Faulty Wheel Speed Sensor Circuit Input
Indicates a problem with the wheel speed sensor circuit.
Heads up: this code wasn't in our hand-written library yet, so DiagCoach AI built this page on the fly. Double-check critical specs against service info before condemning parts.
What it means (plain English)
The wheel speed sensor is responsible for detecting how fast each wheel is turning. If the sensor or its circuit is faulty, the system can't determine wheel speed correctly.
What the computer is actually seeing
The computer sees no valid signal from the wheel speed sensor circuit, typically resulting in a flat voltage reading (around 0 volts) when it should be receiving variable voltage depending on wheel rotation.
What a healthy reading looks like
Normally around 0.5 to 4.5 volts depending on the wheel speed, varying as the wheel turns.
Guided diagnostic — the DiagCoach way
Don't just throw parts at it. Walk through these in order — each step tells you whether to keep going or stop and fix what you found.
- 11. Inspect the wheel speed sensor wiring and connectors for damage or corrosion. If found, repair or replace the wiring/connectors. Decision: Go to Step 2 if no issues are found or after repair.
- 22. Measure the voltage at the wheel speed sensor connector with the key on, engine off. Expected 0.5 to 4.5 volts. Decision: If voltage is present, replace the wheel speed sensor. If not, go to Step 3.
- 33. Check the continuity of the wiring between the wheel speed sensor and the ABS module with a multimeter. Expected continuity. Decision: If continuity is good, replace the ABS module. If no continuity, repair the wiring.
Common causes
- Damaged wheel speed sensor
- Corroded connectors or wiring
- Faulty ABS module or computer
- Brake fluid contamination affecting sensors
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's drivable, but without accurate wheel speed data, stability control and ABS functions may be impaired.
Will this issue come back after repair?
If the wiring and sensor are fixed correctly, the code shouldn't return.
Why do I see this code with other sensor codes?
This code can pair with other wheel speed sensor faults if multiple sensors or the ABS system are affected.
Working a real vehicle right now?
Let DiagCoach walk you through it live with your specific symptoms, vehicle, and what you've already checked.
Start guided diagnostic →