C05A3
Wheel Speed Sensors Supply Circuit High
Wheel speed sensors supply voltage above expected range. Wheel-speed signals feed ABS, ESC, traction control, transmission and odometer — a single dropped signal disables all of these safety functions until repaired.
Wheel speed sensors supply voltage above expected range. 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 shorted to battery
One of the most commonly reported causes for this code — check this first.
Typical part cost: $60-660
- low
Connector pins corroded - high contact resistance
Less common, but worth ruling out after the more likely causes.
Typical part cost: $60-660
See all causes + fix costs
Create a free Wrenchify account to unlock the rest for C05A3.
Unlock causesFree forever · No credit card
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.
Get the full step-by-step diagnosis
Create a free Wrenchify account to unlock the rest for C05A3.
Unlock diagnosisFree forever · No credit card
Related codes
See related trouble codes
Create a free Wrenchify account to unlock the rest for C05A3.
Unlock related codesFree forever · No credit card
Frequently asked questions
What does C05A3 mean?
C05A3 means "Wheel Speed Sensors Supply Circuit High". It is a generic OBD-II code that points to a fault in the chassis.
What are the most common causes of C05A3?
supply shorted to battery; connector pins corroded - high contact resistance; supply wire pinched against b+ source — 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.
Get the full C05A3 diagnosis for your vehicle
Year, make, model + step-by-step repair help — free plan included.