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C0122moderate severity✨ AI-generated

Wheel Speed Sensor Front Right Circuit Malfunction

There's a problem with the front right 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 car is trying to figure out how fast each wheel is turning, but it can't get a reliable reading from the front right wheel speed sensor, which is important for things like ABS and traction control.

What the computer is actually seeing

The ABS control module expects a voltage signal from the front right wheel speed sensor. When it's working, you should see a varying signal voltage between 0.5 to 5 volts as the wheel turns. If the sensor is faulty or the circuit is damaged, the module may see a constant voltage below 0.5 volts or an open circuit.

What a healthy reading looks like

0.5 to 5 volts for a functioning wheel speed sensor; expect a fluctuation compared to vehicle 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.

  1. 11. Inspect the wiring and connector for the front right wheel speed sensor. Look for frays, breaks, or corrosion. If anything looks damaged, repair it and retest.
  2. 22. Measure the voltage at the wheel speed sensor connector while the vehicle is in motion. You should see a voltage between 0.5 to 5 volts. If the voltage is not within this range, proceed to the next step.
  3. 33. Check the resistance of the wheel speed sensor using a multimeter. The expected resistance is typically between 1,200 to 2,500 ohms. If it’s outside this range, replace the sensor.
  4. 44. Confirm that the ABS control module is functioning properly—scan for additional codes that might indicate module issues. If other codes appear, address those first before replacing the module.

Common causes

  • Faulty front right wheel speed sensor
  • Damaged wiring or connectors
  • Corrosion at the connector
  • Faulty ABS control module

Typical repair cost

$$$

Related codes

Frequently asked questions

Can I drive the vehicle with this code?

Yes, but be cautious. You'll lose ABS and traction control, which could affect vehicle handling in slippery conditions.

Is this code likely to come back after repair?

If you fix the wiring or replace the faulty sensor, it should not come back if there are no further underlying issues.

Why does this code pair with C0110?

C0110 often indicates a problem with the ABS system's communication; if there's an issue with wheel speed signals from any wheel, it can trigger multiple codes.

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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