OBD-II code · Network
U0145 Lost Communication with Restraints Control Module Auxiliary
A secondary or auxiliary airbag/restraints controller (e.g. for rear or curtain bags) has stopped responding. The airbag warning lamp lights up and parts of the restraint system may be disabled.
Is it safe to drive with U0145?
Usually safe for short trips, but don’t ignore it: the underlying fault can get more expensive over time.
Common causes
- PossibleAuxiliary restraint module failed
- Less likelyGateway module routing CAN messages incorrectly
- Less likelyCAN terminating resistor (120 Ω) drifted out of spec
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
Repair at a glance
- Difficulty
- Hard
- DIY friendly
- Best left to a mechanic
- Typical labour
- 1–4 h
- Emissions test
- Usually unaffected
- Parts involved
- Auxiliary Restraint Module, Can Bus Wiring
Related codes
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.