AutoCodes – Generic – C1148

C1148 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 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 26,328

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
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

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

What does this mean?

What are the Possible Causes of the DTC C1148?

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?

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 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 code?

Need more information on how to fix the C1148 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the C1148 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

C1148 Ford — Speed Wheel Sensor RF Coherency Fault
C1148 Infiniti — Switch-Over Solenoid Valve Line USV
C1148 Lincoln — Speed Wheel Sensor RF Coherency Fault
C1148 Mazda — Right Front ABS Wheel Speed Sensor/Sensor Rotor
C1148 Mercury — Speed Wheel Sensor RF Coherency Fault
C1148 Nissan — Switch-Over Solenoid Valve Line USV

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 Code

1. What are the common symptoms of OBDII code C1148?

The common symptoms of OBDII code C1148, Speed Wheel Sensor RF Coherency Fault, include issues with the vehicle's ABS system, traction control system, and potential illumination of the ABS warning light on the dashboard.

2. What can cause the OBDII code C1148 to trigger?

The OBDII code C1148 can be triggered by a faulty or damaged right front (RF) wheel speed sensor or issues with the sensor's wiring or connections.

3. How can I diagnose the cause of OBDII code C1148?

To diagnose the cause of OBDII code C1148, you can use a diagnostic scanner to read the fault codes, inspect the right front wheel speed sensor and its wiring for any visible damage, and perform a thorough visual inspection of the sensor and its connections.

4. Can a dirty wheel speed sensor cause OBDII code C1148 to be set?

Yes, a dirty right front wheel speed sensor can cause OBDII code C1148 to be set. It is important to keep the sensor clean and free from debris to ensure accurate readings.

5. What are the repair options for OBDII code C1148?

Repair options for OBDII code C1148 may include cleaning or replacing the right front wheel speed sensor, repairing any damaged wiring or connections, and clearing the fault codes with a diagnostic scanner.

6. Is it safe to drive with OBDII code C1148 active?

It is not recommended to drive with OBDII code C1148 active, as it indicates a fault in the right front wheel speed sensor that can affect the vehicle's ABS and traction control systems, potentially compromising safety.

7. How much does it typically cost to repair OBDII code C1148?

The cost to repair OBDII code C1148 can vary depending on the underlying cause, but it may range from $100 to $300 for parts and labor if a sensor replacement or wiring repair is needed.

8. Can I reset OBDII code C1148 on my own?

You can attempt to reset OBDII code C1148 on your own using a diagnostic scanner capable of clearing fault codes. However, it is essential to address the root cause of the code to prevent it from reoccurring.

9. Are there any DIY tips for troubleshooting OBDII code C1148?

DIY tips for troubleshooting OBDII code C1148 include visually inspecting the right front wheel speed sensor and its connections for damage, cleaning the sensor to remove any dirt or debris, and checking the sensor's wiring for continuity.

10. How long does it typically take to repair OBDII code C1148?

The repair time for OBDII code C1148 can vary depending on the exact cause and the complexity of the repair needed. In general, it may take anywhere from 1 to 3 hours to diagnose and fix the issue.