Vehicle Speed Sensor Range/Performance Problem
The vehicle speed sensor signal is out of range or missing.
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 computer relies on a sensor to determine how fast the vehicle is going. If the sensor isn't working right, the speed reading can be incorrect or completely missing, which affects things like transmission shifting.
What the computer is actually seeing
The engine control module (ECM) expects a certain voltage input from the vehicle speed sensor (VSS), typically around 0 to 5 volts. If it sees a value below 0.5 volts or above 4.5 volts, or no signal at all, it sets this code.
What a healthy reading looks like
VSS should output approximately 2 to 4 volts for 40 MPH. The signal should switch between high (usually around 5V) and low (close to 0V) rapidly, around 4-20 Hz based on 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.
- 11. Inspect the wiring and connectors leading to the vehicle speed sensor for any damage or corrosion. Decision Point: Are the connections clean and intact? If no, repair or replace as needed.
- 22. Check the vehicle speed sensor (VSS) resistance. Unplug it and measure resistance across the terminals; it should be between 400-2000 ohms. Decision Point: Is the resistance within specs? If no, replace the sensor.
- 33. Test the VSS signal with a multimeter while the vehicle is in motion. You should see the voltage fluctuate between 0.5V and 5V as the vehicle moves. Decision Point: Is the signal within range? If no, check for wiring issues or replace the sensor.
- 44. If all checks are good, use a scan tool to check for any other codes and confirm the ECM operation. Decision Point: Are there other codes present? If yes, diagnose those codes first.
Common causes
- Faulty vehicle speed sensor
- Broken or damaged wiring
- Corroded connectors
- Faulty transmission output speed sensor
- ECM software issue
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's moderate severity, so you can drive, but you may experience transmission issues or incorrect speed readings.
Will this code come back?
If the underlying issue isn't fixed, yes, it'll likely reappear after clearing it.
Why does this code sometimes pair with other codes?
Other codes can indicate related issues, like transmission problems or additional sensor faults.
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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