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 computer in the car is having trouble getting a signal from the sensor that tells how fast the back left wheel is spinning.
The P14F4 code is triggered when the vehicle's control module detects a low voltage or weak signal from the wheel speed sensor located at the rear left wheel.
The wheel speed sensor is a critical component of the ABS (Anti-lock Braking System) and traction control systems. It monitors the rotational speed of the wheel and sends this data to the vehicle's ECU (Electronic Control Unit). A 'Circuit Low' code indicates that the signal from the sensor is below the expected range, which could be due to a wiring issue, sensor failure, or connection problem.
• ABS warning light on
• Traction control light on
• Inoperative ABS or traction control
• Faulty wheel speed sensor
• Damaged or corroded wiring/connectors
• Faulty ABS module
ABS: Anti-lock Braking System
ECU: Electronic Control Unit
• Inspect the rear left wheel speed sensor and its wiring for damage.
• Check the connector for corrosion or loose connections.
• Use a multimeter to test the sensor voltage and resistance.
• Replace the faulty wheel speed sensor.
• Repair or replace damaged wiring or connectors.
• Reset the ABS system and clear the code.
• OBD-II scanner
• Multimeter
• Basic hand tools
$150 - $300
Moderate
• Toyota Camry
• Honda Accord
• Ford F-150
• Regularly inspect ABS wiring and connectors.
• Keep wheel hubs clean and free of debris.
• Ensure proper installation of wheel speed sensors.
Sensor Issue
• Avoid driving in harsh conditions that could damage sensors.
• Have regular maintenance checks to catch issues early.
Check with the vehicle manufacturer for warranty coverage on ABS components.
Historically, wheel speed sensor issues have been common in vehicles with high mileage or those frequently driven in harsh conditions.
Moderate – While the vehicle can still be driven, the ABS and traction control systems may not function properly, affecting safety.
Driving with a malfunctioning ABS system can increase stopping distances and reduce vehicle control in emergency situations.
• Vehicle parked on a level surface
• Ignition in the 'On' position
The rear left wheel speed sensor is located near the wheel hub of the left rear wheel.
Q: Can I drive with a P14F4 code?
A: While you can drive, it's not recommended as the ABS and traction control systems may not work properly.
Q: How do I know if my wheel speed sensor is bad?
A: Common signs include the ABS warning light being on and erratic speedometer readings.
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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