Wheel Speed Sensor 1 Circuit Range/Performance Problem
The system is detecting an issue with the first wheel speed sensor's performance.
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 measures how fast each wheel is turning. If it shows values that don't make sense compared to the other sensors or if the signal is weak, the computer flags it as a problem.
What the computer is actually seeing
The computer checks the voltage and signal frequency from the wheel speed sensor. It expects a stable signal that corresponds with wheel speed. If there's too much variation or the signal is below a specific threshold (like below 0.5 volts when the vehicle is moving), it triggers this code.
What a healthy reading looks like
When operational, you should see around 0.5 to 2.0 volts at rest and up to 5 volts when the wheel is spinning at reasonable speeds (like 30 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. Inspect wiring and connector to the wheel speed sensor for damage or corrosion. If found, repair or replace as necessary. Decision Point: Is the wiring intact?
- 22. Measure voltage at the wheel speed sensor connector with the ignition on. Expected voltage should be 5 volts. Decision Point: Is voltage present?
- 33. If voltage is present, check the actual wheel speed while driving with a scan tool. Compare to other wheel speeds. Decision Point: Do the speeds match?
- 44. If wheel speeds are inconsistent, replace the wheel speed sensor. If consistent, inspect the vehicle's ABS module. Decision Point: Do you need to replace the sensor?
Common causes
- Faulty wheel speed sensor
- Damaged wiring or connector
- Corroded connectors
- Absence of a signal due to a fault in the brake controller
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's better to fix it soon because inconsistent wheel speed readings can affect ABS and traction control.
Will the code come back after resetting it?
If the underlying problem isn't fixed, the code will reappear.
Why might this code appear with other codes?
Multiple codes can indicate a broader issue, like a failing ABS module affecting all wheel speed sensors.
Working a real vehicle right now?
Let DiagCoach walk you through it live with your specific symptoms, vehicle, and what you've already checked.
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