Code Definition

P02E3 — Diesel Intake Air Flow Valve Circuit High

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

About P02E3

P02E3 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 P02E3 is stored, the module has detected a signal or supply voltage lower than the expected operating range; and a signal or supply voltage higher than the expected operating range.

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 P02E3 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

The engine control module (ECM) sets this code when it detects that the voltage in the diesel intake air flow valve circuit is higher than the expected range. This can indicate a short to power, an open circuit with high resistance, or a fault in the control circuit, which can prevent proper operation of the valve responsible for regulating intake airflow.

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