Ignition Coil Secondary Circuit Failure
Findings, check these first
- Failed secondary winding
- Shorted plug wire
- Severely fouled plugs
- Cracked coil housing
- Terminal corrosion
Standard procedure
- 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
Code lookup
Type a code above, or start from a symptom or a common code.
Press / to jump to the box. Ford-enhanced powertrain, body, chassis and network codes. Generic P0xxx codes live on OBD Codes List.
Sources and review
Review: checked against the recorded source material.
- OBDII.pro: P1365 Ford definition
live reference page (obdii.pro)
Supports: Ford-family meaning for P1365: Ignition Coil Secondary Circuit Failure
Fetched directly. obdii.pro is a publisher independent of the engine-codes family.
- P1365 FORD Code: Meaning, Causes, and Symptoms | OBD2 Codes
live reference page (obd2-codes.co)
Supports: Ford meaning for P1365: Ignition Coil Secondary Circuit Failure
Fetched directly. obd2-codes.co phrasing matches the engine-codes family, so it counts as one publisher.
Last updated 2026-09-05.
Report a correction for P1365. Include your vehicle, the issue and a source if you have one.
This fault is part of the Ford fuel and ignition codes guide. It covers the family and the order to check it.