B0272 code meaning
Power Door Lock Switch Circuit
What B0272 means
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.
B0272 at a glance
- Check engine lightUsually not
- Emissions testNot an emissions code
- Limp modeNot expected
- Repair difficultyEasy, DIY possible
- Typical labor0.5 to 1.5 hours
- Clears after repairWhen cleared with a scanner
Symptoms of B0272
- Interior lock button does not lock or unlock the doors
- Locks cycle unexpectedly or only react to the remote key
Common causes of B0272
- Most likelyCentral-locking button mechanically stuck or contacts worn
- PossibleSwitch wire shorted to ground or open between switch and module
- Less likelySpilled liquid or condensation in the switch panel
- Less likelyDoor or body control module misreads the switch input
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Door lock switchDoor wiring harnessBody control module
What each part of B0272 means
| B | Body system: airbags, seat belts, power seats, lights and climate control. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 72 | The exact fault in that area. |
What to do next
- Note B0272 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about B0272
What does B0272 mean?
B0272 means "Power Door Lock Switch Circuit". Neither the reachable J2012 lists nor any carmaker's documents mention B0272, which leaves the code unproven. It is a generic code, so it means the same on every make.
Is it safe to drive with B0272?
B0272 does not normally turn on the check engine light by itself. Watch for the symptoms above and have it checked soon.
Will B0272 fail an emissions test?
B0272 is not an emissions code, so on its own it usually does not fail an emissions test. Other stored codes or a lit check engine light still can.
How hard is B0272 to fix?
Difficulty: easy. A typical repair takes 0.5 to 1.5 hours of work. A careful DIY repair is possible with basic tools and a scanner.
Will B0272 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.