Powertrain
Definition only
Lights the check engine lamp
P2BB6: Engine Coolant Temperature Sensor 6 Circuit
Standardized SAE J2012 code · P2Bxx codes
What does P2BB6 mean?
The ECM detects a circuit 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 Sensor failed
- Medium Wiring or connector fault
Likelihood is a general estimate across vehicles; your make and model may differ.
Add your car to see reports of P2BB6 on the same make and model first.
P2BB6 in the community
Ask about P2BB6No one has posted about P2BB6 yet
Share your vehicle, the tool you used and what you tested — the first thread helps everyone who searches for this code.
Describe your P2BB6 problem