P2B70Turbocharger/Supercharger A Temperature Sensor Circuit High
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- How the car detects it
- P2B70 is set when sensor A on the turbocharger or supercharger delivers a signal above its valid range. For an NTC thermistor this corresponds to an implausibly cold reading, the classic result of an open signal or ground wire, an unplugged connector or a short to the 5 V reference; for a PTC-type element it would indicate extreme heat. No manufacturer publishes this code, so it remains open which point of the charging system the sensor watches. CARB 13 CCR 1968.2 (e)(15) has the fault stored apart from P2B6F and from the general circuit code P2B6E. The engine computer then usually works with a substitute value, and protective functions that rely on this temperature can only act in a limited way. Checking pin fit and continuity usually finds the cause.
- What you may notice
- Warning lamp with stored code
- Live data shows a fixed extreme value
- Likely causes
- LikelySignal or ground wire open, connector unplugged
- PossibleSignal wire shorted to the 5 V reference or another voltage
- PossibleSensor element open internally
- 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.