B2A23
High Beam Input Circuit Short To Ground
B2A23 is an OBD-II diagnostic trouble code meaning: High Beam Input Circuit Short To Ground. Common causes: short circuit to ground in switch wiring harness, damaged control signal wire insulation. Estimated repair cost: $22–111.
Symptoms
- High beam stays on constantly or does not turn on
- The high beam indicator on the dashboard does not light up correctly
- The electrical system fault warning light is on
- Cannot switch from low to high beam
- Error code persists after reset
Causes
- Short circuit to ground in switch wiring harness
- Damaged control signal wire insulation
- Faulty steering column switch
- Oxidation of the connector in the high beam control circuit
- BCM malfunction
How to Fix
- Read error codes and record conditions for occurrence
- Check the steering column switch for an internal short.
- Inspect the wiring harness from the switch to the BCM for damage.
- Measure the voltage on the signal wire with the switch off (should be 5V or 12V)
- Repair short circuit or replace switch
- Reset codes and check high beam operation
Related codes
FAQ
What does the B2A23 code mean?
B2A23 is an OBD-II diagnostic trouble code that indicates: High Beam Input Circuit Short To Ground
What causes a B2A23 error code?
The most common causes of B2A23 include: Short circuit to ground in switch wiring harness; Damaged control signal wire insulation; Faulty steering column switch; Oxidation of the connector in the high beam control circuit.
How do I fix a B2A23 diagnostic trouble code?
To fix B2A23: Read error codes and record conditions for occurrence. Check the steering column switch for an internal short.. Inspect the wiring harness from the switch to the BCM for damage.. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with B2A23?
Do not drive — repair immediately
How much does it cost to fix B2A23?
The estimated repair cost for B2A23 is $22–111. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat