B123A Ford Code - Left Front Turn Indicator Circuit Short
Quick Answer
The Steering Column Control Module (SCCM) monitors the multifunction switch position. Common causes include Faulty Left Front Turn Indicator, Left Front Turn Indicator harness is open or shorted, Left Front Turn Indicator circuit poor electrical connection. Severity is Low - monitor the vehicle and repair when practical. The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.
- What it means
- B123A Ford indicates Left Front Turn Indicator Circuit Short.
- Common causes
- Common causes include Faulty Left Front Turn Indicator, Left Front Turn Indicator harness is open or shorted, Left Front Turn Indicator circuit poor electrical connection.
- Severity
- Low - monitor the vehicle and repair when practical.
- Can I drive?
- The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.
Code B123A Ford Description
The timed on/off cycle for turn lamps is determined by the BCM and is set to flash approximately 80 times per minute if both the front and rear turn signal lamps operate correctly. If an individual turn signal lamp is inoperative, the BCM fast flashes the remaining turn lamp approximately 160 times per minute to indicate a bulb outage to the driver. The OBDII sets when the BCM detects the front, rear or exterior mirror turn lamp output is not to factory specifications.
What are the Possible Causes of the DTC B123A Ford?
- Faulty Left Front Turn Indicator
- Left Front Turn Indicator harness is open or shorted
- Left Front Turn Indicator circuit poor electrical connection
- Faulty Body Control Module (BCM)
How to Fix the DTC B123A Ford?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
Code Tech Notes
B123A:15 Left Front Turn Indicator Circuit Short To Battery or Open
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the B123A Ford code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Frequently Asked Questions about B123A Ford Code
1. What does OBDII code B123A mean on a Ford vehicle?
Code B123A indicates a short circuit in the left front turn indicator wiring or related components.
2. What are the symptoms of code B123A in a Ford vehicle?
Common symptoms include the left front turn signal not working, rapid flashing of the turn signal indicator, or a warning message on the dashboard.
3. What causes the B123A code to appear?
This code is typically caused by damaged wiring, a corroded bulb socket, a faulty bulb, or a shorted turn signal module.
4. How can I diagnose the B123A code on my Ford?
Start by inspecting the left front turn signal bulb, its socket, and the associated wiring for damage, corrosion, or signs of a short circuit.
5. Can a bad turn signal bulb cause the B123A code?
Yes, a faulty or shorted bulb can cause this code. Replacing the bulb is a simple first step in troubleshooting.
6. How do I fix the B123A code on a Ford?
Repairs typically involve replacing a damaged bulb, repairing or replacing faulty wiring, or cleaning corroded bulb sockets.
7. Can I continue driving with the B123A code?
While the vehicle is still drivable, the left front turn signal may not function, which can be unsafe and illegal in some areas.
8. How much does it cost to fix the B123A code?
Repair costs vary depending on the cause but can range from $10 for a bulb replacement to $200 or more if wiring or module repairs are needed.
9. Will clearing the B123A code fix the problem?
Clearing the code without addressing the root cause will not fix the problem, and the code will likely return.
10. Can a damaged fuse cause the B123A code?
While rare, a blown fuse related to the turn signal circuit could contribute to the issue. Checking fuses is part of the diagnostic process.
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