OBD Guide
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C1313

Open In Main Relay 2 Circuit

C1313 is an OBD-II diagnostic trouble code meaning: Open In Main Relay 2 Circuit. Common causes: broken wires in the relay circuit, main relay 2 fault. Estimated repair cost: $56–167.

Severity
🔴 High
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$56–167 (est.)

Symptoms

  • Engine won't start
  • Unstable engine operation
  • No power in some systems
  • Check Engine light comes on

Causes

  • Broken wires in the relay circuit
  • Main relay 2 fault
  • Corrosion or poor contact in connectors
  • Blown fuse
  • Wiring harness damage

How to Fix

  1. Check the condition of main relay 2
  2. Check the integrity of the relay circuit
  3. Inspect contacts and connectors for corrosion
  4. Check the fuses associated with the relay circuit
  5. If necessary, replace the relay or wires

Related codes

P0627P0685P0688

FAQ

What does the C1313 code mean?

C1313 is an OBD-II diagnostic trouble code that indicates: Open In Main Relay 2 Circuit

What causes a C1313 error code?

The most common causes of C1313 include: Broken wires in the relay circuit; Main relay 2 fault; Corrosion or poor contact in connectors; Blown fuse.

How do I fix a C1313 diagnostic trouble code?

To fix C1313: Check the condition of main relay 2. Check the integrity of the relay circuit. Inspect contacts and connectors for corrosion. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with C1313?

Yes, but get it checked soon

How much does it cost to fix C1313?

The estimated repair cost for C1313 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat