P040C

Exhaust Gas Recirculation Temperature Sensor "A" Circuit Low

P040C is a generic OBD-II powertrain diagnostic trouble code: Exhaust Gas Recirculation Temperature Sensor "A" Circuit Low. It is logged by the engine control unit when the powertrain monitor detects that a specific fault threshold has been exceeded — typically resulting in the malfunction-indicator lamp (MIL / check-engine light) being illuminated.

Code
P040C
Group
Powertrain
System
Powertrain
Severity
Warning (MIL on)
Need P040C disabled?
RaceTune permanently disables any OBD-II trouble code on supported ECUs — for motorsport, off-road, and export use.
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Detailed reference content for P040C is being prepared. What you see above — the code's group, system, and the software disable option below — is accurate and complete; the long-form explainer, common causes, symptoms, and diagnostic steps will appear here once they have been reviewed.

Vehicles where we've handled P040C

Platforms in our catalogue with confirmed P040C coverage.

AUDI A4 20D
BMW 320D
2016
AUDI A6
2015
AUDI A6 30D
2015
AUDI A7
AUDI A7 30D

Related powertrain codes

Disabling P040C in software

RaceTune can permanently disable P040C — and any other OBD-II diagnostic trouble code — on every ECU family we support. The monitor is disabled inside the ECU itself, so the fault stops being logged: the warning light stays off and the engine never enters limp mode for this code. The change is tied to your exact software version.

Permanent
The monitor is disabled in the ECU itself — not just cleared. It cannot return.
Tailored to your file
Each patch is matched to your specific software version — never a one-size-fits-all file.
Reversible
The original file is always preserved. Reflash the stock to return the ECU to factory state.

ECUs with a P040C disable in our catalogue

Confirmed coverage from our recipe database — we support many more families. Upload your file and our identifier will match it automatically.

  • Bosch EDC17C50 verified 1 software version
  • Bosch EDC17C74 verified 1 software version
  • Bosch EDC17CP44 verified 1 software version

Software modifications affect emissions compliance and are not road-legal in many jurisdictions. RaceTune service files are intended for motorsport, off-road, and export use.

Got P040C in your scan?

Upload your ECU file — we'll identify the exact software version and confirm whether a disable is available for your car.

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