Catalyst / ExhaustModerate ImpactPetrol

P0430 — Catalyst System Efficiency Below Threshold (Bank 2)

Same as P0420 but for the second cylinder bank. Applies to V6, V8, and flat/boxer engines with dual exhaust banks.

6+

Affected Brands

12+

ECU Platforms

3

Related Services

5

Related DTCs

Symptoms

What the driver typically experiences when P0430 is stored

!Check Engine Light (MIL)
iTypically appears alongside P0420 on V-engines
iNo drivability impact

Why does P0430 appear after tuning?

Triggered on V-configuration engines when both banks have modified exhaust components. Requires calibration of both bank monitoring systems.

How proper calibration can address P0430

WEREMAP calibrates both bank catalyst monitoring parameters simultaneously, ensuring consistent operation across the full RPM range.

Related Tuning Services

Relevant services for the system behind P0430

Catalyst OffDecatDTC Off

Related Diagnostic Codes

Codes from the same diagnostic system as P0430

P0420Moderate Impact

Catalyst System Efficiency Below Threshold (Bank 1)

P0036Low Impact

HO2S Heater Control Circuit (Bank 1 Sensor 2)

P0137Moderate Impact

Diagnostic Trouble Code P0137

P0037Low Impact

HO2S Heater Control Circuit Low (Bank 1 Sensor 2)

P0141Low Impact

O2 Sensor Heater Circuit (Bank 1 Sensor 2)

Affected ECU Platforms

Bosch MG1CS019Bosch MED17.7.5Bosch ME9.2Bosch MG1CS036Delco E92Siemens/Continental SIMOS8.5Bosch MED17.7.3Hitachi SH7059Bosch ME7.1.1Bosch MG1CS201Bosch MG1CS008Continental GPEC4

Commonly Affected Vehicles

FordRanger RaptorBosch MG1CS036
FordMustangBosch MG1CS019
BMW5 Serie - SedanBosch MG1CS201
LamborghiniUrusBosch MG1CS008
MBE / E CoupeBosch MED17.7.5
ChevroletCamaroDelco E92
JeepWranglerContinental GPEC4
FordF150Bosch MG1CS019

Based on data from 6+ vehicle brands. P0430 is not limited to these models.

Frequently Asked Questions

What does P0430 mean?â–¼
Same as P0420 but for the second cylinder bank. Applies to V6, V8, and flat/boxer engines with dual exhaust banks.
Why does P0430 appear after ECU tuning?â–¼
Triggered on V-configuration engines when both banks have modified exhaust components. Requires calibration of both bank monitoring systems.
How do you prevent P0430 during remapping?â–¼
WEREMAP calibrates both bank catalyst monitoring parameters simultaneously, ensuring consistent operation across the full RPM range.
Which vehicles are affected by P0430?â–¼
P0430 is commonly found on Ford, BMW, Lamborghini, MB, Chevrolet, Jeep vehicles equipped with Bosch MG1CS019, Bosch MED17.7.5, Bosch ME9.2, Bosch MG1CS036 ECU platforms.
What other codes appear alongside P0430?â–¼
P0430 frequently appears together with P0420, P0036, P0137, P0037, P0141. These related codes typically originate from the same system modification and should be addressed together in the calibration.

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