B23A1
Flash To Pass / Optical Horn Switch Circuit Stuck
B23A1 is an OBD-II diagnostic trouble code meaning: Flash To Pass / Optical Horn Switch Circuit Stuck. Common causes: stuck/damaged steering column switch contacts, open/short circuit in wiring harness. Estimated repair cost: $22–89.
Symptoms
- Failure of the Flash To Pass function (short-term inclusion of high beams)
- Spontaneous turning on/off of high beams
- Check Engine Light or Headlight Warning Is On
Causes
- Stuck/damaged steering column switch contacts
- Open/short circuit in wiring harness
- Oxidation or poor contact in connectors
- Body Control Module (BCM) malfunction
How to Fix
- Diagnostics of the operation of the steering column switch
- Checking the integrity of the wiring harness from the switch to the BCM
- Cleaning contacts in connectors
- Checking BCM block parameters with a scanner
- Replacing a faulty switch or repairing wiring
Related codes
FAQ
What does the B23A1 code mean?
B23A1 is an OBD-II diagnostic trouble code that indicates: Flash To Pass / Optical Horn Switch Circuit Stuck
What causes a B23A1 error code?
The most common causes of B23A1 include: Stuck/damaged steering column switch contacts; Open/short circuit in wiring harness; Oxidation or poor contact in connectors; Body Control Module (BCM) malfunction.
How do I fix a B23A1 diagnostic trouble code?
To fix B23A1: Diagnostics of the operation of the steering column switch. Checking the integrity of the wiring harness from the switch to the BCM. Cleaning contacts in connectors. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with B23A1?
Limited driving only, diagnose soon
How much does it cost to fix B23A1?
The estimated repair cost for B23A1 is $22–89. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat