Network
generic / SAE
U0008
High Speed CAN Communication Bus (-) High
The CAN-Low signal is held above its valid range, typically because of a short to battery voltage on the CAN-L wire. Bus communication is lost for every node sharing this segment.
SystemNetwork
Typegeneric / SAE
GroupU0
Range / number– / 08
Possible causes
- CAN-Low shorted to battery voltage high
- Chafed harness against power wire 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: 1–6 h
- Component: can low wire
- Component: module connector
- MIL / check engine light
- limp mode possible
Sources
References
sae:J2012
iso:11898