P068B
ECM/PCM Power Relay De-Energized Performance - Too Late
P068B is an OBD-II diagnostic trouble code meaning: ECM/PCM Power Relay De-Energized Performance - Too Late. Common causes: faulty ecu power relay (stuck when on), the ecu does not send a command to turn off the relay. Estimated repair cost: $6–44.
Symptoms
- Check Engine Light
- Slow battery drain when parked
- Increased current consumption after turning off the ignition
- Morning battery drain
- Security system malfunctions
Causes
- Faulty ECU power relay (stuck when on)
- The ECU does not send a command to turn off the relay
- Malfunction in the relay control circuit
- Wiring damage
- Internal ECU fault
How to Fix
- Read OBD-II codes and record all errors
- Measure current consumption after turning off the ignition
- Check the ECU power relay for stuck on state
- Check the relay control circuit and the control signal from the ECU
- Inspect the wiring and connectors
- If the malfunction is confirmed, replace the relay or ECU
Related codes
Error P068B by Vehicle Brand
FAQ
What does the P068B code mean?
P068B is an OBD-II diagnostic trouble code that indicates: ECM/PCM Power Relay De-Energized Performance - Too Late
What causes a P068B error code?
The most common causes of P068B include: Faulty ECU power relay (stuck when on); The ECU does not send a command to turn off the relay; Malfunction in the relay control circuit; Wiring damage.
How do I fix a P068B diagnostic trouble code?
To fix P068B: Read OBD-II codes and record all errors. Measure current consumption after turning off the ignition. Check the ECU power relay for stuck on state. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P068B?
Limited driving only, diagnose soon
How much does it cost to fix P068B?
The estimated repair cost for P068B is $6–44. Actual cost depends on your vehicle, location, and labor rates.
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