B108A Mercury 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 Mercury 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 Mercury 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 Mercury?
- 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 Mercury?
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 Mercury 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 Mercury Code
1. What are the common symptoms of OBDII code B108A Mercury (Start Button General Electrical Failure)?
- Common symptoms include the inability to start the vehicle using the start button, intermittent starting issues, and potential electrical malfunctions.
2. What are the possible causes of OBDII code B108A Mercury (Start Button General Electrical Failure)?
- The code B108A Mercury can be caused by a faulty start button, issues with the vehicle's electrical system, a malfunctioning key fob, or a problem with the immobilizer system.
3. How can I diagnose the OBDII code B108A Mercury (Start Button General Electrical Failure)?
- Diagnosis typically involves using a diagnostic scanner to retrieve the specific error code, checking the start button functionality, inspecting the key fob, and examining the vehicle's electrical connections.
4. Can I still drive my vehicle with the OBDII code B108A Mercury (Start Button General Electrical Failure)?
- It is not recommended to drive the vehicle if you are experiencing issues related to the start button general electrical failure, as it may lead to further complications or safety hazards.
5. How can I repair OBDII code B108A Mercury (Start Button General Electrical Failure) on my own?
- Repair options may include checking and replacing the start button, inspecting and repairing any damaged wiring, resetting the immobilizer system, or reprogramming the key fob.
6. Is it necessary to visit a mechanic for OBDII code B108A Mercury (Start Button General Electrical Failure)?
- If you are not confident in diagnosing or repairing the issue yourself, it is recommended to seek the assistance of a qualified mechanic or automotive technician.
7. Are there any temporary solutions for the OBDII code B108A Mercury (Start Button General Electrical Failure)?
- In some cases, disconnecting the vehicle's battery for a few minutes and then reconnecting it may temporarily reset the system and alleviate the issue.
8. Can weather conditions affect the occurrence of OBDII code B108A Mercury (Start Button General Electrical Failure)?
- Extreme weather conditions such as extreme cold or heat can sometimes exacerbate electrical issues, leading to the occurrence of code B108A on Mercury vehicles.
9. How long does it typically take to repair OBDII code B108A Mercury (Start Button General Electrical Failure)?
- The repair time for code B108A can vary depending on the exact cause of the issue and the complexity of the repair needed. It may take anywhere from a few hours to a day or more.
10. Will resetting the OBDII code B108A Mercury (Start Button General Electrical Failure) make it go away permanently?
- Resetting the code may temporarily clear the error, but if the underlying issue is not addressed, the code is likely to reappear. It is important to diagnose and fix the root cause of the problem.
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