AutoCodes – Ford – C1148 Ford

C1148 Ford Code - Speed Wheel Sensor RF Coherency Fault

Quick Answer

When the driver stops too fast, and one or more wheels begin to lock up, the ABS system takes over. Common causes include ABS RF Wheel Speed Sensor / Wiring intermittently open/shorted, Tone wheel cracked/slipping on hub/axle/CV shaft, Faulty / intermittent connection at the Anti-Lock Brake Control Module (ABCM or EBCM). 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: C1148 Ford indicates Speed Wheel Sensor RF Coherency Fault.
Common causes: Common causes include ABS RF Wheel Speed Sensor / Wiring intermittently open/shorted, Tone wheel cracked/slipping on hub/axle/CV shaft, Faulty / intermittent connection at the Anti-Lock Brake Control Module (ABCM or EBCM).
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 15,883

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 Aug 17, 2020

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code C1148 Ford Description

When the driver stops too fast, and one or more wheels begin to lock up, the ABS system takes over. It sees the wheel or wheels slowing down too rapidly by way of wheel speed sensors. When this happens, it shuts off brake fluid to the wheel with the inlet valve/coil, and releases the pressure with an outlet valve/coil. The Wheel Speed Sensor RF is typically found on vehicles with 4 Wheel Anti-Lock Brakes. The ABS system checks to be sure that the sensor electrical circuit is ok every time the key is turned on and the ABS module is powered up. It checks it again once vehicle speed reaches a preset speed (usually 5-15 mph).If there is a problem with the sensor or if the signal from the sensor is erratic, the ABS module will communicate over a data bus to the instrument cluster to turn on the amber Anti-Lock Light and the Red Brake Warning Light, and ABS will be disabled. In this case, the module has checked the right front wheel speed sensor/wiring and found the circuit has an electrical problem. This sets a C1148 in memory.

OBDII Code C1148 Ford - Speed Wheel Sensor RF Coherency Fault - AutoCodes.com — C1148 Ford Code - Speed Wheel Sensor RF Coherency Fault

What does this mean?

What are the Possible Causes of the DTC C1148 Ford?

ABS RF Wheel Speed Sensor / Wiring intermittently open/shorted
Tone wheel cracked/slipping on hub/axle/CV shaft
Faulty / intermittent connection at the Anti-Lock Brake Control Module (ABCM or EBCM)
Faulty Anti-Lock Brake Control Module

How to Fix the DTC C1148 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

This is typically an electrical wiring connection issue being monitored by the manufacturer.
It can occur if:
- The right front hub bearing/brake rotor is bad.
- Can also be set if scan tool software is not updated.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the C1148 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.

Need more information about the C1148 Ford code?

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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 C1148 Ford Code

1. What are the common symptoms of OBDII code C1148 in a Ford vehicle?

- Common symptoms include the ABS warning light illuminating on the dashboard, loss of traction control, and potential issues with the vehicle's stability control system.

2. What does the OBDII code C1148 Ford indicate?

- OBDII code C1148 indicates a Speed Wheel Sensor RF Coherency Fault, specifically related to the right front (RF) wheel speed sensor in the vehicle.

3. What are the possible causes of OBDII code C1148 in a Ford vehicle?

- Possible causes include a faulty right front wheel speed sensor, damaged wiring or connectors leading to the sensor, or issues with the sensor's signal not being coherent with the other wheel speed sensors.

4. How can I diagnose the Speed Wheel Sensor RF Coherency Fault with OBDII code C1148 in my Ford?

- Diagnosis typically involves inspecting the right front wheel speed sensor, checking the wiring and connectors for damage, and using a diagnostic scanner to monitor the sensor's readings compared to the other wheel speed sensors.

5. Can I still drive my Ford vehicle with OBDII code C1148 present?

- It is not recommended to drive the vehicle with OBDII code C1148 present, as it can affect the proper functioning of the ABS, traction control, and stability control systems, potentially compromising safety.

6. How can I repair OBDII code C1148 in my Ford?

- Repairing OBDII code C1148 often involves replacing the right front wheel speed sensor, repairing or replacing damaged wiring or connectors, and clearing the fault code with a diagnostic scanner.

7. Is it possible to reset the OBDII code C1148 in a Ford without fixing the underlying issue?

- While you can clear the fault code temporarily with a diagnostic scanner, it is crucial to address the underlying issue causing the Speed Wheel Sensor RF Coherency Fault to prevent further problems and ensure proper vehicle operation.

8. Can extreme weather conditions affect the occurrence of OBDII code C1148 in a Ford?

- Yes, extreme weather conditions like heavy rain, snow, or ice can potentially affect the wheel speed sensors and lead to faults like OBDII code C1148 due to interference with sensor signals.

9. How can I prevent OBDII code C1148 from occurring in my Ford in the future?

- Regularly inspecting and maintaining the wheel speed sensors, wiring, and connectors, especially after driving in harsh weather conditions, can help prevent issues like OBDII code C1148 from occurring in the future.

10. Is it necessary to visit a mechanic for OBDII code C1148 repairs, or can I fix it myself?

- While some DIY enthusiasts may be able to replace the wheel speed sensor or repair wiring themselves, it is recommended to consult a qualified mechanic for accurate diagnosis and proper repair of OBDII code C1148 to ensure safety and effectiveness.