AutoCodes – Ford – B14FA Ford

B14FA Ford Code - Low Side Driver 3

Quick Answer

The Upfitter Interface Module utilizes a Field Effect Transistor (FET) protective circuit strategy to protect the low and high side driver output circuits. Common causes include Faulty Upfitter Interface Module, Upfitter Interface Module harness is open or shorted, Upfitter Interface Module 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: B14FA Ford indicates Low Side Driver 3.
Common causes: Common causes include Faulty Upfitter Interface Module, Upfitter Interface Module harness is open or shorted, Upfitter Interface Module 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 693

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Apr 23, 2019

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code B14FA Ford Description

The Upfitter Interface Module utilizes a Field Effect Transistor (FET) protective circuit strategy to protect the low and high side driver output circuits. Output loads (current levels) are monitored for excessive current (which is typically caused by a short circuit to ground) and are shut down (turns off the voltage or ground provided by the module) when a fault is detected.
A short to battery voltage occurring on either a low or high side driver output circuit may also result in a temporarily loss of operation in the output circuit (no voltage or ground will be applied to the output circuit) to protect the module against a potential over temperature condition.
A Field Effect Transistor (FET) is a type of transistor that the module uses to control and monitor current flow on module output circuits. The Field Effect Transistor (FET) protection strategy prevents damage from occurring to the module.
Whenever a FET is turned off because of a fault condition a Diagnostic Trouble Code (DTC) is set in the module which corresponds to the specific fault observed. The module resets the Field Effect Transistor (FET) protection and allows the circuit to function when the fault is corrected or the ignition is cycled off and then back on. The ignition should always be cycled from off to on after a fault is corrected to ensure that FET protection is reset.

OBDII Code B14FA Ford - Low Side Driver 3 - AutoCodes.com — B14FA Ford Code - Low Side Driver 3

What does this mean?

What are the Possible Causes of the DTC B14FA Ford?

Faulty Upfitter Interface Module
Upfitter Interface Module harness is open or shorted
Upfitter Interface Module circuit poor electrical connection

How to Fix the DTC B14FA 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 does this mean?

Code Tech Notes

B14FA:11 Low Side Driver 3 Short To Ground
B14FA:12 Low Side Driver 3 Short To battery
B14FA:13 Low Side Driver 3 Open Circuit

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B14FA 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 B14FA Ford Code

1. What are the common symptoms of OBDII code B14FA Ford - Low Side Driver 3?

The common symptoms of this code may include issues with the operation of certain vehicle components controlled by the Low Side Driver 3 module, such as malfunctioning lights or electrical systems.

2. What are the possible causes of OBDII code B14FA Ford - Low Side Driver 3?

Possible causes of this code include wiring issues, a faulty Low Side Driver 3 module, a short circuit, or a damaged electrical connection related to the affected component.

3. How can I diagnose OBDII code B14FA Ford - Low Side Driver 3?

Diagnosing this code typically involves using a diagnostic scanner to read the trouble codes, checking the affected component for any visible damage, inspecting the wiring and connections for faults, and testing the Low Side Driver 3 module for proper functionality.

4. Can I still drive my vehicle with OBDII code B14FA Ford - Low Side Driver 3?

It is not recommended to drive your vehicle with unresolved OBDII codes, as it may lead to further damage or safety hazards. It's best to address the issue promptly to avoid potential problems.

5. How can I repair OBDII code B14FA Ford - Low Side Driver 3?

Repairing this code may involve replacing the faulty Low Side Driver 3 module, repairing or replacing damaged wiring or connections, addressing any short circuits, and ensuring proper functioning of the affected component.

6. Is OBDII code B14FA Ford - Low Side Driver 3 a serious issue?

While this code may not always indicate a critical problem, it is essential to address it to maintain the proper operation of your vehicle's electrical systems and components controlled by the Low Side Driver 3 module.

7. Can a DIY enthusiast fix OBDII code B14FA Ford - Low Side Driver 3?

Depending on your skill level and experience with automotive repairs, you may be able to diagnose and repair this code yourself. However, if you are unsure or inexperienced, it's best to seek assistance from a professional mechanic.

8. How much does it cost to repair OBDII code B14FA Ford - Low Side Driver 3?

The cost of repairing this code can vary depending on the specific issue causing it, the parts needed for repair, and labor charges. It's advisable to obtain quotes from repair shops to determine the exact cost.

9. Will resetting the OBDII code B14FA Ford - Low Side Driver 3 make it go away permanently?

Resetting the code may temporarily clear the warning light, but if the underlying issue causing the code is not addressed, it is likely to return. It's crucial to diagnose and fix the root cause of the problem.

10. How can I prevent OBDII code B14FA Ford - Low Side Driver 3 from recurring?

To prevent this code from recurring, regularly inspect and maintain your vehicle's electrical system, check for any signs of wiring damage, address issues promptly, and follow the manufacturer's recommended maintenance schedule.