Code Definition

P041C — EGR temperature signal low sensor 2

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

About P041C

P041C 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 P041C 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 P041C 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 P041C fault code is triggered when the Engine Control Module (ECM) detects a lower than expected signal from the Exhaust Gas Recirculation (EGR) temperature sensor 2. This low signal condition suggests a potential issue with the sensor or its circuit, indicating that the voltage from the sensor is below the normal operating range. The EGR temperature sensor 2 is important for measuring the temperature of exhaust gases in the EGR system, essential for effective emission control and maintaining engine efficiency. A low signal can impair the ECM's capacity to manage the EGR system accurately.

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