B0520Passenger Door Open Switch
- Generic OBD-II code · Body
- How the car detects it
- No accessible J2012 list contains B0520, and its meaning is not published by any carmaker. The code exists at GM: PIP5094, a circuit-testing bulletin for 2014 and earlier GM vehicles, lists it as a keyword but leaves it undefined. The title describes the switch reporting that the front passenger door is opening. GM's 2011 Saab 9-5 monitors the matching right front exterior handle switch as B1474 02 and disables that handle once the line is grounded or stays closed beyond 60 s. Toyota's EP2372055A1 adds a plausibility check for intermittent switch faults: if a smart-key unlock is followed by the key being found inside the cabin without any door-open signal, the switch is judged faulty. Driver side: B0510.
- What you may notice
- Passenger door opening not detected by interior light or alarm
- Passenger exterior handle ignored by the keyless system
- Auto-lock may relock the car with the key inside
- Likely causes
- LikelyPassenger door switch contacts worn, greased up or frozen
- PossibleWire break in the passenger door hinge passage
- PossibleExterior handle switch shorted by water ingress
- RareBody or keyless entry module input faulty
- Repair
- Easy · Often possible to do yourself.Typical cost: €20 – €200
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.