B14F8 Code - Low Side Driver 1
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
- B14F8 indicates Low Side Driver 1.
- 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 B14F8 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 B14F8?
- Faulty Upfitter Interface Module
- Upfitter Interface Module harness is open or shorted
- Upfitter Interface Module circuit poor electrical connection
How to Fix the DTC B14F8?
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
B14F8:12 Low Side Driver 1 Short To battery
B14F8:13 Low Side Driver 1 Open Circuit
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the B14F8 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
- B14F8 Ford — Low Side Driver 1
Frequently Asked Questions about B14F8 Code
1. What does the OBDII code B14F8 mean?
The B14F8 code indicates an issue with Low Side Driver 1, which refers to a circuit responsible for controlling specific components in the vehicle, such as relays or actuators.
2. What are the common symptoms of code B14F8?
Common symptoms include malfunctioning electrical components, warning lights on the dashboard, or intermittent operation of the associated system.
3. What causes the B14F8 code to appear?
Typical causes include a short circuit, open circuit, damaged wiring, a faulty control module, or a malfunctioning component connected to Low Side Driver 1.
4. How do I diagnose the B14F8 code?
Diagnosis involves using a multimeter to check for continuity and shorts in the circuit, inspecting wiring and connectors, and testing the related component and control module.
5. Can I still drive my car with the B14F8 code?
While the car may still be drivable, ignoring this code can lead to malfunctions in critical systems, so it’s best to address it promptly.
6. How do I fix the B14F8 code?
Repairs may include fixing or replacing damaged wiring, repairing connectors, or replacing the faulty control module or connected component.
7. Is the B14F8 code related to a specific vehicle system?
Yes, the code typically pertains to a system controlled by the Low Side Driver 1 circuit, such as lighting, HVAC, or auxiliary systems, depending on the vehicle.
8. Can a blown fuse cause the B14F8 code?
Yes, a blown fuse in the affected circuit can interrupt power and trigger the B14F8 code.
9. How much does it cost to repair the B14F8 code?
The repair cost depends on the issue’s cause, ranging from $50 for wiring repairs to several hundred dollars for component or module replacement.
10. Do I need a professional mechanic to fix the B14F8 code?
While some issues like inspecting wiring can be done DIY, professional assistance is recommended for complex diagnostics or module programming.
Discuss the causes and fixes for B14F8 OBDII Code
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