Wheel Speed Sensor Input Error
There is an issue detected with the wheel speed sensor 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 car's system isn't getting the right signals from the wheel speed sensor, which helps with functions like ABS and traction control.
What the computer is actually seeing
The control module looks for a consistent voltage or frequency signal from the wheel speed sensor. If the signal is erratic or missing (usually under 0.5 volts for an active sensor), it triggers this code.
What a healthy reading looks like
Normal operation should show a steady voltage between 0.5V and 5V from the sensor as vehicle speed increases; should be roughly equal at all four wheels.
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 and connectors. Look for any visible damage.
- 2Test the voltage at the wheel speed sensor connector with the key on but engine off. You should see 5V reference voltage if it's an active sensor.
- 3Check the resistance of the sensor. It should be between 900 to 1200 ohms; if it reads open or short, replace it.
- 4Look at the signal output while spinning the wheel—should produce a frequency signal. If it's not, replace the sensor or fix the wiring as needed.
Common causes
- Damaged wiring to the wheel speed sensor
- Faulty wheel speed sensor
- Corroded or loose electrical connector
- Issues with the ABS control module
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's not recommended. The issue can affect your ABS and traction control systems.
Will this code come back after clearing it?
If the root cause isn't fixed, it likely will.
Why does this code appear with other codes like C1451?
Different codes can indicate problems in the same system, such as multiple wheel speed sensors malfunctioning.
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