O2 SensorLow ImpactPetrol

P0030 — HO2S Heater Control Circuit (Bank 1 Sensor 1)

The pre-catalyst O2 sensor heater circuit on bank 1 has detected a fault.

4+

Affected Brands

7+

ECU Platforms

2

Related Services

7

Related DTCs

Symptoms

What the driver typically experiences when P0030 is stored

!Check Engine Light
iExtended warm-up lambda deviation

Why does P0030 appear after tuning?

Can appear when catalyst or lambda-related parameters are modified.

How proper calibration can address P0030

WEREMAP calibrations include proper O2 heater management across all banks.

Related Tuning Services

Relevant services for the system behind P0030

Catalyst OffDTC Off

Related Diagnostic Codes

Codes from the same diagnostic system as P0030

P0134Moderate Impact

Diagnostic Trouble Code P0134

P0130Moderate Impact

Diagnostic Trouble Code P0130

P0133Moderate Impact

Diagnostic Trouble Code P0133

P0036Low Impact

HO2S Heater Control Circuit (Bank 1 Sensor 2)

P0132Moderate Impact

Diagnostic Trouble Code P0132

P0135Moderate Impact

O2 Sensor Heater Circuit (Bank 1 Sensor 1)

P0031Moderate Impact

Diagnostic Trouble Code P0031

Affected ECU Platforms

Bosch MEVD17.2.3Bosch MED9.1Bosch ME7.8Bosch MG1CS201Siemens/Continental SIMOS8.5Siemens/Continental SIMOS18Bosch MED17.7

Commonly Affected Vehicles

Mini3-doorBosch MG1CS201
BMW1 Serie - 5drsBosch MEVD17.2.3
AudiS5Siemens/Continental SIMOS8.5
VWJetta / LamandoSiemens/Continental SIMOS18

Based on data from 4+ vehicle brands. P0030 is not limited to these models.

Frequently Asked Questions

What does P0030 mean?â–¼
The pre-catalyst O2 sensor heater circuit on bank 1 has detected a fault.
Why does P0030 appear after ECU tuning?â–¼
Can appear when catalyst or lambda-related parameters are modified.
How do you prevent P0030 during remapping?â–¼
WEREMAP calibrations include proper O2 heater management across all banks.
Which vehicles are affected by P0030?â–¼
P0030 is commonly found on Mini, BMW, Audi, VW vehicles equipped with Bosch MEVD17.2.3, Bosch MED9.1, Bosch ME7.8, Bosch MG1CS201 ECU platforms.
What other codes appear alongside P0030?â–¼
P0030 frequently appears together with P0134, P0130, P0133, P0036, P0132. These related codes typically originate from the same system modification and should be addressed together in the calibration.

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