B108A 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 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 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?
- 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?
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 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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Information for Specific Makes
- B108A Ford — Start Button General Electrical Failure
- B108A Lincoln — Start Button General Electrical Failure
- B108A Mercury — Start Button General Electrical Failure
Frequently Asked Questions about B108A Code
1. What are the common symptoms of OBDII code B108A, Start Button General Electrical Failure?
- Common symptoms include difficulty starting the vehicle, intermittent starting issues, and a non-responsive start button.
2. What are the possible causes of OBDII code B108A, Start Button General Electrical Failure?
- The code B108A can be triggered by a faulty start button, issues with the ignition system, wiring problems, or a weak car battery.
3. How can I diagnose OBDII code B108A, Start Button General Electrical Failure?
- Diagnosing this code usually involves checking the start button functionality, inspecting the ignition system, testing the battery voltage, and scanning for other related codes.
4. Can a weak car battery trigger OBDII code B108A, Start Button General Electrical Failure?
- Yes, a weak or failing car battery can cause voltage fluctuations that may trigger the B108A code due to insufficient power to the start button.
5. How can I repair OBDII code B108A, Start Button General Electrical Failure?
- Repairing this code may involve replacing the faulty start button, fixing any wiring issues, ensuring a strong battery connection, or addressing any underlying electrical problems.
6. Is it safe to continue driving with OBDII code B108A, Start Button General Electrical Failure?
- It is not recommended to drive the vehicle with this code present, as it can lead to potential starting failures and inconvenience on the road.
7. Can a DIY enthusiast fix OBDII code B108A, Start Button General Electrical Failure?
- Depending on the underlying cause, some DIY enthusiasts may be able to troubleshoot and repair this code themselves, especially if it involves simple tasks like checking the battery or replacing the start button.
8. Will resetting the OBDII code B108A, Start Button General Electrical Failure make it go away permanently?
- Resetting the code may temporarily clear it, but if the underlying issue is not fixed, the code is likely to reappear after some time.
9. Do I need a professional mechanic to diagnose OBDII code B108A, Start Button General Electrical Failure?
- While some basic troubleshooting can be done by DIYers, for a thorough diagnosis and repair, it is recommended to consult a professional mechanic with experience in automotive electrical systems.
10. Are there any preventive measures to avoid OBDII code B108A, Start Button General Electrical Failure in the future?
- Regular maintenance of the vehicle's electrical system, including checking the battery health and addressing any starting issues promptly, can help prevent the recurrence of this code.
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