Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means that the car is having trouble reading how fast the back wheels are spinning. It's like if your bike's speedometer wasn't working right.
The C05F4 code indicates an issue with the rear drive shaft speed sensor's ability to accurately read or report the speed of the drive shaft.
The rear drive shaft speed sensor is responsible for providing the vehicle's control modules with information about the rotational speed of the drive shaft. This data is crucial for systems like ABS and traction control. The C05F4 code is triggered when the sensor's signal is out of expected range or inconsistent with other vehicle speed data.
• ABS warning light on
• Traction control light on
• Inaccurate speedometer readings
• Faulty rear drive shaft speed sensor
• Damaged or corroded wiring/connectors
• Malfunctioning control module
ABS: Anti-lock Braking System
OBD-II: On-Board Diagnostics, Second Generation
• Inspect the rear drive shaft speed sensor for damage.
• Check wiring and connectors for corrosion or damage.
• Use a multimeter to test the sensor's output.
• Replace the rear drive shaft speed sensor.
• Repair or replace damaged wiring/connectors.
• Reprogram or replace the control module if necessary.
• OBD-II scanner
• Multimeter
• Socket set
$150 - $400
Moderate
• Chevrolet Silverado
• GMC Sierra
• Ford F-150
• Regularly inspect and clean sensor connections.
• Avoid driving through deep water or mud.
• Schedule routine maintenance checks.
Sensor Issue
• Do not ignore the ABS or traction control lights.
• Seek professional diagnosis if unsure about repairs.
Check with your vehicle manufacturer for specific warranty coverage on sensors and electrical components.
This code has been reported in vehicles with high mileage or those frequently used in off-road conditions.
Moderate – While the vehicle can still be driven, it's important to address this issue to maintain optimal safety features.
Driving with a malfunctioning speed sensor can affect safety systems like ABS and traction control, potentially increasing the risk of an accident.
• Vehicle should be on a flat surface.
• Ensure the vehicle is in a safe, controlled environment.
The rear drive shaft speed sensor is typically located near the rear differential on the drive shaft.
Q: Can I drive with a C05F4 code?
A: While you can drive, it's not recommended as it may affect safety systems like ABS and traction control.
Q: How do I reset the C05F4 code?
A: After fixing the issue, use an OBD-II scanner to clear the code.
Pro · Four-system diagnostics
A handheld scanner aimed at engine, transmission, ABS, and airbag diagnostic work.
Chassis and ABS faults usually need a scanner that can read brake-system data directly.
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Universal · Torque wrench
Useful when reassembly torque matters for wheel, suspension, and under-hood fasteners.
Useful when wheel, hub, or suspension hardware needs correct reassembly torque.
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Universal · Drive-on ramps
Helpful for safer access underneath the vehicle during exhaust, EVAP, and underbody inspection work.
Helpful for safer access during underbody inspection work.
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