P2B70 code meaning
Turbocharger/Supercharger A Temperature Sensor Circuit High
Powertrain system Generic code P2Bxx codes Check engine light
What P2B70 means
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.
P2B70 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modeNot expected
- Repair difficultyMedium
- Typical labor0.5 to 2 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P2B70
- Warning lamp with stored code
- Live data shows a fixed extreme value
Common causes of P2B70
- Most likelySignal or ground wire open, connector unplugged
- PossibleSignal wire shorted to the 5 V reference or another voltage
- PossibleSensor element open internally
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Turbocharger a temperature sensorWiring harnessECM
What each part of P2B70 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| B | Area: hybrid propulsion. |
| 70 | The exact fault in that area. |
What to do next
- Note P2B70 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P2B70
What does P2B70 mean?
P2B70 means "Turbocharger/Supercharger A Temperature Sensor Circuit High". P2B70 is set when sensor A on the turbocharger or supercharger delivers a signal above its valid range. It is a generic code, so it means the same on every make.
Is it safe to drive with P2B70?
Usually yes, for a short time, if the check engine light is steady and the car drives normally. If the light flashes or the car runs badly, stop and have it checked.
Will P2B70 fail an emissions test?
Yes, it can. P2B70 is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P2B70 to fix?
Difficulty: medium. A typical repair takes 0.5 to 2 hours of work. This is a job for a workshop.
Will P2B70 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.