Vehicle Speed Sensor Fault
Indicates an issue 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 speed sensor monitors how fast the vehicle is going. If it fails or has a wiring issue, the computer won't know the speed, which affects shifting and performance.
What the computer is actually seeing
The ECU expects a steady voltage signal from the vehicle speed sensor, typically between 0V (stationary) and up to 5V (maximum speed). If the signal is intermittent or out of range, a fault code is triggered.
What a healthy reading looks like
Signal voltage should vary between 0 and 5 volts based on speed, with a consistent reading expected at any given 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.
- 1Check the vehicle speed sensor wiring and connector for damage or corrosion. Repair as necessary. Decision: Is the wiring in good condition? (Yes/No)
- 2Use a multimeter to check the voltage at the vehicle speed sensor while driving. Expect between 0V to 5V. Decision: Is the voltage signal fluctuating correctly? (Yes/No)
- 3If the wiring is good and the voltage is out of range, replace the vehicle speed sensor. Decision: Has the code cleared after replacement? (Yes/No)
- 4If the code persists after sensor replacement, check the ECU for proper operation and any other related fault codes.
Common causes
- Faulty vehicle speed sensor
- Damaged wiring or connectors
- Poor ground connection
- Faulty Engine Control Unit (ECU)
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
Yes, but be aware that shifting may be affected and speedometer may not work, impacting drivability.
Will this problem come back?
It could if the underlying issue isn't fixed, like faulty wiring or a bad connector.
Why does it pair with other SPN codes?
These codes may indicate related issues affecting the speed sensor or the overall performance of the vehicle.
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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