U3005Retained Accessory Power
- Generic OBD-II code · Network
- How the car detects it
- U3005 relates to retained accessory power (RAP), which keeps radio, windows or sunroof alive for a while after the key is switched off. GM's truck manual explains the logic: the body module holds its internal RAP relay for about ten minutes after key-off, and ends RAP early when a door opens or battery voltage sinks below a calibrated limit; some modules get the RAP state as a bus message instead. No manufacturer documents U3005 itself publicly, so the code most likely flags a RAP output or message that does not follow these rules. GM's PIE0724 for 2022 Silverado, Sierra and Envision shows the typical consequence of a RAP fault: radio still on afterwards and a dead battery, checked with a parasitic draw test against 50 mA. Not emission-related, no MIL.
- What you may notice
- Radio, windows or sunroof working long after key-off or not at all after key-off
- High parasitic drain and flat battery
- Likely causes
- PossibleRAP relay or output stage staying on or not switching on
- PossibleFaulty door switch signal, so RAP is not ended on door opening
- PossibleBody module or radio software handling the RAP state wrongly
- RareWiring fault or add-on device back-feeding the accessory circuit
- Repair
- Medium · Often possible to do yourself.Typical cost: €20 – €500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.