Vehicle Speed Sensor Circuit Failure
The vehicle's speed sensor circuit is malfunctioning.
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 speed sensor tells the computer how fast the car is going. If it fails, the car may not shift properly or the speedometer may not work right.
What the computer is actually seeing
The computer expects a voltage signal from the speed sensor. A typical functioning sensor sends signals between 0.5 to 4.5 volts based on vehicle speed. If the voltage drops below 0.2 volts or spikes above 5 volts, it's flagged as a fault.
What a healthy reading looks like
0.5 to 4.5 volts when vehicle is moving; 0 volts when stationary.
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's speed sensor connector and wiring for damage or corrosion. Repair as needed. Decision: Is the wiring intact? If YES, proceed. If NO, repair the wiring.
- 2Test the voltage at the speed sensor connector with the vehicle running. It should read between 0.5 to 4.5 volts. Decision: Is the reading within range? If YES, proceed to the next step. If NO, replace the speed sensor.
- 3Check if there are other codes present that could affect the speed sensor operation. Decision: Are there additional fault codes? If YES, diagnose those. If NO, check the PCM for faults.
Common causes
- Damaged wiring or connectors in the speed sensor circuit
- Faulty speed sensor
- Issues in the vehicle's computer module (PCM)
- Bad ground connection
- Wheel speed sensor malfunction
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
Yes, but expect poor shifting and possible speedometer failure. Fix it when convenient.
Will this code come back after I clear it?
It may if the underlying issue isn't fixed, such as a bad sensor or wiring problem.
Why does this code pair with other codes?
These codes can indicate related failures in the vehicle's speed and transmission control systems.
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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