B2780
Push Switch / Key Unlock Warning Switch Malfunction
B2780 is an OBD-II diagnostic trouble code meaning: Push Switch / Key Unlock Warning Switch Malfunction. Common causes: mechanical damage to the key unlock button, open or short circuit in the button circuit. Estimated repair cost: $56–167.
Symptoms
- Problems with unlocking the ignition switch
- The malfunction indicator on the dashboard lights up
- The car does not respond to pressing the key unlock button
Causes
- Mechanical damage to the key unlock button
- Open or short circuit in the button circuit
- Wiring harness fault
- Problems with the ignition switch control module
How to Fix
- Check the key unlock button for mechanical damage
- Check the continuity of the button circuit using a multimeter
- Inspect the wiring harness for damage
- If necessary, replace the button or ignition switch control module
Related codes
FAQ
What does the B2780 code mean?
B2780 is an OBD-II diagnostic trouble code that indicates: Push Switch / Key Unlock Warning Switch Malfunction
What causes a B2780 error code?
The most common causes of B2780 include: Mechanical damage to the key unlock button; Open or short circuit in the button circuit; Wiring harness fault; Problems with the ignition switch control module.
How do I fix a B2780 diagnostic trouble code?
To fix B2780: Check the key unlock button for mechanical damage. Check the continuity of the button circuit using a multimeter. Inspect the wiring harness for damage. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with B2780?
Limited driving only, diagnose soon
How much does it cost to fix B2780?
The estimated repair cost for B2780 is $56–167. Actual cost depends on your vehicle, location, and labor rates.
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