OBD Guide
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C1331

Open In Front Speed Sensor Left

C1331 is an OBD-II diagnostic trouble code meaning: Open In Front Speed Sensor Left. Common causes: broken wiring harness, poor contact in the sensor connector. 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
  • Unstable operation of the ABS system
  • Lost speed data on dashboard

Causes

  • Broken wiring harness
  • Poor contact in the sensor connector
  • Speed sensor malfunction
  • Damage to wiring due to corrosion or mechanical stress

How to Fix

  1. Check the integrity of the sensor wiring harness
  2. Clean the contacts of the sensor connector
  3. Check sensor resistance (must meet manufacturer's specifications)
  4. Replace the speed sensor if necessary

Related codes

C1332C1333C1334

FAQ

What does the C1331 code mean?

C1331 is an OBD-II diagnostic trouble code that indicates: Open In Front Speed Sensor Left

What causes a C1331 error code?

The most common causes of C1331 include: Broken wiring harness; Poor contact in the sensor connector; Speed sensor malfunction; Damage to wiring due to corrosion or mechanical stress.

How do I fix a C1331 diagnostic trouble code?

To fix C1331: Check the integrity of the sensor wiring harness. Clean the contacts of the sensor connector. Check sensor resistance (must meet manufacturer's specifications). For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with C1331?

Limited driving only, diagnose soon

How much does it cost to fix C1331?

The estimated repair cost for C1331 is $33–89. Actual cost depends on your vehicle, location, and labor rates.

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