B108A Ford Code - Start Button General Electrical Failure
Quick Answer
Conventional Ignition Switch: The ignition switch is a multiple position rotary switch that is controlled by a lock cylinder and a key. Common causes include Faulty Start Button Switch, Start Button Switch harness is open or shorted, Start Button Switch circuit poor electrical connection. Severity is Moderate - service should be scheduled soon. The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.
- What it means
- B108A Ford indicates Start Button General Electrical Failure.
- Common causes
- Common causes include Faulty Start Button Switch, Start Button Switch harness is open or shorted, Start Button Switch circuit poor electrical connection.
- Severity
- Moderate - service should be scheduled soon.
- Can I drive?
- The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.
Code B108A Ford Description
The ignition switch is a multiple position rotary switch that is controlled by a lock cylinder and a key. The ignition switch provides voltage to the ACC, ON, or START-designated circuits depending on the position it is placed. The Body Control Module (BCM) calculates the positions based on the voltage received from the ACC and ON-designated circuits.
The key removal inhibit solenoid (also known as the key release interlock actuator) is an electronically controlled solenoid that prevents the ignition lock cylinder from being turned to the OFF position unless the gear selector lever is in the PARK position. The key removal inhibit solenoid is part of the ignition switch.
Push Button Ignition Switch:
The push button ignition switch is used instead of a conventional ignition switch to achieve the various ignition modes. The push button ignition switch is a momentary dual contact switch. Both sets of contacts are normally open and receive the voltage at all times. When the START/STOP button is pressed, the voltage is sent to the BCM, the RFA module, and the PCM to indicate a button press.
The ignition switch has a LED for switch illumination when the backlighting is activated.
What are the Possible Causes of the DTC B108A Ford?
- Faulty Start Button Switch
- Start Button Switch harness is open or shorted
- Start Button Switch circuit poor electrical connection
- Faulty Body Control Module (BCM)
How to Fix the DTC B108A 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.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the B108A 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 B108A Ford Code
1. What does the OBDII code B108A on a Ford indicate?
The B108A code on a Ford signifies a "Start Button General Electrical Failure," which means there is an electrical issue with the start button system used to initiate the engine.
2. What are the common symptoms of code B108A in Ford vehicles?
Symptoms may include the engine not starting, intermittent operation of the start button, and possibly other electrical accessories behaving erratically.
3. What can cause the B108A code to appear on my Ford?
Possible causes include a faulty start button, poor electrical connections to the start button, a bad relay or fuse, or issues with the vehicle’s wiring harness.
4. How do I troubleshoot the B108A Ford code?
Start by checking the start button for any visible damage, ensure the wiring connections are secure and in good condition, inspect related fuses and relays, and consider using a multimeter to check for continuity issues.
5. Can I still drive my vehicle with a B108A code active?
While the vehicle may still be drivable, it's not advisable as the engine might fail to start or stop unexpectedly due to the electrical issues related to the start button.
6. What are the repair options for fixing a B108A code on a Ford?
Repairs might involve replacing the start button itself, repairing or replacing any faulty wiring or connectors, and replacing any defective fuses or relays associated with the start system.
7. Is the B108A code a serious issue?
Yes, it is considered serious because it affects the vehicle’s ability to start, which can leave you stranded or unable to use the vehicle when needed.
8. Will a B108A code clear on its own after the problem is fixed?
After repairing the underlying issue, the B108A code will typically need to be manually cleared using an OBDII scanner. However, if the repair effectively resolves the problem, the code should not reappear.
9. What tools are required to diagnose the B108A code on a Ford?
A basic set of hand tools for accessing the start button and its connections, a multimeter for electrical testing, and an OBDII scanner for reading and clearing the code are essential for diagnosis.
10. How can I prevent the B108A code from occurring in my Ford?
Regular maintenance checks, ensuring that all electrical connections are clean and secure, and timely replacement of worn-out electrical components can help prevent issues related to the B108A code.
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