Wheel Speed Sensor Signal Missing
The system can't see the wheel speed sensor signals for one or more wheels.
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 car uses sensors to measure how fast each wheel is turning. If it can't get that info, it triggers the C1264 code.
What the computer is actually seeing
The ABS control module expects to receive wheel speed data (often around 0 to 25 mph) from each wheel sensor. If it gets no signal or an erratic signal, it triggers this code.
What a healthy reading looks like
Wheel speed sensors should output a frequency corresponding to the wheel speed, typically 0-12V at a frequency of 0-20 Hz while rolling at low speeds, increasing 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 wheel speed sensor. Look for fraying, corrosion, or looseness. If damaged, repair/replace the wiring or connector. Decision: If repairs were made and still no signal, move to step 2.
- 22. Check the output from the wheel speed sensor with a multimeter. You should see a pulsing voltage signal as the wheel turns. Typically, there should be around 0-12V as the wheel turns. Decision: If there's no signal, replace the wheel speed sensor. If there is a signal, move to step 3.
- 33. Inspect the ABS control module connections and wiring. Check for any signs of damage or corrosion. Decision: If ok, consider testing or replacing the ABS module.
Common causes
- Faulty wheel speed sensor
- Damaged wiring or connector to the sensor
- Corroded or loose connections at the ABS module
- Faulty ABS control module
Typical repair cost
$$$
Related codes
Frequently asked questions
Can I drive my vehicle with this code?
Yes, but it may affect ABS function and could lead to longer stopping distances.
Will this problem come back after fixing?
If the underlying issue (like damaged wiring) isn't resolved, it's likely to return.
Why does this code appear with other ABS codes?
Often a malfunction in one speed sensor can affect others; they share the same control module.
Working a real vehicle right now?
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