U0423

Invalid Data Received From Instrument Panel Control Module

U0423 is a generic OBD-II network diagnostic trouble code: Invalid Data Received From Instrument Panel Control Module. It is logged by the engine control unit when the network monitor detects that a specific fault threshold has been exceeded — typically resulting in the malfunction-indicator lamp (MIL / check-engine light) being illuminated.

Code
U0423
Group
Network
System
Network
Severity
Warning (MIL on)
Need U0423 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 U0423 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 U0423

Platforms in our catalogue with confirmed U0423 coverage.

BMW 530XD
2017
BMW X5
2018–2019
AUDI A6
2018–2020
BMW X3
2018
MB VITO 20TD
BMW 5 SERIE
BMW 530XD 30D
BMW X3 20D
2018

Related network codes

Disabling U0423 in software

RaceTune can permanently disable U0423 — 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 U0423 on

We hold the DaVinci A2L disable definitions for these families, so the exact U0423 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 MD1CP001 verified
  • Bosch MD1CP002 verified
  • Bosch MD1CS001 verified
  • Bosch MD1CP004

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 U0423 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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