Powertrain
Definition only
Lights the check engine lamp
P2B71: Turbocharger/Supercharger A Temperature Sensor Range/Performance
Standardized SAE J2012 code · P2Bxx codes
What does P2B71 mean?
The ECM detects a range/performance fault on the turbocharger/supercharger a temperature sensor. 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
- Significant power loss / limp mode
- Possible blue or black smoke from exhaust
- Whistling or hissing sound from intake
Common causes
- High Sensor characteristic drifted
- Medium Sensor mounting displaced
- Low Sensor element aged beyond calibration window
Likelihood is a general estimate across vehicles; your make and model may differ.
Add your car to see reports of P2B71 on the same make and model first.
P2B71 in the community
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