O2 SensorLow ImpactPetrol

P0037 — HO2S Heater Control Circuit Low (Bank 1 Sensor 2)

Low voltage detected in the post-catalyst O2 sensor heater circuit.

6+

Affected Brands

12+

ECU Platforms

2

Related Services

8

Related DTCs

Symptoms

What the driver typically experiences when P0037 is stored

!Check Engine Light
iSlow sensor response when cold

Why does P0037 appear after tuning?

Related to post-catalyst sensor recalibration during exhaust modifications.

How proper calibration can address P0037

WEREMAP files include proper O2 sensor heater circuit thresholds for the specific ECU platform.

Related Tuning Services

Relevant services for the system behind P0037

Catalyst OffDTC Off

Related Diagnostic Codes

Codes from the same diagnostic system as P0037

P0036Low Impact

HO2S Heater Control Circuit (Bank 1 Sensor 2)

P0420Moderate Impact

Catalyst System Efficiency Below Threshold (Bank 1)

P0136Low Impact

O2 Sensor Circuit (Bank 1 Sensor 2)

P0137Moderate Impact

Diagnostic Trouble Code P0137

P0138Moderate Impact

Diagnostic Trouble Code P0138

P0430Moderate Impact

Catalyst System Efficiency Below Threshold (Bank 2)

P0038Moderate Impact

Diagnostic Trouble Code P0038

P0057Moderate Impact

Diagnostic Trouble Code P0057

Affected ECU Platforms

Siemens/Continental SIMOS18Bosch MG1CS201Bosch MED17.1.27Bosch MEVD17.2.GSiemens/Continental SIM2K-260Bosch MG1CS003Hitachi BED431-xxxBosch ME17.8.33Bosch MED17.7.3.1Bosch MED17.1.1Valeo V46.1Bosch MED17.5.4

Commonly Affected Vehicles

BMW5 Serie - SedanBosch MG1CS201
SeatAronaBosch MED17.1.27
VWGolfSiemens/Continental SIMOS18
BMW3erBosch MEVD17.2.G
KiaStingerSiemens/Continental SIM2K-260
BMW4 Serie - CoupeBosch MG1CS003
NissanSentraHitachi BED431-xxx
McLarenSuper SeriesBosch ME17.8.33

Based on data from 6+ vehicle brands. P0037 is not limited to these models.

Frequently Asked Questions

What does P0037 mean?â–¼
Low voltage detected in the post-catalyst O2 sensor heater circuit.
Why does P0037 appear after ECU tuning?â–¼
Related to post-catalyst sensor recalibration during exhaust modifications.
How do you prevent P0037 during remapping?â–¼
WEREMAP files include proper O2 sensor heater circuit thresholds for the specific ECU platform.
Which vehicles are affected by P0037?â–¼
P0037 is commonly found on BMW, Seat, VW, Kia, Nissan, McLaren vehicles equipped with Siemens/Continental SIMOS18, Bosch MG1CS201, Bosch MED17.1.27, Bosch MEVD17.2.G ECU platforms.
What other codes appear alongside P0037?â–¼
P0037 frequently appears together with P0036, P0420, P0136, P0137, P0138. These related codes typically originate from the same system modification and should be addressed together in the calibration.

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