B0274Trunk Lid Release Switch Circuit
- Generic OBD-II code · Body
- How the car detects it
- Nothing public confirms B0274 – the publicly available J2012 tables skip it and no maker explains it. The title refers to the switch the driver or a passer-by uses to release the boot lid electrically. Saab treats the button separately in the 9-3: the driver door module sets B2730 61 when the boot button stays active for more than 20 s, after which the lid will not open. Downstream, Saab and GM log the release output itself (9-3 B3265, 9-5 2011 B3265 02 for a grounded relay control line). Remote-release patents such as US4979384A and US3917330A show the basic layout: a switch energises a solenoid or motor in the latch. A switch-circuit fault leaves the lid shut or, if shorted, can pop it open unexpectedly.
- What you may notice
- Boot lid cannot be opened with the button, only by key or remote
- Lid unlatches without anyone pressing the button
- Likely causes
- LikelyExterior release button corroded or full of water and dirt
- PossibleWires broken in the flexible boot lid hinge loom
- PossibleInterior release button held or jammed by trim
- RareDoor or body module input reading the switch defective
- Repair
- Easy · Often possible to do yourself.Typical cost: €30 – €200
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.