Network
generic / SAE
U0301
Software Incompatibility with ECM/PCM
A control module has detected that its software/calibration is incompatible with the engine ECM/PCM. Typically appears after a partial flash, mismatched coding, or fitting a used ECM from a different vehicle.
SystemNetwork
Typegeneric / SAE
GroupU0
Range / number3 / 01
Possible causes
- Software/calibration mismatch with ECM high
- Used ECM from different vehicle fitted medium
- Gateway module routing CAN messages incorrectly low
Symptoms
- Multiple warning lights may illuminate
- Affected modules may go into limp mode or shut down
- Specific functions inoperative depending on module
- Diagnostic tools may show communication faults
Inspection / repair
- Difficulty: hard
- DIY: shop recommended
- Estimated cost: 80–800 €
- Estimated time: 0.5–3 h
- Component: ecm
- Component: control module
- MIL / check engine light
- emissions-relevant
Sources
References
sae:J2012