P1365 Ignition Coil Secondary Circuit Failure
What does P1365 mean on a Ford?
P1365 — Ignition Coil Secondary Circuit Failure. This Ford-enhanced code applies to F-150, Mustang, Ranger, Explorer.
Common causes of P1365
- Failed secondary winding
- Shorted plug wire
- Severely fouled plugs
- Cracked coil housing
- Terminal corrosion
How to fix P1365
- Inspect all wires and plugs
- Test secondary resistance per tower
- Look for housing cracks
- Replace wires and plugs as maintenance
- Replace the coil if secondary fails