Wheel Speed Sensor Signal Intermittent
The wheel speed sensor signal is dropping out intermittently.
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 sends signals to the computer about how fast each wheel is turning. If it drops out, the system can't get accurate speed info, which can mess with traction control and ABS.
What the computer is actually seeing
The control module detects inconsistent voltage signals from the wheel speed sensor, typically ranging from 0 to 5 volts. A drop or failure in the signal can trigger the code.
What a healthy reading looks like
Wheel speed sensor voltage should be around 0.5V to 2.5V at rest, and up to 5V when the vehicle is in motion, depending on the specific system and wheel 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. Check the wiring and connector at the wheel speed sensor for any visible damage or corrosion. Repair if necessary.
- 22. Use a multimeter to check the sensor's resistance; it should be between 900-1,200 ohms. Replace the sensor if resistance is out of range.
- 33. With the scanner, monitor the wheel speed sensor data while rotating the wheel. Ensure it produces a smooth voltage change. If it drops out, replace the sensor.
- 44. Inspect for any issues with related components like the tone ring or the ABS module. Repair or replace if damaged.
Common causes
- Wiring issues (frayed/corroded wires)
- Faulty wheel speed sensor
- Poor connector connection
- Absence of wheel movement (torque relate issues in 4WD systems)
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's generally safe, but drivability features like ABS and traction control may be compromised.
Will this problem return after fixing?
If wiring and connectors are repaired or replaced correctly, it should not return.
Why does this code sometimes pair with codes like C1078?
C1079 and C1078 can both indicate problems with wheel speed sensors, and they often point to similar issues in wiring or sensor functionality.
Working a real vehicle right now?
Let DiagCoach walk you through it live with your specific symptoms, vehicle, and what you've already checked.
Start guided diagnostic →