B1540
Mirror Driver Switch Assembly Circuit Open
B1540 is an OBD-II diagnostic trouble code meaning: Mirror Driver Switch Assembly Circuit Open. Common causes: broken wires in the switch circuit, mirror switch malfunction. Estimated repair cost: $22–56.
Symptoms
- Inability to adjust driver's mirror
- Mirror adjustment buttons do not work
- The malfunction indicator on the instrument panel lights up
Causes
- Broken wires in the switch circuit
- Mirror switch malfunction
- Wiring harness damage
- Poor contact in connectors
How to Fix
- Check the integrity of the wires in the switch circuit
- Inspect connectors for oxidation or damage
- Check the functionality of the mirror switch
- If necessary, replace the switch or damaged wires
Related codes
FAQ
What does the B1540 code mean?
B1540 is an OBD-II diagnostic trouble code that indicates: Mirror Driver Switch Assembly Circuit Open
What causes a B1540 error code?
The most common causes of B1540 include: Broken wires in the switch circuit; Mirror switch malfunction; Wiring harness damage; Poor contact in connectors.
How do I fix a B1540 diagnostic trouble code?
To fix B1540: Check the integrity of the wires in the switch circuit. Inspect connectors for oxidation or damage. Check the functionality of the mirror switch. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with B1540?
Limited driving only, diagnose soon
How much does it cost to fix B1540?
The estimated repair cost for B1540 is $22–56. Actual cost depends on your vehicle, location, and labor rates.
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