OBD Guide
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C1401

Front Speed Sensor Right Malfunction

C1401 is an OBD-II diagnostic trouble code meaning: Front Speed Sensor Right Malfunction. Common causes: speed sensor damage, open or shorted wiring harness. Estimated repair cost: $56–167.

Severity
⚠️ Medium
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$56–167 (est.)

Symptoms

  • ABS/ESP indicator lights up
  • Incorrect operation of ABS or ESP
  • Loss of speed signal on dashboard

Causes

  • Speed sensor damage
  • Open or shorted wiring harness
  • Problems with sensor connectors
  • Malfunction of the ABS/ESP control unit

How to Fix

  1. Check the speed sensor for damage
  2. Check wiring harness and connectors
  3. Measure the sensor resistance (must meet specification)
  4. If necessary, replace the sensor or repair the harness
  5. Reset the error and check the system operation

Related codes

C1400C1402C1403

FAQ

What does the C1401 code mean?

C1401 is an OBD-II diagnostic trouble code that indicates: Front Speed Sensor Right Malfunction

What causes a C1401 error code?

The most common causes of C1401 include: Speed sensor damage; Open or shorted wiring harness; Problems with sensor connectors; Malfunction of the ABS/ESP control unit.

How do I fix a C1401 diagnostic trouble code?

To fix C1401: Check the speed sensor for damage. Check wiring harness and connectors. Measure the sensor resistance (must meet specification). For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with C1401?

Do not drive — repair immediately

How much does it cost to fix C1401?

The estimated repair cost for C1401 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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