Network
generic / SAE
U0013
Medium Speed CAN Communication Bus (-) Low
The CAN-Low signal of the medium-speed bus is shorted to ground. Comfort and body modules can no longer exchange messages and trigger several user-visible faults at once (windows, locking, lighting).
SystemNetwork
Typegeneric / SAE
GroupU0
Range / number– / 13
Possible causes
- CAN-Low shorted to ground high
- Water ingress in door connector 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: 60–600 €
- Estimated time: 0.8–5 h
- Component: can low wire
- Component: body control module
- MIL / check engine light
Sources
References
sae:J2012
iso:11898