Vehicle Speed Sensor Failure
This code indicates a failure in the vehicle speed sensor 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 vehicle speed sensor measures how fast the car is moving. If it fails, the computer can't tell your speed accurately, which can mess up other systems like the ABS.
What the computer is actually seeing
The vehicle's computer expects to receive a consistent signal from the speed sensor, usually around 0-12 volts when at rest, increasing with speed.
What a healthy reading looks like
The speed sensor should report a voltage close to 0 volts at 0 mph, with a linear increase up to 5 volts or more at higher speeds depending on the vehicle.
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 damage or corrosion. Correct any visible issues.
- 22. Check the speed sensor resistance with a multimeter. Expected range typically 400-1200 ohms. If out of range, replace the sensor.
- 33. Verify the voltage at the connector with the ignition on (engine off). Should read 5 volts; if not, check the power supply to the sensor.
- 44. If wiring and sensor seem okay, scan and clear all DTCs, then take a test drive. If the code returns, the vehicle’s harness or ECM may be faulty.
Common causes
- Wiring issues in the speed sensor circuit
- Faulty speed sensor
- Poor connections at the sensor or ECM
- ABS module malfunction
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's drivable, but you may experience issues with traction control and ABS functions.
Will this code come back after reset?
If the underlying issue isn't fixed, yes. It will likely reappear after some driving.
Why does this code often appear with ABS codes?
The speed sensor is crucial for both systems; failure affects the ability to manage brakes and stability properly.
Working a real vehicle right now?
Let DiagCoach walk you through it live with your specific symptoms, vehicle, and what you've already checked.
Start guided diagnostic →