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's computer is confused about how the right rear wheel is turning. It's like when you spin a toy wheel and it doesn't know which way it's going.
The vehicle's ABS system detected an implausible signal from the right rear wheel speed sensor, indicating a problem with the direction of rotation data.
The C1233 code is triggered when the ABS module receives a signal from the right rear wheel speed sensor that does not match the expected direction of rotation. This could be due to a faulty sensor, wiring issues, or a problem with the wheel bearing or hub assembly.
• ABS warning light on
• Traction control system may be disabled
• Inconsistent braking performance
• Faulty right rear wheel speed sensor
• Damaged wiring or connector issues
• Faulty wheel bearing or hub assembly
ABS: Anti-lock Braking System
OBD-II: On-Board Diagnostics, Second Generation
• Inspect the right rear wheel speed sensor and wiring for damage.
• Check the wheel bearing and hub assembly for play or damage.
• Use a diagnostic scanner to read live data from the wheel speed sensor.
• Replace the right rear wheel speed sensor if faulty.
• Repair or replace damaged wiring or connectors.
• Replace the wheel bearing or hub assembly if necessary.
• OBD-II scanner
• Multimeter
• Socket set
$100 - $300
Moderate
• Ford Explorer
• Chevrolet Tahoe
• Toyota Camry
• Regularly inspect wheel speed sensors and wiring.
• Ensure wheel bearings are in good condition.
• Avoid driving through deep water that could damage sensors.
Sensor Issue
• Drive cautiously if the ABS light is on.
• Get the vehicle checked by a professional as soon as possible.
Check with your vehicle manufacturer for warranty coverage on ABS components.
This code has been more common in vehicles with higher mileage or those frequently driven in harsh conditions.
Moderate – While the vehicle may still be drivable, the ABS system may not function properly, which can affect braking performance.
Driving with a malfunctioning ABS system can increase stopping distances and reduce vehicle control in emergency situations.
• Vehicle must be driven to allow the ABS system to monitor wheel speed.
• The issue may only present itself under certain driving conditions, such as during turns or braking.
The right rear wheel speed sensor is located near the wheel hub of the right rear wheel.
Q: Can I drive with the C1233 code?
A: While you can drive with this code, it's not recommended because the ABS system may not work properly, affecting braking safety.
Q: How do I reset the ABS light after fixing the issue?
A: After repairs, use an OBD-II scanner to clear the code and reset the ABS light.
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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