OBD Guide
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C1794

Front Speed Sensor Right Circuit Malfunction

C1794 is an OBD-II diagnostic trouble code meaning: Front Speed Sensor Right Circuit Malfunction. Common causes: open or short circuit in the sensor circuit, malfunction of the speed sensor itself. Estimated repair cost: $56–167.

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

Symptoms

  • ABS/ESP indicator is on
  • The stabilization system does not work correctly
  • The emergency mode of the braking system is activated

Causes

  • Open or short circuit in the sensor circuit
  • Malfunction of the speed sensor itself
  • Damaged wiring harness or connector
  • Grounding problems
  • Malfunction of the ABS/ESP control unit

How to Fix

  1. Check the integrity of the sensor wires and connectors
  2. Measure sensor resistance (must meet specification)
  3. Check circuit grounding
  4. Scan the system for additional errors
  5. Replace sensor or wiring harness if necessary

Related codes

C1795C1796C1793

FAQ

What does the C1794 code mean?

C1794 is an OBD-II diagnostic trouble code that indicates: Front Speed Sensor Right Circuit Malfunction

What causes a C1794 error code?

The most common causes of C1794 include: Open or short circuit in the sensor circuit; Malfunction of the speed sensor itself; Damaged wiring harness or connector; Grounding problems.

How do I fix a C1794 diagnostic trouble code?

To fix C1794: Check the integrity of the sensor wires and connectors. Measure sensor resistance (must meet specification). Check circuit grounding. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with C1794?

Limited driving only, diagnose soon

How much does it cost to fix C1794?

The estimated repair cost for C1794 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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