Wheel Speed Sensor Signal Failure
The wheel speed sensor is not providing a valid signal.
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 either broken or not working correctly, which means the computer can't get accurate speed readings from one of the wheels.
What the computer is actually seeing
The computer checks the wheel speed sensor signal voltage and expects to see a pulse signal that changes smoothly as the wheel turns. It looks for a specific frequency related to wheel speed, typically a square wave of about 0.5 to 5 volts with at least 5 pulses per revolution.
What a healthy reading looks like
Normal wheel speed sensor output should fluctuate between 0 and 5 volts as the wheel rotates, with a minimum of 2 volts for a valid signal and a frequency that correlates to vehicle 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.
- 11. Inspect the wiring and connectors at the wheel speed sensor. Look for frayed wires or corrosion. Decision: Is there visible damage? If yes, repair/replace the wiring. If no, proceed to step 2.
- 22. Measure the voltage output from the wheel speed sensor with the vehicle at rest and with wheels turning. Expect a voltage fluctuation between 0 and 5 volts. Decision: Are you seeing the expected voltage? If yes, go to step 3. If no, replace the sensor.
- 33. Check the ABS module for any additional stored codes. Use a scan tool to examine ABS inputs. Decision: Are there any related fault codes present? If yes, diagnose those codes first. If no, continue with the check.
- 44. Test the sensor ring for any physical damage or debris that could interfere with the sensor's detection capability. Decision: Is the sensor ring intact? If no, replace the sensor ring. If yes, check further into the ABS module.
Common causes
- Damaged wheel speed sensor
- Loose or corroded wiring/connectors
- Faulty anti-lock braking system (ABS) module
- Mechanical issues (like a stuck wheel bearing)
Typical repair cost
$$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's best to fix it soon; while it can be driven, it may affect ABS and traction control functionality.
Will the code come back after resetting?
If the issue isn't resolved, the code will likely return.
Why does this code sometimes pair with others?
It's common for multiple issues in the ABS system to trigger related codes, as they often share components.
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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