Powertrain
Definition only
Lights the check engine lamp
P2BB8: Engine Coolant Temperature Sensor 6 Circuit Low
Standardized SAE J2012 code · P2Bxx codes
What does P2BB8 mean?
The ECM detects a circuit low fault on the engine coolant temperature sensor 6. Reading cannot be used reliably for control.
The code tells you which monitor failed, not which part is broken. Test before replacing parts.
Symptoms
- Check engine light on
- Cooling fan runs constantly or not at all
- Cabin heater weak or excessively hot
- Possible long warm-up time or hard cold start
Common causes
- High Signal wire shorted to ground
- Medium Internal sensor short
- Low Connector pins corroded - high contact resistance
Likelihood is a general estimate across vehicles; your make and model may differ.
Add your car to see reports of P2BB8 on the same make and model first.
P2BB8 in the community
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