OBD-II code · Powertrain (generic)
P068B ECM or PCM Power Relay De-Energized Performance Too Late
Same as P068A with the relay dropping out later than the calibrated window allows - keeps the ECU powered too long after key-off, drains the battery.
Is it safe to drive with P068B?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyRelay contact welded
Symptoms
- Check engine light on
- Possible limp mode or no-start
- Multiple follow-up faults across modules
- Reset/relearn may be needed after repair
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.5–1.8 h
- Emissions test
- Usually unaffected
- Parts involved
- Ecm Power Relay
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.