The EOBD/OBDII error code P06DA indicates a potential issue within your vehicle’s oil pump control circuit. This fault code is triggered when the Powertrain Control Module (PCM) detects a malfunction in the electrical circuit that governs the oil pump solenoid. Addressing this promptly is crucial because a properly functioning oil pump is essential for maintaining optimal engine lubrication and preventing severe engine damage. This guide provides a systematic approach to diagnosing and resolving the P06DA error, ensuring your vehicle’s engine remains healthy and performs reliably.
Before proceeding, remember to consult your vehicle’s service manual for specific procedures and safety precautions related to your make and model.
Step-by-Step Diagnostic Guide for Error Code P06DA
This troubleshooting process is designed to methodically pinpoint the root cause of the P06DA error code. Follow each step carefully to ensure accurate diagnosis and effective repair.
Step 1: PCM Intermittent Condition Check
Begin by ruling out a potential intermittent issue with the PCM. Perform the PCM intermittent condition test as outlined in your vehicle’s service manual or a reliable online resource. This step helps to ensure that the error is not due to a temporary PCM glitch.
Refer to resources like for detailed instructions on performing a PCM intermittent condition check.
Step 2: Voltage Short Circuit Test of the Oil Pump Control Circuit
To check for a short to voltage in the oil pump control circuit, follow these steps:
- Turn off the ignition completely.
- Disconnect the Oil Pump Solenoid harness connector.
- Turn the ignition back on (without starting the engine).
- Using a multimeter, measure the voltage on the Oil Pump Solenoid control circuit at the Oil Pump solenoid harness connector.
Expected Result: Ideally, there should be no voltage present, except for a very brief moment immediately after turning the ignition on.
Is voltage present?
- YES: This indicates a short to voltage in the Oil Pump solenoid control circuit. Repair the circuit to eliminate the short.
- NO: Proceed to Step 3.
Step 3: Ground Short Circuit Test of the Oil Pump Solenoid Control Circuit
Next, test for a short to ground in the oil pump solenoid control circuit:
- Turn off the ignition.
- Disconnect the PCM C2 harness connector.
- Using a multimeter set to measure continuity, check for continuity between ground and the Oil Pump Solenoid control circuit at the oil pump solenoid harness connector.
Is there continuity?
- YES: A short to ground exists in the Oil Pump Solenoid control circuit. Repair the circuit to remove the short.
- NO: Continue to Step 4.
Step 4: Open Circuit/High Resistance Test of the Oil Pump Solenoid Control Circuit
This step assesses the integrity of the oil pump solenoid control circuit for open circuits or high resistance:
Caution: Avoid probing the PCM harness connector directly as it can damage the PCM terminals, leading to poor connections.
- Measure the resistance of the Oil Pump Solenoid control circuit between the oil pump solenoid harness connector.
Expected Result: The resistance should be below 3.0 ohms.
Is the resistance below 3.0 ohms?
- YES: Move on to Step 5.
- NO: Repair the Oil Pump Solenoid control circuit for an open or high resistance issue.
Step 5: Oil Pump Solenoid Ground Circuit Inspection
Verify the ground circuit of the oil pump solenoid:
- Measure the resistance between ground and the Oil Pump solenoid ground circuit at the Oil Pump solenoid harness connector.
Expected Result: The resistance should be below 3.0 ohms.
Is the resistance below 3.0 ohms?
- YES: Proceed to Step 6.
- NO: Repair the Oil Pump Solenoid ground control circuit for an open or high resistance fault.
Step 6: Oil Pump Solenoid Functionality Test
This step evaluates the operational capability of the oil pump solenoid itself:
- Reconnect the PCM C2 harness connector.
- Turn the ignition on.
- Connect a 12-volt test light to a reliable ground.
- Probe the Oil Pump Solenoid control circuit at the Oil Pump Solenoid harness connector with the test light.
Initial Observation: The test light should remain off, except for a brief illumination immediately after turning the ignition on.
- Using a scan tool, command the Oil Pump Solenoid control to the ON (100%) position.
Expected Result During Actuation: The test light should illuminate brightly, comparable to the brightness achieved with a direct connection to the battery.
Did the test light function as expected?
- YES: The Oil Pump Solenoid appears to be functioning electrically. Verify good pin-to-terminal contact in both the Oil Pump Solenoid and Powertrain Control Module connectors. If no connection issues are found, consider replacing the Oil Pump Solenoid as it may be internally faulty.
- NO: Proceed to Step 7.
Step 7: PCM and Component Connection Check
If the previous steps haven’t identified the problem, investigate related PCM and component connections. Inspect connectors, wiring harnesses, and grounds for any signs of corrosion, damage, or loose connections that could be contributing to the P06DA error.
Refer to resources like for guidance on checking PCM and component connections.
Conclusion
Diagnosing the EOBD/OBDII error code P06DA requires a methodical approach to pinpoint electrical faults within the oil pump control circuit. By following these steps, from initial circuit checks to component testing, you can systematically identify and rectify the issue. Remember to prioritize safety, consult vehicle-specific resources, and ensure accurate repairs to restore your vehicle’s engine management system to optimal condition. If you are unsure at any point, seeking assistance from a qualified automotive technician is always recommended.
