OBD Guide
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C1131

Engine Signal 2

C1131 is an OBD-II diagnostic trouble code meaning: Engine Signal 2. Common causes: broken or damaged wiring harness, sensor malfunction. Estimated repair cost: $56–167.

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

Symptoms

  • Check Engine Light Is On
  • Reduced engine efficiency
  • Problems with the passive safety system

Causes

  • Broken or damaged wiring harness
  • Sensor malfunction
  • Problems with the control module
  • Short circuit in the circuit

How to Fix

  1. Check wiring harness for damage
  2. Test the sensors in the circuit
  3. Check control module connections
  4. Replace faulty components

Related codes

C1130C1132P0600

FAQ

What does the C1131 code mean?

C1131 is an OBD-II diagnostic trouble code that indicates: Engine Signal 2

What causes a C1131 error code?

The most common causes of C1131 include: Broken or damaged wiring harness; Sensor malfunction; Problems with the control module; Short circuit in the circuit.

How do I fix a C1131 diagnostic trouble code?

To fix C1131: Check wiring harness for damage. Test the sensors in the circuit. Check control module connections. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with C1131?

Do not drive — repair immediately

How much does it cost to fix C1131?

The estimated repair cost for C1131 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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