Emissions / AuxiliaryLow ImpactPetrol

P0431 — Diagnostic Trouble Code P0431

OBD-II diagnostic code P0431 relates to the emissions / auxiliary system. This code is logged when the ECU detects a parameter outside its expected operating range.

3+

Affected Brands

8+

ECU Platforms

1

Related Services

1

Related DTCs

Symptoms

What the driver typically experiences when P0431 is stored

!Check Engine Light
iFailed emissions test
iNo major drivability impact

Why does P0431 appear after tuning?

This code may appear after ECU modifications when the affected system monitoring has not been fully recalibrated for the new operating parameters.

How proper calibration can address P0431

WEREMAP professional calibrations include comprehensive diagnostic management for all affected systems, preventing unnecessary fault codes while maintaining safe operation.

Related Tuning Services

Relevant services for the system behind P0431

Catalyst Off

Related Diagnostic Codes

Codes from the same diagnostic system as P0431

P0421Low Impact

Diagnostic Trouble Code P0421

Affected ECU Platforms

Siemens/Continental SDI3Campi LIE 2018MPC5567 CAMPI_LIEBosch MED9.1Siemens/Continental sdi3Siemens/Continental SDI4Bosch me7Bosch ME7.1

Commonly Affected Vehicles

LamborghiniAventadorCampi LIE 2018
Lamborghini6.5L_ V12MPC5567 CAMPI_LIE
PorscheCayenneBosch MED9.1
PorscheCaymanSiemens/Continental sdi3
PorscheCayman SSiemens/Continental SDI3
PorscheBoxsterSiemens/Continental SDI3
AudiA6Bosch ME7.1

Based on data from 3+ vehicle brands. P0431 is not limited to these models.

Frequently Asked Questions

What does P0431 mean?â–¼
OBD-II diagnostic code P0431 relates to the emissions / auxiliary system. This code is logged when the ECU detects a parameter outside its expected operating range.
Why does P0431 appear after ECU tuning?â–¼
This code may appear after ECU modifications when the affected system monitoring has not been fully recalibrated for the new operating parameters.
How do you prevent P0431 during remapping?â–¼
WEREMAP professional calibrations include comprehensive diagnostic management for all affected systems, preventing unnecessary fault codes while maintaining safe operation.
Which vehicles are affected by P0431?â–¼
P0431 is commonly found on Lamborghini, Porsche, Audi vehicles equipped with Siemens/Continental SDI3, Campi LIE 2018, MPC5567 CAMPI_LIE, Bosch MED9.1 ECU platforms.
What other codes appear alongside P0431?â–¼
P0431 frequently appears together with P0421. These related codes typically originate from the same system modification and should be addressed together in the calibration.

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