OBD Guide
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C1943

Front Vehicle Speed Signal

C1943 is an OBD-II diagnostic trouble code meaning: Front Vehicle Speed Signal. Common causes: front wheel speed sensor malfunction, broken wiring harness. Estimated repair cost: $56–167.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$56–167 (est.)

Symptoms

  • Incorrect ABS operation
  • Problems with the stabilization system
  • The CHECK ENGINE lamp comes on.

Causes

  • Front wheel speed sensor malfunction
  • Broken wiring harness
  • Problems with the control unit

How to Fix

  1. Diagnostics of the status of speed sensors
  2. Checking the integrity of the wiring harness
  3. Testing the operation of the control unit
  4. Replacing faulty components

Related codes

C1944C1945

FAQ

What does the C1943 code mean?

C1943 is an OBD-II diagnostic trouble code that indicates: Front Vehicle Speed Signal

What causes a C1943 error code?

The most common causes of C1943 include: Front wheel speed sensor malfunction; Broken wiring harness; Problems with the control unit.

How do I fix a C1943 diagnostic trouble code?

To fix C1943: Diagnostics of the status of speed sensors. Checking the integrity of the wiring harness. Testing the operation of the control unit. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with C1943?

Limited driving only, diagnose soon

How much does it cost to fix C1943?

The estimated repair cost for C1943 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat