Code Definition

P3041 — Wrong engine coolant sensor signal on Controller Area Network

System: Powertrain  |  Type: Manufacturer-Specific  |  Make: Audi

About P3041

P3041 is a manufacturer-specific powertrain diagnostic trouble code recorded for Audi vehicles. It belongs to the P-prefix family of codes, which covers engine, transmission, emissions, or fuel-system faults.

When P3041 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.

P3041 is a manufacturer-specific code. The same code string on a different make may have a different meaning. Always confirm the code's definition against the vehicle's service information for the specific make and model under test.

Code Information

The engine control module (ECM) sets this code when it receives an incorrect or implausible engine coolant temperature (ECT) sensor signal via the Controller Area Network (CAN). This can occur due to a malfunctioning ECT sensor, wiring issues, or incorrect data being transmitted between control modules. An incorrect coolant temperature reading can affect engine performance, fuel injection, and emissions control.

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