P2B6FTurbocharger/Supercharger A Temperature Sensor Circuit Low
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- How the car detects it
- P2B6F reports that the signal of turbocharger/supercharger temperature sensor A has fallen below its valid range. If the sensor is an NTC thermistor, whose resistance drops as it warms, a low voltage stands for a very high temperature, so the usual electrical causes are a signal wire shorted to ground or a sensor failed internally short. With an element whose resistance rises with heat (PTC) the relationship is reversed, and low means very cold. Because no manufacturer documents this code publicly, the sensor type depends on the application. Per CARB 13 CCR 1968.2 (e)(15), low and high out-of-range faults get separate codes. On a cold engine compare the displayed value with real conditions: a hot reading at rest points to a short. High reading: P2B70.
- What you may notice
- Warning lamp with stored code
- Live data shows an extreme value even with the engine cold
- Likely causes
- LikelySignal wire shorted to ground, for example chafed near the exhaust
- PossibleSensor element shorted internally
- RareInput circuit in the engine computer faulty
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Usually a job for a workshop.Typical cost: €60 – €400
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.