Wheel Speed Sensor 4 Circuit Failure
The system detected a failure in the wheel speed sensor 4 circuit.
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 computer sees that the signal from one of the wheel speed sensors is missing or erratic, which could be due to a faulty sensor, broken wire, or connector issue.
What the computer is actually seeing
The vehicle's computer expects a voltage signal ranging from 0 to 5 volts that indicates the speed of the wheel. If it doesn’t see this signal (like 0 volts consistently) or sees erratic readings (like jumping between 0-5 volts), it triggers this fault code.
What a healthy reading looks like
Expected voltage readings from the wheel speed sensor should fluctuate between approximately 0-5 volts based on the wheel's 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 for the wheel speed sensor 4. Look for corrosion, breaks, or loose connections.
- 2 - Decision: If wiring is damaged or corroded, repair it and clear the code. If wiring looks good, proceed to step 2.
- 32. Measure the voltage at the sensor connector while the vehicle is moving. The voltage should fluctuate between 0-5 volts.
- 4 - Decision: If there is no voltage or a constant reading of 0 volts, replace the wheel speed sensor. If you have proper voltage, proceed to step 3.
- 53. Check the ABS module for fault codes related to wheel speed sensors.
- 6 - Decision: If additional codes are present, follow up on those specific codes. If no other codes exist, it may indicate a need for further diagnosis of the ABS module.
Common causes
- Faulty wheel speed sensor
- Damaged wire or connector in the sensor circuit
- Faulty ABS module
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code active?
It's generally safe but you may experience issues with your ABS and traction control, so drive cautiously and fix it soon.
Will this code come back after clearing it?
If the underlying issue isn't resolved, yes, the code will likely return.
Why does this code sometimes appear with other related codes?
Multiple codes can indicate issues with other sensors or the ABS module that's affecting the entire system.
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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