Code Definition

P012E — Turbocharger/ supercharger pressure sensor signal intermittent

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

About P012E

P012E 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 P012E is stored, the module has detected 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 P012E 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 triggered when the engine control module (ECM) detects intermittent signal behaviour in the circuit of the turbocharger or supercharger boost pressure sensor. An intermittent signal condition implies that the sensor's output is sporadic, inconsistent, or loses connection intermittently. This could be due to issues like loose or corroded connections, intermittent shorts or opens in the sensor's wiring, or a failing sensor. It can also indicate intermittent problems within the turbocharger or supercharger system itself that affect the pressure readings intermittently.

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