Vehicle Speed Sensor Error
There’s a fault with the vehicle speed sensor or its 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 has a speed sensor that tells the computer how fast the car is going. If this sensor fails or has a problem, the computer gets incorrect information and may not know if the car is moving or not, which can lead to erratic shifting or other issues.
What the computer is actually seeing
The computer expects a voltage signal from the speed sensor in the range of 0-5 volts, corresponding to the vehicle's speed. If the voltage is out of this range or missing, the fault code sets.
What a healthy reading looks like
At a stop, expect 0 volts; at 20 mph, expect around 2.5 volts; at 60 mph, expect close to 5 volts.
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 vehicle speed sensor for damage or corrosion. Repair as needed. Decision: Are the wires intact?
- 22. Using a multimeter, test the sensor's output voltage while the vehicle is moving. Expected: 0-5 volts depending on speed. Decision: Is the output voltage within range?
- 33. Check the vehicle’s ECU for any stored fault codes and clear them. Road test the vehicle to see if the code returns. Decision: Did the code come back?
- 44. If still present, swap the speed sensor with a known good unit. Decision: Did replacing the sensor fix the issue?
Common causes
- Faulty vehicle speed sensor
- Damaged wiring or connectors in the speed sensor circuit
- Corroded terminals at the sensor or ECU
- Faulty ECU or malfunction in the vehicle's computer system
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's moderate severity. Drivability may be impacted but it's generally safe to drive unless you notice major issues such as improper shifting.
Will this code come back after clearing?
If the underlying issue isn't resolved, yes, the code will likely return.
Why does this code pair with other codes?
Multiple codes can indicate related issues in the vehicle's speed sensing system, or they may all share common causes.
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 →