C0038
Left Rear Wheel Speed Sensor Supply
Fault on left rear wheel speed sensor supply circuit. Wheel-speed signals feed ABS, ESC, traction control, transmission and odometer — a single dropped signal disables all of these safety functions until repaired.
Fault on left rear wheel speed sensor supply circuit. Wheel-speed signals feed ABS, ESC, traction control, transmission and odometer — a single dropped signal disables all of these safety functions until repaired.
Common causes
- high
Supply wiring fault
One of the most commonly reported causes for this code — check this first.
Typical part cost: $70-440
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First things to check
- 1Confirm the code with a scan tool and check for additional related codes.
- 2Inspect the relevant sensors, wiring, and connectors for damage or corrosion.
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Related codes
See related trouble codes
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Frequently asked questions
What does C0038 mean?
C0038 means "Left Rear Wheel Speed Sensor Supply". It is a generic OBD-II code that points to a fault in the chassis.
What are the most common causes of C0038?
supply wiring fault — these are the most commonly reported causes. Verify with a proper diagnosis before replacing parts, or use the Wrenchify app for a vehicle-specific diagnosis.
Can I keep driving with this code?
This code can put the vehicle into limp or reduced-power mode. Avoid extended driving and have the vehicle diagnosed promptly. Use the Wrenchify app for a full diagnosis specific to your vehicle.
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