B14F9 Ford Code - Low Side Driver 2
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
- B14F9 Ford indicates Low Side Driver 2.
- 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.
Code B14F9 Ford Description
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.
What are the Possible Causes of the DTC B14F9 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 B14F9 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.
Code Tech Notes
B14F9:12 Low Side Driver 2 Short To battery
B14F9:13 Low Side Driver 2 Open Circuit
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the B14F9 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 B14F9 Ford Code
1. What does the OBDII code B14F9 mean on a Ford vehicle?
The B14F9 code indicates an issue with the Low Side Driver 2 circuit, which typically controls certain electrical components like lighting or relays.
2. What are the common symptoms of the B14F9 code?
Symptoms may include malfunctioning lights, non-operational accessories, or warning lights on the dashboard.
3. What causes the B14F9 code to appear?
Common causes include damaged wiring, a faulty control module, a short or open circuit, or a defective component connected to the Low Side Driver 2 circuit.
4. How can I diagnose the B14F9 code?
Use a diagnostic scanner to confirm the code, inspect wiring and connectors for damage, and test the circuit for continuity or shorts.
5. Can I drive my Ford with the B14F9 code active?
While it may not cause immediate engine issues, driving with this code active can lead to malfunctioning electrical components, which could affect safety or convenience.
6. What tools do I need to repair the B14F9 code?
You’ll need a diagnostic scanner, multimeter, wiring diagrams, and possibly replacement wiring or components.
7. How do I fix the B14F9 code on my Ford?
Repairs may include replacing damaged wires, repairing loose connections, or replacing a faulty control module or component.
8. Is the B14F9 code specific to certain Ford models?
No, it can appear on various Ford models equipped with systems monitored by the Low Side Driver 2 circuit.
9. How much does it cost to repair the B14F9 code?
Costs vary depending on the root cause, but it can range from $50 for simple wiring repairs to several hundred dollars for component replacements.
10. Can the B14F9 code clear itself?
The code may clear temporarily if the issue is intermittent, but proper diagnosis and repair are needed to prevent it from returning.
Discuss the causes and fixes for B14F9 Ford OBDII Code
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