OBD Guide
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C1404

Rear Speed Sensor Left Malfunction

C1404 is an OBD-II diagnostic trouble code meaning: Rear Speed Sensor Left Malfunction. Common causes: open or shorted wiring harness, speed sensor malfunction. Estimated repair cost: $33–89.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$33–89 (est.)

Symptoms

  • ABS/ESP indicator is on
  • Disabling the ABS system
  • Incorrect operation of the stabilization system
  • Errors in cruise control operation (if any)

Causes

  • Open or shorted wiring harness
  • Speed sensor malfunction
  • Poor contact in the sensor connector
  • Mechanical damage to the sensor
  • Problems with the ring gear on the hub

How to Fix

  1. Check the integrity of the wiring harness
  2. Inspect the sensor connector for oxidation
  3. Check the sensor resistance (compare with the norm)
  4. Clean the sensor from dirt
  5. Replace sensor if necessary
  6. Check the ring gear on the hub

Related codes

C1403C1405C1406

FAQ

What does the C1404 code mean?

C1404 is an OBD-II diagnostic trouble code that indicates: Rear Speed Sensor Left Malfunction

What causes a C1404 error code?

The most common causes of C1404 include: Open or shorted wiring harness; Speed sensor malfunction; Poor contact in the sensor connector; Mechanical damage to the sensor.

How do I fix a C1404 diagnostic trouble code?

To fix C1404: Check the integrity of the wiring harness. Inspect the sensor connector for oxidation. Check the sensor resistance (compare with the norm). For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with C1404?

Limited driving only, diagnose soon

How much does it cost to fix C1404?

The estimated repair cost for C1404 is $33–89. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat