B0272Power Door Lock Switch Circuit
- Generic OBD-II code · Body
- How the car detects it
- Neither the reachable J2012 lists nor any carmaker's documents mention B0272, which leaves the code unproven. Its title covers the interior central-locking button in general, without naming a door. Saab logs a held button in the 9-3 driver door module as B3270 61: if the input stays low, the module waits until the key is released and pressed again before acting. In US6365986B1 such a manual switch inside the door is one of two inputs, next to the key-cylinder contact, from which the control unit drives the lock motors. US6157090A codes each switch position with its own resistor, so the body module reads the position as a current level. The door-specific switch codes are B0265 and B0270; actuator faults are B0530 ff.
- What you may notice
- Interior lock button does not lock or unlock the doors
- Locks cycle unexpectedly or only react to the remote key
- Likely causes
- LikelyCentral-locking button mechanically stuck or contacts worn
- PossibleSwitch wire shorted to ground or open between switch and module
- RareSpilled liquid or condensation in the switch panel
- RareDoor or body control module misreads the switch input
- 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.