B3123
Keyless Entry Antenna 5
B3123 is an OBD-II diagnostic trouble code meaning: Keyless Entry Antenna 5. Common causes: broken or damaged antenna wiring harness, malfunction of the antenna itself. Estimated repair cost: $167–333.
Symptoms
- Problems with keyless entry
- The system does not recognize the key in certain areas of the cabin
- Error indication on the dashboard
Causes
- Broken or damaged antenna wiring harness
- Malfunction of the antenna itself
- Problems with the keyless entry module
How to Fix
- Checking the antenna wiring harness for breaks and damage
- Checking Antenna Resistance
- Replacing antenna 5 if necessary
- Checking and updating the keyless entry module software
Related codes
Error B3123 by Vehicle Brand
FAQ
What does the B3123 code mean?
B3123 is an OBD-II diagnostic trouble code that indicates: Keyless Entry Antenna 5
What causes a B3123 error code?
The most common causes of B3123 include: Broken or damaged antenna wiring harness; Malfunction of the antenna itself; Problems with the keyless entry module.
How do I fix a B3123 diagnostic trouble code?
To fix B3123: Checking the antenna wiring harness for breaks and damage. Checking Antenna Resistance. Replacing antenna 5 if necessary. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with B3123?
Yes, but get it checked soon
How much does it cost to fix B3123?
The estimated repair cost for B3123 is $167–333. Actual cost depends on your vehicle, location, and labor rates.
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