Network
generic / SAE
U0307
Software Incompatibility with Glow Plug Control Module
The glow plug controller and the engine ECU run incompatible software versions. Cold-start preheating may be inhibited and the glow plug warning lamp can stay on.
SystemNetwork
Typegeneric / SAE
GroupU0
Range / number3 / 07
Possible causes
- Software flash mismatch after parts swap 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: hard
- DIY: shop recommended
- Estimated cost: 80–500 €
- Estimated time: 0.5–2 h
- Component: glow plug module
- Component: ecm
- MIL / check engine light
Sources
References
sae:J2012