Code Definition

P012D — Turbocharger/ supercharger pressure sensor signal High

System: Powertrain  |  Type: Generic (OBD-II Standard)  |  Make: Generic

About P012D

P012D is a generic (obd-ii standard) powertrain diagnostic trouble code. It belongs to the P-prefix family of codes, which covers engine, transmission, emissions, or fuel-system faults.

When P012D is stored, the module has detected a signal or supply voltage higher than the expected operating range; and a sensor-related fault — the reported value from the named sensor is out of spec.

Scanning & clearing: A generic OBD-II scan tool will usually read and clear powertrain (P) codes. For live data, freeze-frame capture, and bi-directional tests you may need a more capable scan tool that supports the vehicle's ECM protocol.

Because P012D is a generic OBD-II code, its base definition is shared across manufacturers. The specific diagnostic steps, reference values, and repair procedures can vary by vehicle, and the TaT Diagnostic Assistant includes verified procedures submitted by working technicians.

Code Information

This fault code is set when the engine control module (ECM) detects a high signal condition in the circuit of the turbocharger or supercharger boost pressure sensor. A 'circuit high' status indicates that the voltage signal from the sensor is exceeding the normal operational range. This could be a result of a fault within the sensor itself, such as internal defects or damage, a short to power in the sensor's wiring, or a problem in the electrical connections. Additionally, it might indicate an actual high pressure condition in the turbocharger or supercharger system, which the sensor is accura...

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