Wheel Speed Sensor Circuit Performance Problem
There’s a fault with the wheel 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 wheel speed sensor detects how fast each wheel is spinning. If there’s a problem, it sends an incorrect reading to the ABS system, which can cause issues with braking or traction control.
What the computer is actually seeing
The ABS control module monitors the voltage and frequency pulses from each wheel speed sensor. It expects a consistent frequency that corresponds to the wheel's rotation speed. If the signals are erratic or fall out of a specified range, it triggers the code C1427.
What a healthy reading looks like
Typically, the wheel speed signals should range between 0 to 35 volts depending on the sensor type, with frequency values around 1 to 10 Hz when idle and increasing as speed builds.
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 for damage or corrosion. Fix any issues found. Decision: Is wiring intact? Yes - go to step 2. No - repair wiring and retest.
- 22. Measure the voltage at the wheel speed sensor connector with the ignition on. Expected value: 8-12 volts. Decision: Is voltage present? Yes - go to step 3. No - repair power supply circuit.
- 33. Test the wheel speed sensor resistance with a multimeter. Expected value: 1,000-2,000 ohms. Decision: Does it show correct resistance? Yes - go to step 4. No - replace wheel speed sensor.
- 44. Check the ABS module for fault codes using a scan tool. Decision: Are there additional codes related to the speed sensor? Yes - address those codes. No - further diagnosis may be needed for the ABS module.
Common causes
- Damaged or corroded wiring to the wheel speed sensor
- Faulty wheel speed sensor
- Bad ABS module
- Wheel bearing issues affecting the sensor reading
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's not recommended; it affects brake performance and traction control.
Will the code return if I clear it?
It may return if the underlying issue isn't fixed.
Why does this code pair with others?
Related codes often indicate interconnected issues, like multiple sensor failures.
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