• ABS warning light on
• Traction control light on
• Inconsistent speedometer readings
• Faulty left rear wheel speed sensor
• Damaged wiring or connectors
• Faulty ABS module
ABS: Anti-lock Braking System
DTC: Diagnostic Trouble Code
• C0040
• C0041
This code means that the car's computer thinks there's a problem with one of the wheels. It's like when you feel wobbly on a bike because one of the tires is not right.
This code indicates an issue with the left rear wheel speed sensor circuit.
C0045 is a diagnostic trouble code (DTC) for 'Left Rear Wheel Speed Sensor Circuit Malfunction'. This means the vehicle's anti-lock braking system (ABS) has detected an issue with the wheel speed sensor circuit on the left rear wheel.
• Inspect the left rear wheel speed sensor and wiring for damage.
• Check the electrical connections for corrosion or looseness.
• Test the wheel speed sensor with a multimeter for proper resistance.
• Replace the left rear wheel speed sensor.
• Repair or replace damaged wiring or connectors.
• Replace the ABS module if necessary.
• Multimeter
• OBD-II scanner
• Socket set
$150 - $400
Moderate
• Chevrolet Silverado
• GMC Sierra
• Cadillac Escalade
• Regularly inspect wheel speed sensors and wiring.
• Keep ABS components clean and free of debris.
• Perform routine maintenance checks.
Sensor Issue
• Drive cautiously as ABS may not function properly.
• Have the vehicle inspected by a professional as soon as possible.
Check if the vehicle's ABS components are covered under warranty, especially if the vehicle is relatively new.
This code has been commonly reported in vehicles with high mileage or those that frequently operate in harsh conditions.
Moderate – While the vehicle is still drivable, the ABS system may not function correctly, affecting braking performance.
Operating a vehicle with a malfunctioning ABS can increase the risk of accidents. It is advisable to address this issue promptly.
• Vehicle should be on a flat surface.
• Ensure the ignition is off before testing.
The left rear wheel speed sensor is located near the wheel hub of the left rear tire.
Q: Can I drive with a C0045 code?
A: While you can drive with this code, it's not recommended as your ABS system may not work properly, affecting braking.
Q: How do I reset the ABS light?
A: Fix the underlying issue first, then use an OBD-II scanner to clear the code. If the issue is resolved, the light should stay off.
