P040B

Gas Recirculation Temperature Sensor A Circuit Range/Performance

P040B is a generic OBD-II powertrain diagnostic trouble code: Gas Recirculation Temperature Sensor A Circuit Range/Performance. It is logged by the engine control unit when the egr monitor detects that a specific fault threshold has been exceeded — typically resulting in the malfunction-indicator lamp (MIL / check-engine light) being illuminated.

Code
P040B
Group
Powertrain
System
EGR
Severity
Warning (MIL on)
Need P040B 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 P040B 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 P040B

Platforms in our catalogue with confirmed P040B coverage.

BMW 320D
2016

Related powertrain codes

Disabling P040B in software

RaceTune can permanently disable P040B — 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.

ECU families we can disable P040B on

We hold the DaVinci A2L disable definitions for these families, so the exact P040B path and mask addresses are mapped. verified marks a confirmed disable definition. We support many more — upload your file and our identifier will match it automatically.

  • Bosch EDC17C50 verified
  • Bosch EDC17C56 verified
  • Bosch EDC17C66 verified
  • Bosch EDC17C74 verified
  • Bosch EDC17CP44 verified
  • Bosch EDC17CP57 verified
  • Bosch MD1CP002 verified
  • Bosch MD1CP004 verified
  • Bosch MD1CS001 verified

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 P040B 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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