Code Definition

P046F — EGR position sensor signal intermittent sensor 2

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

About P046F

P046F 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 P046F 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 P046F 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 P046F is set when the Engine Control Module (ECM) detects an intermittent signal from the second Exhaust Gas Recirculation (EGR) position sensor. This diagnostic trouble code is triggered when the ECM receives a signal from the sensor that is erratic, inconsistent, or not within the expected range based on the EGR valve's commanded position. The EGR position sensor 2 plays a crucial role in providing feedback to the ECM about the actual position of the EGR valve, which is essential for controlling exhaust gas recirculation effectively.

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