Vehicle Speed Sensor Malfunction
This code indicates a problem 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 measures how fast the car is going. If it fails, your car's computer doesn't know your speed, which can cause issues with shifting or stability systems.
What the computer is actually seeing
The computer expects to see a voltage signal from the speed sensor between 0.5V and 3.5V as vehicle speed changes. If the signal is missing or outside of this range, it throws C1244.
What a healthy reading looks like
0.5V to 3.5V signal from the speed sensor with vehicle motion, ideally varying consistently with 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 at the vehicle speed sensor for damage or corrosion. Repair as needed. Decision point: If wiring/connectors are good, proceed. If not, fix them and retest.
- 22. Use a multimeter to measure the voltage at the vehicle speed sensor connector with the vehicle in motion. Expected: 0.5V to 3.5V. Decision point: If you're getting a valid signal, proceed. If not, replace the speed sensor.
- 33. Check for any other related DTCs, especially in the ABS or transmission control modules. Decision point: If related codes are present, address those systems.
- 44. If the problem persists, inspect the ABS module for faults or try swapping with a known good one if possible. Decision point: If replacing the ABS module resolves the issue, that's your fix.
Common causes
- Faulty vehicle speed sensor
- Damaged wiring or connectors
- Faulty ABS module
- Poor ground connection
- Tire size mismatches affecting speed readings
Typical repair cost
$$
Related codes
Frequently asked questions
Can I drive my vehicle with this code?
Yes, but you may experience issues with shifting and stability control. It's best to repair it soon.
Will this code come back after I clear it?
If the underlying issue isn't fixed, the code will likely return after driving the vehicle.
Why does this code sometimes pair with transmission problems?
The vehicle speed sensor also provides input for the transmission control module. If it fails, it can affect shifting behavior.
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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