U3011Ignition Input Off
- Generic OBD-II code · Network
- How the car detects it
- U3011 relates to the input that tells a module the ignition is off, for instance a key-in or off-state line. The code is set when that input reports off while the network says the car is running, or fails to report off when every other source does. This matters because modules plan their shutdown around it: Ford's patent US5945745A describes control modules that run fully while an ignition detector sees the ignition and drop into a low-current sleep once the signal disappears. A false off can therefore cut functions while driving, and a missing off can keep modules awake and draw the battery down. GM's 2012 truck wiring manual likewise lets the body controller sleep only with the switch off and the key out. No manufacturer documents U3011 publicly.
- What you may notice
- Modules not going to sleep, battery drained after parking
- Functions switching off briefly while driving
- Likely causes
- PossibleFaulty key-in or off-position contact in the switch
- PossibleOff-state input wire open or shorted
- RareBody control module reporting a wrong power mode
- RareFaulty input stage in the reading module
- Repair
- Medium · Usually a job for a workshop.Typical cost: €30 – €500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.