OBD Guide
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P1365

Ignition Coil Secondary Circuit Failure

P1365 is an OBD-II diagnostic trouble code meaning: Ignition Coil Secondary Circuit Failure. Common causes: faulty ignition coil, damaged high voltage wires. Estimated repair cost: $17–89.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$17–89 (est.)

Symptoms

  • Misfire in one or more cylinders
  • Unstable engine idling
  • Reduced engine power
  • Increased fuel consumption
  • Difficulty starting the engine

Causes

  • Faulty ignition coil
  • Damaged high voltage wires
  • Worn or faulty spark plugs
  • Poor contact in the ignition coil connectors
  • Engine control module (ECU) malfunction

How to Fix

  1. Check the condition of the spark plugs and replace if necessary.
  2. Inspect high voltage wires for damage
  3. Check the resistance of the ignition coil
  4. Check the contacts in the ignition coil connectors
  5. If necessary, replace the ignition coil

Related codes

P0351P0352P0353P0354

Error P1365 by Vehicle Brand

BMWBuickCadillacChevroletChryslerFordGMGMCJaguarLincolnMazdaMercuryOldsmobileSaturnVolkswagen

FAQ

What does the P1365 code mean?

P1365 is an OBD-II diagnostic trouble code that indicates: Ignition Coil Secondary Circuit Failure

What causes a P1365 error code?

The most common causes of P1365 include: Faulty ignition coil; Damaged high voltage wires; Worn or faulty spark plugs; Poor contact in the ignition coil connectors.

How do I fix a P1365 diagnostic trouble code?

To fix P1365: Check the condition of the spark plugs and replace if necessary.. Inspect high voltage wires for damage. Check the resistance of the ignition coil. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P1365?

Limited driving only, diagnose soon

How much does it cost to fix P1365?

The estimated repair cost for P1365 is $17–89. Actual cost depends on your vehicle, location, and labor rates.

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