What causes Ford code 224?

The primary circuit on ignition coils 1, 2, 3 or 4 is open or damaged. One of the ignition coils failed. The ICM cannot drive the coil primary circuits. The wiring from the ICM to the coils is damaged. The ECM sees no primary current on a coil.

How do I fix Ford code 224?

Check the wiring from the ICM to ignition coils 1 through 4 for damage. Test each ignition coil and replace any that fails its own test. Test the ICM and replace it only if it fails its own test. Test the ECM last, only after every circuit test has passed. Clear the code, then retest to confirm every coil fires.

Ford 224 PCM detected a primary circuit failure on ignition coils 1, 2, 3 or 4 (EI)

Q: What does Ford code 224 mean?

Ford code 224. PCM detected a primary circuit failure on ignition coils 1, 2, 3 or 4 (EI).

Make: Ford (1981-1995)
Category: Powertrain - Ignition
Severity: Check Engine Light

How to read it

Code 224 reads as 2 flashes, pause, 2 flashes, pause, 4 flashes on the check-engine light. Jumper the self-test input to signal return at the test connector, then run the key on engine off self test and the running self test, counting the check-engine flashes each time.

New to flash codes? The How to Read Ford EEC-IV Self-Test Codes walks through the test and what the numbers mean. The general OBD-I guide covers the rest.

What does Ford code 224 mean?

PCM detected a primary circuit failure on ignition coils 1, 2, 3 or 4 (EI)

Common causes of 224

The primary circuit on ignition coils 1, 2, 3 or 4 is open or damaged.
One of the ignition coils failed.
The ICM cannot drive the coil primary circuits.
The wiring from the ICM to the coils is damaged.
The ECM sees no primary current on a coil.

How to fix 224

Check the wiring from the ICM to ignition coils 1 through 4 for damage.
Test each ignition coil and replace any that fails its own test.
Test the ICM and replace it only if it fails its own test.
Test the ECM last, only after every circuit test has passed.
Clear the code, then retest to confirm every coil fires.

Source

Source review recorded

Sources and review

Review: checked against the recorded source material.

EEC-IV Ford trouble code table (MIL, description, type)
archived reference page (troublecodes.net via Wayback Machine)
Supports: code identity and meaning
Fetched directly. The three-digit row matches the description used in the data file.
https://web.archive.org/web/20030720231430id_/http://www.troublecodes.net:80/Ford/eec-iv.shtml
Ford trouble codes, Contour, Escort, Mustang, Probe, Taurus and Tempo 1992-1995 (code, description, probable cause)
archived reference page (troublecodes.net via Wayback Machine)
Supports: code identity and probable causes
Independent table on the same archive site with matching code identity and a probable cause column.
http://web.archive.org/web/20160501223306id_/http://www.troublecodes.net:80/ford/contour-escort-mustang-probe-taurus-tempo-1992-1995/
Ford EEC-IV trouble code table: code, fault location, probable cause (Crown Victoria, Mustang, Taurus, Thunderbird 1992-1995)
reference page (troublecodes.net)
Supports: per-code probable causes used for the page cause list and test order
Fetched 2026-09-30. The probable cause column is what the page lists, in source order, with the test order built from it.
https://www.troublecodes.net/ford/crown-victoria-mustang-cobralxgt-taurus-thunderbird-1992-1995/

Last updated 2026-10-10.

Report a correction for 224. Include your vehicle, the issue and a source if you have one.