Free API
P0360high severityPowertrain

Ignition Coil J Primary/Secondary Circuit Malfunction

on 2015 Kia Forte 1.8L I4 · FWD

What this code means

The PCM detected a fault in the primary or secondary circuit of ignition coil J (cylinder 10). The coil may not be firing, resulting in a misfire.

Symptoms

  • Engine misfire
  • Rough running
  • Check engine light on

Common causes

  • Faulty ignition coil
  • Damaged coil wiring or connector
  • Poor coil ground
  • Failed PCM coil driver

Diagnostic steps

  1. Scan for related misfire codes
  2. Inspect coil J connector and wiring
  3. Swap coil J with another cylinder to test
  4. Measure coil primary/secondary resistance

Other Powertrain codes on this vehicle

For shop owners
Diagnosing for customers?
Text them the estimate with photos and get approval in minutes with Auto Shop Base.
Talk to the ownerSee what's included
Built by a shop owner. Talk to Chris, not a sales rep.
🔧 Built by master technician Chris Hackleman · Master Technician · 20+ years. Spot an error? Use the Help link above — a human reads every report.
Stuck on this repair? Take it to The Diag Desk — ask a master tech about this exact car → real human answer within 24h, never AI
🔓 LIBERATED FOREVER
The 2015 Kia Forte 1.8L I4 repair data is free for every DIYer and shop on earth, permanently, because Simon-Olivier Ricci paid $99 to unlock it.
Mitchell1 charges $169/mo for this. ALLDATAdiy charges $30/yr per vehicle. Open Labor Project is free permanently, because of community sponsors like Simon-Olivier.
Free another vehicle →
Building an app?
Free API access to all this data — 10 requests/day, no card required.
Get an API key →
Run a shop?
A free website, SEO and Google reviews with your shop software. Auto Shop Base Professional, $250/mo, with our labor times on every estimate.
See what's included →