OBD-II code · Network (extended)
U3005 Retained Accessory Power
Fault on the retained accessory power (RAP) function that keeps comfort loads (windows, radio) powered for a short time after the key is removed.
Is it safe to drive with U3005?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyRAP relay or BCM logic 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
- Medium
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.5–2 h
- Emissions test
- Usually unaffected
- Parts involved
- Rap Relay, Body Control Module
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.