Network
generic / SAE
U0139
Lost Communication with Active Roll Control Module
The active anti-roll bar / dynamic chassis controller has dropped off the bus. The vehicle behaves as if the system is disabled; rolling motion is not actively counteracted.
SystemNetwork
Typegeneric / SAE
GroupU0
Range / number1 / 39
Possible causes
- Active roll module unpowered 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: 80–800 €
- Estimated time: 0.5–3 h
- Component: active roll module
- Component: can bus wiring
- MIL / check engine light
Sources
References
sae:J2012