Fuel / Air MeteringModerate ImpactPetrol

P0031 — Diagnostic Trouble Code P0031

OBD-II diagnostic code P0031 relates to the fuel / air metering system. This code is logged when the ECU detects a parameter outside its expected operating range.

6+

Affected Brands

11+

ECU Platforms

2

Related Services

4

Related DTCs

Symptoms

What the driver typically experiences when P0031 is stored

!Check Engine Light
iPossible drivability issues
iAltered fuel consumption

Why does P0031 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 P0031

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 P0031

Catalyst OffDTC Off

Related Diagnostic Codes

Codes from the same diagnostic system as P0031

P0037Low Impact

HO2S Heater Control Circuit Low (Bank 1 Sensor 2)

P0030Low Impact

HO2S Heater Control Circuit (Bank 1 Sensor 1)

P0420Moderate Impact

Catalyst System Efficiency Below Threshold (Bank 1)

P0036Low Impact

HO2S Heater Control Circuit (Bank 1 Sensor 2)

Affected ECU Platforms

Mitsubishi e6t86871 hHeinzmann HitachiSiemens/Continental MSD81Denso 275992Siemens/Continental VDOMarelli xHitachi SH BEDXXunknown unknownDenso SH7058 MB279700Motorola/Cummins .Bosch ME7.8

Commonly Affected Vehicles

MitsubishiOutlanderMitsubishi e6t86871 h
NissanSERENA S-HYBRIDHeinzmann Hitachi
ToyotaAvensisDenso 275992
DucatiHypermotardSiemens/Continental VDO
SeatIbizaMarelli x
Nissan370ZHitachi SH BEDXX
Land RoverRange RoverDenso SH7058 MB279700

Based on data from 6+ vehicle brands. P0031 is not limited to these models.

Frequently Asked Questions

What does P0031 mean?â–¼
OBD-II diagnostic code P0031 relates to the fuel / air metering system. This code is logged when the ECU detects a parameter outside its expected operating range.
Why does P0031 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 P0031 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 P0031?â–¼
P0031 is commonly found on Mitsubishi, Nissan, Toyota, Ducati, Seat, Land Rover vehicles equipped with Mitsubishi e6t86871 h, Heinzmann Hitachi, Siemens/Continental MSD81, Denso 275992 ECU platforms.
What other codes appear alongside P0031?â–¼
P0031 frequently appears together with P0037, P0030, P0420, P0036. These related codes typically originate from the same system modification and should be addressed together in the calibration.

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