Turbocharger/Supercharger Inlet Pressure Sensor A Circuit High

Where it lives

For P012D, the sensor sits on the circuit this code reports. The description of P012D reports a fault at the sensor.

Check these first

• A short to voltage on the sensor A signal wire
• A failed turbocharger inlet pressure sensor A
• A stuck wastegate or VNT mechanism
• Boost overpressure
• A faulty ECM input for sensor A

What to do next

1. Compare the sensor A reading to actual boost
2. Test the signal wire for a short to voltage
3. Check the wastegate or VNT operation
4. Replace turbocharger inlet pressure sensor A
5. Verify the ECM if the reading stays high
6. Clear the code and retest

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