Wheel Speed Sensor Signal Intermittent
The wheel speed sensor signal is fluctuating or intermittent.
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What it means (plain English)
The vehicle's computer is seeing an inconsistent signal from the wheel speed sensor, which could affect ABS and traction control functions.
What the computer is actually seeing
The computer expects a steady voltage signal from the wheel speed sensor, typically a square wave that indicates speed. It should vary with speed: 0 mph should be around 0 volts, and at 50 mph, it could be about 6 volts peak-to-peak.
What a healthy reading looks like
Voltage should be near 0V at rest and between 2-6V while moving, with a consistent frequency that corresponds to wheel speed (about 4 Hz at 10 mph).
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. Check the wiring and connector to the wheel speed sensor for damage or corrosion. Repair or replace as necessary. Decision Point: Is wiring intact? If yes, proceed. If no, repair and retest.
- 22. Measure the voltage output of the wheel speed sensor while rotating the wheel. Expected voltage is 2-6V at speed. Decision Point: Is voltage within range? If yes, proceed. If no, replace the wheel speed sensor.
- 33. Inspect the sensor and rotor for dirt or debris. Clean if necessary. Decision Point: Is sensor area clean? If yes, proceed. If no, clean and retest.
- 44. Check for related codes. If additional codes are present that indicate issues with ABS or traction control, investigate those systems further.
Common causes
- Corroded or damaged wheel speed sensor wiring
- Faulty wheel speed sensor
- Dirty sensor mating surfaces or rotor
- Faulty ABS control module
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code active?
It's drivable but may affect traction control and ABS, which could compromise safety in slippery conditions.
Will this code come back after clearing it?
If the underlying issue is not resolved, the code will likely reappear.
Why does this code often pair with C1110 or other wheel speed sensor codes?
These codes often relate to the same sensor or circuit, indicating a common issue affecting functionality.
Working a real vehicle right now?
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