Network
generic / SAE
U0303
Software Incompatibility with Transfer Case Control Module
A control module has detected that its software/calibration is incompatible with the transfer case control module. AWD/4WD modes may not work correctly until matching software is flashed.
SystemNetwork
Typegeneric / SAE
GroupU0
Range / number3 / 03
Possible causes
- Software/calibration mismatch with transfer case high
- Used transfer case module 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: transfer case control module
- Component: control module
- MIL / check engine light
Sources
References
sae:J2012