Code Definition

P047D — Exhaust pressure sensor signal high sensor 2

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

About P047D

P047D 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 P047D 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 P047D 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 fault code P047D is triggered when the Engine Control Module (ECM) detects a high signal from the second exhaust pressure sensor. This indicates that the sensor is reporting a pressure value above the expected range. Such a high signal could point to issues within the exhaust system or with the sensor itself. The exhaust pressure sensor 2 is integral to the vehicle's ability to monitor exhaust back pressure, aiding in engine management, emission control, and diagnosing exhaust system problems.

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