Wheel Speed Sensor 1 Input Circuit Range/Performance Problem
This code indicates an issue with the input signal from the first wheel speed sensor.
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 first wheel speed sensor isn't sending the correct data to the computer. This could mean it's broken or there's a problem with the wiring.
What the computer is actually seeing
The ABS control module is receiving inconsistent or no signal from the wheel speed sensor, typically reading values that are outside the expected range for that wheel at speeds above 5 mph.
What a healthy reading looks like
Normal wheel speed sensor readings should be between 0-5 volts DC for a typical sensor, and match the vehicle speed closely, especially during movement.
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 wiring and connectors to the wheel speed sensor for damage or corrosion. Repair if necessary. Decision Point: Is wiring intact? If yes, proceed.
- 22. Measure the voltage at the wheel speed sensor while the vehicle is moving at low speeds. Expected: 1-5 volts. Decision Point: Is the voltage in range? If yes, sensor is likely fine; if no, replace the sensor.
- 33. Clear the code and test drive the vehicle to see if the fault returns. Decision Point: Does the code return? If yes, further investigate the ABS control module or related components.
Common causes
- Damaged wheel speed sensor
- Shorted or frayed wiring
- Corroded connectors
- Faulty ABS control module
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's generally safe to drive, but you may experience issues with traction control and ABS functions, which can affect handling in slippery conditions.
Will this problem come back after resetting the code?
If the underlying issue isn't fixed, the code will likely return.
Why does this code pair with others like C1037?
They often indicate similar issues in the wheel speed sensor system, suggesting a common wiring or sensor problem.
Working a real vehicle right now?
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