Wheel Speed Sensor Signal Erratic/Intermittent
This code indicates an intermittent or erratic signal from the 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 wheel speed sensor measures how fast each wheel is spinning. If it sends an unstable signal, like a voltage reading that jumps around from 0.5V to 4.5V instead of a steady 3.0V when the wheel is turning, the computer raises this code.
What the computer is actually seeing
The ABS module sees inconsistent voltage signals from the wheel speed sensor, which should typically send a steady signal that correlates to wheel rotation speed.
What a healthy reading looks like
Normal wheel speed sensor data should typically range from 0V to 5V, depending on the vehicle speed. The expected signal for a functioning wheel speed sensor is a steady output, reflecting current wheel speed accurately without erratic fluctuations.
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 connector at the wheel speed sensor for damage, corrosion, or loose connections.
- 22. Check the wheel speed sensor circuit resistance. It should be close to manufacturer specs; typically, around 1-3 kΩ.
- 33. Measure the voltage output of the wheel speed sensor while the vehicle is in motion. It should produce a steady output signal between 0.5V and 5V based on the vehicle's speed.
- 44. If any issues are found in steps 1-3, repair the wiring or replace the sensor as needed. If all are good, suspect a faulty ABS control module.
Common causes
- Faulty wheel speed sensor
- Damaged wiring or connector at the wheel speed sensor
- Corrosion at sensor connections
- Absence of power/ground to the sensor
- Faulty ABS module
Typical repair cost
$$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
You can drive, but be cautious as the ABS may not function properly, affecting braking stability.
Will this code come back after clearing?
If the underlying issue isn't fixed, the code will likely return.
Why does this code show up with other codes?
Other codes may indicate related issues, such as problems with other sensors or the ABS system's functionality.
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