Code Definition

P012C — Turbocharger/ supercharger pressure sensor signal low

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

About P012C

P012C 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 P012C is stored, the module has detected a signal or supply voltage lower 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 P012C 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 indicates that the engine control module (ECM) has detected a low signal condition in the circuit of the turbocharger or supercharger boost pressure sensor. A 'circuit low' status typically implies that the voltage signal from the sensor is below the expected operational range. This could be due to a fault in the sensor itself, such as internal damage or malfunction, a short to ground in the sensor's wiring, or a problem with the electrical connections leading to the sensor. Additionally, it might reflect an actual low pressure condition in the turbocharger or supercharger syst...

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