Network
generic / SAE
U0075
Control Module Communication Bus "B" Performance
Bus B is operational but performance is degraded — error frames or out-of-spec timing. Modules on this bus may behave erratically.
SystemNetwork
Typegeneric / SAE
GroupU0
Range / number– / 75
Possible causes
- Corrosion or poor contact in connectors high
- One module sending malformed frames 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: 80–1200 €
- Estimated time: 1–6 h
- Component: can bus wiring
- Component: control module
- MIL / check engine light
Sources
References
sae:J2012
iso:11898