Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
The car's computer thinks the left back wheel is spinning faster than it should be. It's like when one wheel on your toy car spins much faster than the others.
The vehicle's ABS (Anti-lock Braking System) has detected that the left rear wheel speed sensor is reporting a speed that is higher than expected compared to the other wheels.
The C1222 code indicates an anomaly where the left rear wheel speed sensor is reporting a speed that exceeds the expected threshold. This could be due to a malfunction in the sensor itself, a wiring issue, or an actual mechanical problem with the wheel or tire.
• ABS warning light on
• Traction control light on
• Inconsistent braking performance
• Faulty wheel speed sensor
• Damaged or corroded wiring/connectors
• Wheel bearing issues
ABS: Anti-lock Braking System
OBD-II: On-Board Diagnostics, second generation
• Check for any other related codes.
• Inspect the left rear wheel speed sensor and its wiring.
• Test the sensor's electrical output with a multimeter.
• Replace the faulty wheel speed sensor.
• Repair or replace damaged wiring or connectors.
• Inspect and replace the wheel bearing if necessary.
• OBD-II scanner
• Multimeter
• Socket set
$100 - $300
Moderate
• Toyota Camry
• Honda Accord
• Ford Fusion
• Regularly inspect wheel speed sensors and wiring.
• Ensure wheel bearings are in good condition.
• Avoid driving through deep water or mud.
Sensor Issue
• Do not ignore the ABS warning light.
• Drive carefully until the issue is resolved.
Check with your vehicle manufacturer for warranty coverage on ABS components.
This code has been commonly reported in vehicles with high mileage or those frequently driven in harsh conditions.
Moderate – While the vehicle is still drivable, braking performance may be compromised.
Driving with a malfunctioning ABS system can reduce braking efficiency and increase stopping distances, especially in wet or slippery conditions.
• Vehicle on a lift or jack stands
• Ignition in the 'on' position without starting the engine
The left rear wheel speed sensor is located at the left rear wheel hub assembly.
Q: Can I drive with a C1222 code?
A: It's possible to drive, but it's not recommended as braking performance may be affected.
Q: How do I reset the ABS light?
A: Fix the underlying issue first, then 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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