Network
generic / SAE
U0131
Lost Communication with Power Steering Control Module
The Power Steering Control Module has stopped transmitting on the vehicle data bus, so other control units no longer receive its messages. Electric power steering can fail, requiring much higher steering effort. Typical causes are loss of power or ground at the module, an open or shorted CAN/LIN bus wire, a connector fault, or an internal module failure.
SystemNetwork
Typegeneric / SAE
GroupU0
Range / number1 / 31
Possible causes
- EPS module unpowered (large fuse on battery) high
- CAN wiring to EPS broken 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: 100–2000 €
- Estimated time: 1–6 h
- Component: power steering module
- Component: can bus wiring
- MIL / check engine light
Sources
References
sae:J2012