Network
generic / SAE
U007A
Control Module Communication Bus H Off
The control module communication bus H is off — the gateway has shut down or isolated this bus, often due to repeated bus errors or a "bus off" event in the CAN controller.
SystemNetwork
Typegeneric / SAE
GroupU0
Range / number– / 7A
Possible causes
- CAN controller in bus-off state from repeated errors 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: 120–1500 €
- Estimated time: 1–6 h
- Component: bus h gateway
- Component: bus h wiring
- MIL / check engine light
- limp mode possible
Sources
References
sae:J2012