O2 SensorLow ImpactPetrol

P0141 — O2 Sensor Heater Circuit (Bank 1 Sensor 2)

Post-catalyst O2 sensor heater performance below threshold.

5+

Affected Brands

10+

ECU Platforms

2

Related Services

8

Related DTCs

Symptoms

What the driver typically experiences when P0141 is stored

!Check Engine Light
iNo drivability impact

Why does P0141 appear after tuning?

Common companion code to P0420 during catalyst modifications.

How proper calibration can address P0141

Included in WEREMAP catalyst-off calibration packages automatically.

Related Tuning Services

Relevant services for the system behind P0141

Catalyst OffDTC Off

Related Diagnostic Codes

Codes from the same diagnostic system as P0141

P0136Low Impact

O2 Sensor Circuit (Bank 1 Sensor 2)

P0420Moderate Impact

Catalyst System Efficiency Below Threshold (Bank 1)

P0161Moderate Impact

Diagnostic Trouble Code P0161

P0140Moderate Impact

Diagnostic Trouble Code P0140

P0138Moderate Impact

Diagnostic Trouble Code P0138

P0037Low Impact

HO2S Heater Control Circuit Low (Bank 1 Sensor 2)

P0430Moderate Impact

Catalyst System Efficiency Below Threshold (Bank 2)

P0036Low Impact

HO2S Heater Control Circuit (Bank 1 Sensor 2)

Affected ECU Platforms

Bosch MED17.2.2Bosch ME7.6.3Marelli IAW4AFBosch MG1CS201Bosch MG1CS019Bosch MG1CS002Keihin J754_113117Bosch MEVD17.2.GBosch MED17.1.62Bosch MG1CS015

Commonly Affected Vehicles

FiatPandaMarelli IAW4AF
BMW5 Serie - SedanBosch MG1CS201
FordMustangBosch MG1CS019
AudiS5Bosch MG1CS002
HondaCivicKeihin J754_113117
BMW3erBosch MEVD17.2.G
AudiRS3Bosch MED17.1.62

Based on data from 5+ vehicle brands. P0141 is not limited to these models.

Frequently Asked Questions

What does P0141 mean?â–¼
Post-catalyst O2 sensor heater performance below threshold.
Why does P0141 appear after ECU tuning?â–¼
Common companion code to P0420 during catalyst modifications.
How do you prevent P0141 during remapping?â–¼
Included in WEREMAP catalyst-off calibration packages automatically.
Which vehicles are affected by P0141?â–¼
P0141 is commonly found on Fiat, BMW, Ford, Audi, Honda vehicles equipped with Bosch MED17.2.2, Bosch ME7.6.3, Marelli IAW4AF, Bosch MG1CS201 ECU platforms.
What other codes appear alongside P0141?â–¼
P0141 frequently appears together with P0136, P0420, P0161, P0140, P0138. These related codes typically originate from the same system modification and should be addressed together in the calibration.

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