Code Definition

P0472 — Exhaust Pressure Sensor Low

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

About P0472

P0472 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 P0472 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 P0472 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 code is triggered when the powertrain control module (PCM) detects that the exhaust back pressure (EBP) sensor is providing a voltage signal lower than the expected range. This typically indicates a short to ground, an open circuit, or a sensor failure, which can affect turbocharger operation, exhaust gas recirculation (EGR), and emissions control, especially in diesel engines.

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