Wheel Speed Sensor Input Error (Right Rear)
There's a problem with the right rear wheel speed sensor signal.
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)
Your car's computer is having trouble reading how fast the right rear wheel is spinning, which it uses to help with braking and stability control.
What the computer is actually seeing
The computer sees irregular or no voltage signal from the right rear wheel speed sensor, affecting the ABS and traction control systems.
What a healthy reading looks like
Wheel speed sensor should output a varying voltage between 0-5 volts, typically around 2.5 volts at rest and increasing with 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. Inspect the wiring and connector for the right rear wheel speed sensor for any signs of damage or corrosion. Repair if necessary. Decision: If damaged, fix it; if not, move to step 2.
- 22. Use a multimeter to check the voltage at the right rear wheel speed sensor connector. Expect 0-5 volts, around 2.5 volts at rest. Decision: If voltage is abnormal, replace the sensor; if normal, move to step 3.
- 33. Check the ABS control module for any stored codes other than C0427. Specific failures may affect various functions. Decision: If unrelated codes present, diagnose those; if clear, perform step 4.
- 44. Inspect the brake fluid level and condition. Low or dirty fluid can affect the ABS operation. Decision: If low, top up and check for leaks; if okay, suspect a fault in the ABS module.
Common causes
- Damaged wiring or connectors to the right rear wheel speed sensor
- Faulty right rear wheel speed sensor
- Issues with the ABS module
- Low fluid levels in the brake system
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's generally safe for limited driving, but you may lose ABS and traction control functionality.
Will the code come back after repair?
If the underlying issue is fixed, it should not return; if the repair is not complete, it may come back.
Why is this code paired with others?
Multiple codes can indicate issues with the ABS system or its sensors, as they share data for operation.
Working a real vehicle right now?
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