AutoCodes – Ford – B102F Ford

B102F Ford Code - Auxiliary Switch Signal Erratic

Quick Answer

The Body Control Module (BCM) monitors the Auxiliary Switch. Common causes include Faulty Auxiliary Switch, Auxiliary Switch harness is open or shorted, Auxiliary Switch circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
B102F Ford indicates Auxiliary Switch Signal Erratic.
Common causes
Common causes include Faulty Auxiliary Switch, Auxiliary Switch harness is open or shorted, Auxiliary Switch circuit poor electrical connection.
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
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Code Popularity 1,903
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Mar 11, 2021
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Code B102F Ford Description

The Body Control Module (BCM) monitors the Auxiliary Switch. The BCM sets the OBDII code when the Auxiliary Switch is not to factory specifications.
OBDII Code B102F Ford - Auxiliary Switch Signal Erratic - AutoCodes.com
B102F Ford Code - Auxiliary Switch Signal Erratic

What are the Possible Causes of the DTC B102F Ford?

  • Faulty Auxiliary Switch
  • Auxiliary Switch harness is open or shorted
  • Auxiliary Switch circuit poor electrical connection
  • Faulty Body Control Module (BCM)

How to Fix the DTC B102F 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 B102F 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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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about B102F Ford Code

1. What are the common symptoms of OBDII code B102F Ford (Auxiliary Switch Signal Erratic)?

- Common symptoms include intermittent or erratic behavior of auxiliary switches, such as unresponsive controls or unexpected activation of accessories.

2. What could cause the OBDII code B102F Ford to trigger?

- The code B102F Ford is typically triggered by a faulty auxiliary switch, wiring issues, or a malfunction in the auxiliary switch control module.

3. How can I diagnose the cause of OBDII code B102F Ford?

- Diagnose the code by checking the wiring connections of the auxiliary switches, testing the auxiliary switch control module, and inspecting for any physical damage or corrosion in the system.

4. Can a DIYer repair OBDII code B102F Ford at home?

- Depending on your skill level, you may be able to repair the issue by replacing the faulty auxiliary switch, repairing any damaged wiring, or resetting the auxiliary switch control module.

5. Is it safe to continue driving with OBDII code B102F Ford active?

- It is generally not recommended to drive with the code active, as it can lead to potential safety hazards or further damage to the auxiliary switch system.

6. How much does it cost to fix OBDII code B102F Ford at a repair shop?

- The cost of fixing the code can vary depending on the specific cause of the issue, but it may range from $100 to $300 for parts and labor.

7. Are there any preventive measures to avoid triggering OBDII code B102F Ford?

- Regularly inspecting and maintaining the auxiliary switches, wiring, and control module can help prevent the code from being triggered due to wear and tear.

8. Can OBDII code B102F Ford affect other systems in the vehicle?

- While the code is specific to the auxiliary switch signal, it can potentially impact the overall electrical system of the vehicle if left unresolved.

9. Will disconnecting the battery reset OBDII code B102F Ford?

- Disconnecting the battery may temporarily clear the code, but it is recommended to diagnose and repair the underlying issue to prevent the code from reoccurring.

10. Does OBDII code B102F Ford require professional reprogramming after repair?

- In some cases, reprogramming of the auxiliary switch control module may be necessary after repair to ensure proper functionality and to clear the code permanently.

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