OBD-II code · Powertrain (generic)
P06AB Control Module Internal Temperature Sensor B Circuit
A general circuit fault on the ECU's internal temperature sensor B - the sensor that monitors module operating temperature for thermal protection.
Is it safe to drive with P06AB?
Usually safe for short trips, but don’t ignore it: the underlying fault can get more expensive over time.
Common causes
- Most likelyInternal sensor fault
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
- Hard
- DIY friendly
- Best left to a mechanic
- Typical labour
- 2–6 h
- Emissions test
- Usually unaffected
- Parts involved
- Ecu Internal Temperature Sensor B
Related codes
- P0666Control Module Internal Temperature Sensor A Circuit
- P06A8Sensor Reference Voltage C Circuit Range or Performance
- P06A9Sensor Reference Voltage D Circuit Range or Performance
- P06AAControl Module Internal Temperature B Too High
- P06ACControl Module Internal Temperature Sensor B Range or Performance
- P06ADControl Module Internal Temperature Sensor B Circuit Low
- P06AEControl Module Internal Temperature Sensor B Circuit High
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.