Vehicle Speed Sensor Circuit Failure
This code indicates a problem with 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 tells the engine control module how fast the car is going. If there's a problem, the computer can't get this information, which can affect how the engine performs.
What the computer is actually seeing
The computer expects a voltage signal between 0.5V to 4.5V from the speed sensor depending on the vehicle speed. If the signal is constant or out of this range, it triggers the code.
What a healthy reading looks like
Speed sensor should output a varying voltage signal reflecting vehicle speed between 0.5V (0 mph) and 4.5V (full 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 wiring and connectors at the speed sensor for damage or corrosion. Clear codes and see if it returns.
- 2Use a multimeter to measure the voltage signal at the speed sensor while the vehicle is moving. It should vary between 0.5V-4.5V. If it's flat or wrong, replace the sensor.
- 3Inspect the vehicle speed sensor itself for physical damage or failure. If you installed a new sensor before and it's still giving a code, check the wiring.
- 4Finally, check the ECM for faults if the sensor and wiring are good; it may be sending incorrect signals.
Common causes
- Faulty vehicle speed sensor
- Wiring issues in the speed sensor circuit
- Faulty engine control module (ECM)
- Poor connections or corroded connectors
Typical repair cost
$$$
Related codes
Frequently asked questions
Can I drive my vehicle with this code?
You can drive it, but you'll notice issues with speedometer accuracy and potentially transmission shifting problems.
Will the code come back after clearing it?
If the underlying issue isn't fixed, yes, the code will likely return.
Why is this code paired with other codes?
Other codes may be related to different systems affected by the lack of accurate speed information, like transmission control.
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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