C0666

Right Rear Wheel Speed Sensor B Circuit/Open

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$33–111 (est.)

Symptoms

The ABS, ESP or stabilization system warning light is on
Disabling the ABS or ESP system
Incorrect operation of cruise control
Errors in related systems

Causes

Broken or damaged wiring harness to the sensor
Poor contact in the sensor connector
Malfunction of the wheel speed sensor itself
Damage to the gear rotor (comb) on the hub
Problems with the ABS ECU

How to Fix

Check the integrity of the wiring harness to the sensor
Inspect connectors for oxidation or damage
Check sensor resistance (must meet specification)
Clean the sensor and gear rotor from dirt
Replacing a faulty speed sensor
Check the operation of the system after repair

Related codes

C0665 C0667 C0668 C0035 C0036