OBD-II code · Powertrain (generic, extended)
P262B Control Module Power Off Timer Performance
The internal power-down timer of the engine controller does not run as expected. The module either stays awake too long after key-off (battery drain) or shuts down too early (no aftertreatment cool-down or learn-write).
Is it safe to drive with P262B?
Usually safe for short trips, but don’t ignore it: the underlying fault can get more expensive over time.
Common causes
- PossibleIntermittent main relay opens early
- PossibleSoftware timer counter corrupted
Repair at a glance
- Difficulty
- Hard
- DIY friendly
- Best left to a mechanic
- Typical labour
- 1–4 h
- Emissions test
- Usually unaffected
- Parts involved
- Control Module, Main Relay
Related codes
- P2628O2 Sensor Pumping Current Trim Circuit High Bank 1 Sensor 1
- P2629O2 Sensor Pumping Current Trim Circuit / Open Bank 2 Sensor 1
- P262AFuel Injector - Pilot Injection Not Learned
- P262CSensor Reference Voltage G Circuit / Open
- P262DSensor Reference Voltage G Circuit Low
- P262ESensor Reference Voltage G Circuit High
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.