Ignition / MisfireHigh ImpactPetrol

P0305 — Diagnostic Trouble Code P0305

OBD-II diagnostic code P0305 relates to the ignition / misfire system. This code is logged when the ECU detects a parameter outside its expected operating range.

4+

Affected Brands

6+

ECU Platforms

1

Related Services

5

Related DTCs

Symptoms

What the driver typically experiences when P0305 is stored

!Check Engine Light (may flash)
iEngine misfires
iRough idle
iLoss of power

Why does P0305 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 P0305

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 P0305

Stage 1

Related Diagnostic Codes

Codes from the same diagnostic system as P0305

P0300High Impact

Random/Multiple Cylinder Misfire Detected

P0306High Impact

Diagnostic Trouble Code P0306

P0201Low Impact

Diagnostic Trouble Code P0201

P0202Low Impact

Diagnostic Trouble Code P0202

P0203Low Impact

Diagnostic Trouble Code P0203

Affected ECU Platforms

Bosch MG1CS201Bosch MG1CS002Bosch MG1CP002Keihin SH7058Bosch ME9.7bosch me2.8

Commonly Affected Vehicles

PorscheMacanBosch MG1CS002
BMW5 Serie - M5 Sedan�Bosch MG1CS201
MBCLSBosch MG1CP002
HondaodysseyKeihin SH7058
MBMLbosch me2.8

Based on data from 4+ vehicle brands. P0305 is not limited to these models.

Frequently Asked Questions

What does P0305 mean?â–¼
OBD-II diagnostic code P0305 relates to the ignition / misfire system. This code is logged when the ECU detects a parameter outside its expected operating range.
Why does P0305 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 P0305 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 P0305?â–¼
P0305 is commonly found on Porsche, BMW, MB, Honda vehicles equipped with Bosch MG1CS201, Bosch MG1CS002, Bosch MG1CP002, Keihin SH7058 ECU platforms.
What other codes appear alongside P0305?â–¼
P0305 frequently appears together with P0300, P0306, P0201, P0202, P0203. These related codes typically originate from the same system modification and should be addressed together in the calibration.

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