Network
generic / SAE
U0300
Internal Control Module Software Incompatibility
A control module has detected that its software version is incompatible with another module on the bus. Most often after a partial update, mismatched coding, or fitting a used module from a different vehicle.
SystemNetwork
Typegeneric / SAE
GroupU0
Range / number3 / 00
Possible causes
- Software/calibration mismatch between modules high
- Used module from different vehicle fitted medium
- Incomplete or interrupted module flash medium
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: control module
- MIL / check engine light
Sources
References
sae:J2012