B3140
Driver Door Unlock Switch Circuit
B3140 is an OBD-II diagnostic trouble code meaning: Driver Door Unlock Switch Circuit. Common causes: open or short circuit in the button circuit, malfunction of the unlock button itself. Estimated repair cost: $22–56.
Symptoms
- Driver's door unlock button does not work
- The door does not unlock when the button is pressed
- False alarms of the locking system
Causes
- Open or short circuit in the button circuit
- Malfunction of the unlock button itself
- Wiring harness damage
- Problems with the body module
How to Fix
- Check the integrity of the unlock button circuit
- Test the button itself for malfunction
- Inspect the wiring harness for damage
- If necessary, replace the button or repair the wiring
Related codes
Error B3140 by Vehicle Brand
FAQ
What does the B3140 code mean?
B3140 is an OBD-II diagnostic trouble code that indicates: Driver Door Unlock Switch Circuit
What causes a B3140 error code?
The most common causes of B3140 include: Open or short circuit in the button circuit; Malfunction of the unlock button itself; Wiring harness damage; Problems with the body module.
How do I fix a B3140 diagnostic trouble code?
To fix B3140: Check the integrity of the unlock button circuit. Test the button itself for malfunction. Inspect the wiring harness for damage. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with B3140?
Yes, but get it checked soon
How much does it cost to fix B3140?
The estimated repair cost for B3140 is $22–56. Actual cost depends on your vehicle, location, and labor rates.
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