C1404 2016 Toyota RAV4 Code - Rear Speed Sensor Left Malfunction

C1404 indicates a malfunction in the rear left wheel speed sensor circuit, which is part of the ABS (anti-lock braking system).

Symptoms may include the ABS warning light or traction control light turning on, decreased ABS functionality, or inconsistent braking behavior.

Common causes include a faulty rear left wheel speed sensor, damaged wiring or connectors, debris around the sensor or reluctor ring, or a malfunction in the ABS module.

Inspect the rear left wheel speed sensor and its wiring for damage, check for debris around the sensor, and use a diagnostic scan tool to monitor speed sensor readings for irregularities.

While the vehicle may still be drivable, it’s unsafe as the ABS and traction control systems may not function properly, especially in slippery conditions.

Repairs may involve replacing the faulty rear left wheel speed sensor, repairing damaged wiring, cleaning the sensor area, or, in rare cases, replacing the ABS module.

Repair costs can vary, but replacing a wheel speed sensor typically costs between $150 and $300, including parts and labor.

Yes, dirt, debris, or physical damage to the reluctor ring can interfere with the wheel speed sensor’s readings and trigger the code.

Clearing the code without addressing the underlying issue will not fix the problem. The code will likely return until the malfunction is resolved.

Regularly inspect and clean the wheel speed sensors and surrounding areas, avoid driving through deep water or mud when possible, and address any ABS warning lights promptly.