Wheel Speed Sensor Signal Missing
The system cannot detect a wheel speed signal from a specific wheel 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 vehicle's computer isn't getting the speed reading from one of the wheel sensors. This can mess with systems like ABS and traction control.
What the computer is actually seeing
The ABS control module expects to receive a wheel speed signal, typically a square wave voltage signal varying from 0 to around 12V, depending on the wheel's rotation speed. If it doesn’t get this signal, it registers the code.
What a healthy reading looks like
Signal should be a square wave between 0V (stationary) to 12V (high speed), with around 1-2 Hz at low speeds, increasing linearly with speed.
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.
- 1Inspect the wheel speed sensor wiring for damage or corrosion.
- 2Check the connectors for proper connection and continuity. Repair or replace as necessary.
- 3Inspect the tone ring for cracks or debris; clean or replace if damaged.
- 4Measure the voltage signal at the wheel speed sensor when the wheel is turning. You should see a fluctuating voltage between 0-12V. If you don’t, replace the sensor.
- 5If the sensor tests good, check the ABS control module for any faults; it may need reprogramming or replacement.
Common causes
- Broken or damaged wheel speed sensor
- Corroded or broken wiring/connectors
- Faulty ABS control module
- Physical obstruction or dirt on the sensor or tone ring
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's usually drivable, but you'll lose traction control and ABS functions, so drive with caution.
Will the code come back after clearing it?
If the underlying issue isn’t fixed, yes, it will likely return.
How does this code affect my truck's performance?
It impacts systems related to braking and traction, which are critical in slippery conditions.
Working a real vehicle right now?
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