B2126
Detention Switch
B2126 is an OBD-II diagnostic trouble code meaning: Detention Switch. Common causes: faulty lock switch, open or short circuit in wiring harness. Estimated repair cost: $56–167.
Symptoms
- The security system malfunction indicator is on
- Airbags may not deploy in an emergency situation
- The passive safety system can be partially or completely disabled
Causes
- Faulty lock switch
- Open or short circuit in wiring harness
- Poor contact in the switch connector
- Problems with the security control module
How to Fix
- Check the condition of the lock switch
- Inspect the wiring harness and connectors for damage
- Check the resistance of the switch with a multimeter
- If necessary, replace the lock switch
- Reset the error and check the system
Related codes
FAQ
What does the B2126 code mean?
B2126 is an OBD-II diagnostic trouble code that indicates: Detention Switch
What causes a B2126 error code?
The most common causes of B2126 include: Faulty lock switch; Open or short circuit in wiring harness; Poor contact in the switch connector; Problems with the security control module.
How do I fix a B2126 diagnostic trouble code?
To fix B2126: Check the condition of the lock switch. Inspect the wiring harness and connectors for damage. Check the resistance of the switch with a multimeter. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with B2126?
Do not drive — repair immediately
How much does it cost to fix B2126?
The estimated repair cost for B2126 is $56–167. Actual cost depends on your vehicle, location, and labor rates.
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