Ignition / MisfireHigh ImpactPetrol

P0301 — Diagnostic Trouble Code P0301

OBD-II diagnostic code P0301 relates to the ignition / misfire system. This code is logged when the ECU detects a parameter outside its expected operating range.

6+

Affected Brands

12+

ECU Platforms

3

Related Services

8

Related DTCs

Symptoms

What the driver typically experiences when P0301 is stored

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

Why does P0301 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 P0301

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 P0301

Stage 1Stage 2DTC Off

Related Diagnostic Codes

Codes from the same diagnostic system as P0301

P0303High Impact

Diagnostic Trouble Code P0303

P0304High Impact

Diagnostic Trouble Code P0304

P0300High Impact

Random/Multiple Cylinder Misfire Detected

P0302High Impact

Diagnostic Trouble Code P0302

P0017Moderate Impact

Diagnostic Trouble Code P0017

P0014Moderate Impact

Diagnostic Trouble Code P0014

P0366High Impact

Diagnostic Trouble Code P0366

P0201Low Impact

Diagnostic Trouble Code P0201

Affected ECU Platforms

Bosch MED17.7.2Siemens TRONIC T8Bosch MED17.1.9Bosch MED17.1.9 MED17.9.9Bosch MED17.4.2Bosch MED17.5.21Siemens/Continental SIMOS12Bosch MED17Bosch MED9.6Siemens/Continental SIMOS10.1xBosch MED 9.1Valeo V40

Commonly Affected Vehicles

Saab9-3Siemens TRONIC T8
Land RoverRange RoverBosch MED17.1.9
Peugeot308Bosch MED17.4.2
AudiA3Bosch MED17.5.21
MBA / A BerlineBosch MED17.7.2
AudiA4Siemens/Continental SIMOS12
Land RoverRange Rover EvoqueBosch MED17
FerrariFFBosch MED9.6

Based on data from 6+ vehicle brands. P0301 is not limited to these models.

Frequently Asked Questions

What does P0301 mean?â–¼
OBD-II diagnostic code P0301 relates to the ignition / misfire system. This code is logged when the ECU detects a parameter outside its expected operating range.
Why does P0301 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 P0301 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 P0301?â–¼
P0301 is commonly found on Saab, Land Rover, Peugeot, Audi, MB, Ferrari vehicles equipped with Bosch MED17.7.2, Siemens TRONIC T8, Bosch MED17.1.9, Bosch MED17.1.9 MED17.9.9 ECU platforms.
What other codes appear alongside P0301?â–¼
P0301 frequently appears together with P0303, P0304, P0300, P0302, P0017. These related codes typically originate from the same system modification and should be addressed together in the calibration.

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