U0220Lost Communication With Door Switch F
- Generic OBD-II code · Network
- How the car detects it
- U0220 reports that door switch unit F has stopped communicating. Water is a well-documented enemy of such units. GM recall 14V404 (bulletin 14309) covered 2005–2007 TrailBlazer, Envoy, Rainier and Saab 9-7X: salty melt water reaching the driver-door module corroded its circuit board, so lock and window switches worked only now and then, windows could move by themselves and the board could overheat; dealers fitted a new module. On 2014–2018 GM pickups and SUVs, bulletin 18-NA-079 traces LIN losses of the driver window switch to water at the door-to-body connector X500, using GM's own code U1538. No manufacturer documents U0220 itself; the letter is assigned per make. No MIL.
- What you may notice
- Window or lock keys work only intermittently
- Window moves without a button press
- Heat or burnt smell at the door switch panel
- Likely causes
- LikelyWater or salt slush inside the switch unit, corroded circuit board
- PossibleCorrosion at the door-to-body connector
- PossibleBroken wire in the door harness
- RareSwitch unit failed without visible moisture
- Repair
- Medium · Often possible to do yourself.Typical cost: €30 – €450
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.