Speed Sensor Circuit Malfunction
There’s a problem in the 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 speed sensor measures how fast the vehicle is moving. If it's not working, the computer can't get a good reading, which can affect features like traction control or speedometer accuracy.
What the computer is actually seeing
The vehicle control module (VCM) is looking for a consistent voltage signal from the speed sensor. When the sensor is malfunctioning, you might see erratic voltage readings or no signal at all.
What a healthy reading looks like
Expected voltage at the speed sensor signal wire is around 0.5V to 5V, depending on vehicle 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 for damage or corrosion in the speed sensor circuit. If you find issues, repair or replace the wiring/connectors as needed.
- 22. Check the voltage at the speed sensor connector with the ignition on. You should see a voltage reading between 0.5V and 5V. If there's no voltage, go to step 3. If voltage is present, the sensor is likely faulty—replace it.
- 33. Test the speed sensor itself using a multimeter. Check the resistance; it should typically be within the manufacturer’s specified range (often around 400-1200 ohms). If the reading is out of range, replace the speed sensor.
- 44. If the sensor tests okay, check the VCM for fault codes or issues indicating it can't process input from the speed sensor.
Common causes
- Damaged wiring or connectors in the speed sensor circuit
- Faulty speed sensor
- Corrosion in the connector
- Malfunctioning vehicle control module (VCM)
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's moderate severity. It could affect your speedometer and traction control, so fix it soon but you can drive it for a short time.
Will this problem come back after I fix it?
If you resolve the underlying issue with the wiring or sensor, it shouldn’t come back unless there's a new fault.
Why does it pair with code C0118?
C0118 indicates a different problem in the speed sensor circuit. They can show together because both codes can stem from similar wiring issues.
Working a real vehicle right now?
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