U0221Lost Communication With Door Switch G
- Generic OBD-II code · Network
- How the car detects it
- U0221 is stored when door switch unit G no longer replies. The weak spot is often the passage between door and body, where the harness bends at every opening. FCA STAR cases S1808000031 and S2108000106 (Jeep Compass 2018–2021) describe it: corrosion at the driver door-to-body connector and a badly seated rubber grommet led to intermittent windows, locks and mirrors, rear windows lowering on their own, door-ajar warnings, start/stop dropouts and LIN complaints; the fix was cleaning the connector, seating it fully and aligning the grommet. Those cases list B-codes, not U0221. No manufacturer documents U0221 publicly; which door carries G depends on the maker. No MIL.
- What you may notice
- Windows, locks and mirrors fail intermittently
- Door-ajar warning while driving
- Start/stop function stops working at times
- Likely causes
- LikelyCorroded door-to-body connector behind a poorly sealing grommet
- PossibleDoor connector not fully engaged
- PossibleWire chafed or broken inside the grommet
- RareSwitch unit G failed
- Repair
- Medium · Often possible to do yourself.Typical cost: €10 – €350
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.