Network
generic / SAE
U0325
Software Incompatibility with Auxiliary Heater Control Module
The auxiliary heater module is running incompatible software. The pre-heater may not start or aborts operation early.
SystemNetwork
Typegeneric / SAE
GroupU0
Range / number3 / 25
Possible causes
- Incompatible flash version high
- Gateway module routing CAN messages incorrectly low
- CAN terminating resistor (120 Ω) drifted out of spec 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: medium
- DIY: shop recommended
- Estimated cost: 60–400 €
- Estimated time: 0.3–1.5 h
- Component: auxiliary heater
Sources
References
sae:J2012