Code result
U0145
Lost Communication with Restraints Control Module Auxiliary
Moderate severity
What it means
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?
Use caution
The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical.
Most likely causes
Auxiliary restraint module failed
mediumA plausible cause — test and verify before replacing parts.
Gateway module routing CAN messages incorrectly
lowLess common, but worth ruling out after the more likely causes.
CAN terminating resistor (120 Ω) drifted out of spec
lowLess common, but worth ruling out after the more likely causes.
Related help
Get the full diagnosis
Add your vehicle and see step-by-step repair help, recalls, and TSBs in Wrenchify.
Diagnose U0145 freeNo credit card required