2004 Chevrolet Impala OBD2 Code P0841: Cooling Fan Relay 2 Control Circuit Malfunction
I'm experiencing OBD2 diagnostic code P0841 on my 2004 Chevrolet Impala, which indicates a malfunction in the cooling fan relay 2 control circuit. Both cooling fans are still operating normally—working properly at both low and high speeds. However, the vehicle is still throwing this error code. What could be causing this issue? Are there any known electrical or sensor-related causes for P0841 on this model?
This issue commonly occurs in 2004 Chevrolet Impala models. The P0841 code points to a problem with the cooling fan relay 2 control circuit, even if fans appear functional. Check for loose wiring or corrosion at the relay connector and ensure proper grounding. For detailed electrical schematics of the fan relay control system, refer to bbbind.com. Also verify that both low and high-speed fan operation are consistent. If the code persists despite normal fan function, consider inspecting the ECU communication or related sensors.