Fuel / Air MeteringModerate ImpactPetrol

P0139 — Diagnostic Trouble Code P0139

OBD-II diagnostic code P0139 relates to the fuel / air metering system. This code is logged when the ECU detects a parameter outside its expected operating range.

5+

Affected Brands

5+

ECU Platforms

2

Related Services

3

Related DTCs

Symptoms

What the driver typically experiences when P0139 is stored

!Check Engine Light
iRough running or hesitation
iAltered fuel mixture

Why does P0139 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 P0139

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 P0139

Catalyst OffDTC Off

Related Diagnostic Codes

Codes from the same diagnostic system as P0139

P0141Low Impact

O2 Sensor Heater Circuit (Bank 1 Sensor 2)

P0037Low Impact

HO2S Heater Control Circuit Low (Bank 1 Sensor 2)

P0140Moderate Impact

Diagnostic Trouble Code P0140

Affected ECU Platforms

Keihin J754_113117Siemens/Continental SIM2K-260Bosch MED17.9.8Bosch MED17.4.2Bosch ME7.7.0

Commonly Affected Vehicles

HondaCivicKeihin J754_113117
KiaStingerSiemens/Continental SIM2K-260
HyundaiVelosterBosch MED17.9.8
CitroenDS3Bosch MED17.4.2
SmartForTwoBosch ME7.7.0

Based on data from 5+ vehicle brands. P0139 is not limited to these models.

Frequently Asked Questions

What does P0139 mean?â–¼
OBD-II diagnostic code P0139 relates to the fuel / air metering system. This code is logged when the ECU detects a parameter outside its expected operating range.
Why does P0139 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 P0139 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 P0139?â–¼
P0139 is commonly found on Honda, Kia, Hyundai, Citroen, Smart vehicles equipped with Keihin J754_113117, Siemens/Continental SIM2K-260, Bosch MED17.9.8, Bosch MED17.4.2 ECU platforms.
What other codes appear alongside P0139?â–¼
P0139 frequently appears together with P0141, P0037, P0140. These related codes typically originate from the same system modification and should be addressed together in the calibration.

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