler Concorde through a drive cycle. This involves specific driving patterns (acceleration, deceleration, steady speeds) that allow the monitors to run their tests. Consult your Chrysler Concorde owner’s manual or online resources for the specific drive cycle procedure for your model year. After completing a drive cycle, re-attempt to clear the codes.
3. Scanner Compatibility Issues
While most OBDII scanners are universally compatible with OBDII compliant vehicles (including the Chrysler Concorde), there can be instances of incompatibility or limitations, especially with budget scanners. Some scanners might not have the robust software or communication protocols to effectively clear codes on all vehicle systems.
- Solution:
- Try a different scanner: If possible, test with a different OBDII scanner, preferably a more reputable brand or a professional-grade scan tool. Sometimes, a different scanner can communicate more effectively with your Concorde’s ECM.
- Ensure your scanner is updated: If you have a scanner that supports software updates, make sure it’s running the latest version. Updates often include improved vehicle coverage and bug fixes that can resolve code clearing issues.
4. Hard Codes vs. Soft Codes
Some diagnostic systems differentiate between “hard codes” and “soft codes.” Hard codes are current, active faults. Soft codes might be intermittent or historical faults. While most OBDII scanners treat all DTCs similarly for clearing purposes, in rare cases, a very persistent “hard code” might require more than just a simple code clear.
- Solution: Focus on addressing the underlying issue causing the code. If the code persists even after seemingly fixing the problem, delve deeper into diagnostics. Consult repair manuals, online forums specific to Chrysler Concorde, or consider seeking professional diagnostic help.
5. Electrical or Communication Problems
Issues within your Chrysler Concorde’s electrical system or the communication network (CAN bus) can sometimes interfere with the OBDII system’s ability to clear codes. This is less common but worth considering if other troubleshooting steps fail.
- Solution:
- Check for battery voltage issues: Low battery voltage or a failing battery can cause erratic electrical behavior. Ensure your battery is in good condition and properly charged.
- Inspect OBDII port: Examine the OBDII diagnostic port under your dashboard for any damage, corrosion, or loose pins. A faulty port can disrupt communication with the scanner.
- Look for wiring problems: While more complex, consider the possibility of wiring issues related to the ECM or OBDII system. This might require professional electrical diagnostics.
6. ECM/PCM Issues (Rare)
In very rare cases, a fault within the ECM/PCM itself could be the reason codes won’t clear. This is usually a last resort diagnosis after ruling out all other possibilities.
- Solution: ECM/PCM issues are complex and often require specialized diagnostic equipment and expertise. If you suspect an ECM/PCM problem, it’s best to consult a qualified automotive technician or a Chrysler dealership.
Choosing the Right OBDII Scanner for Your Chrysler Concorde
While basic OBDII scanners can read and clear generic codes, investing in a scanner with enhanced capabilities can be beneficial, especially for troubleshooting more complex issues or dealing with persistent codes on a Chrysler Concorde.
Consider scanners that offer:
- Chrysler-specific diagnostics: Some scanners offer enhanced diagnostic capabilities beyond generic OBDII codes, including access to Chrysler-specific systems and codes.
- Live data streaming: Viewing live sensor data can be invaluable for diagnosing intermittent problems or verifying repairs.
- Freeze frame data: This captures sensor readings at the moment a fault code was triggered, providing clues to the conditions surrounding the issue.
- Bi-directional controls: Advanced scanners might offer bi-directional control, allowing you to command certain vehicle functions for testing purposes.
While a basic Cen-Tech scanner might work for simple code reading on a Chrysler Concorde, for more in-depth diagnostics and reliable code clearing, especially when facing persistent issues, a more advanced scanner like an Autel AL619 or similar professional-grade tool might be a worthwhile investment.
Conclusion
Dealing with an OBDII scanner that won’t clear codes on your Chrysler Concorde can be frustrating. However, by systematically troubleshooting the common reasons outlined in this guide, you can increase your chances of resolving the issue. Remember to prioritize accurate diagnosis and repair of the underlying fault. If you continue to struggle, don’t hesitate to seek professional help from a qualified automotive technician to ensure your Chrysler Concorde is running smoothly and efficiently.
