What causes Ford code 94?

The torque converter clutch solenoid circuit is open or damaged. The AIR pump motor is dead or its drive belt slipped. The AIR diverter or bypass solenoid failed. A vacuum hose to the AIR system is damaged, blocked or connected wrong. The ECM cannot command the TCC or the AIR system.

How do I fix Ford code 94?

Check the wiring and connector at the torque converter clutch solenoid. Check the vacuum hoses to the AIR system for damage, a blockage or a wrong connection. Check the AIR pump motor and the AIR solenoid and replace them only if they fail their own test. Test the torque converter clutch solenoid 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 the TCC and the AIR system both work.

Ford 94 Torque converter clutch solenoid circuit failure or secondary air injection inoperative

Q: What does Ford code 94 mean?

Ford code 94. Torque converter clutch solenoid circuit failure or secondary air injection inoperative.

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

How to read it

Code 94 reads as 9 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 94 mean?

Torque converter clutch solenoid circuit failure or secondary air injection inoperative

Common causes of 94

The torque converter clutch solenoid circuit is open or damaged.
The AIR pump motor is dead or its drive belt slipped.
The AIR diverter or bypass solenoid failed.
A vacuum hose to the AIR system is damaged, blocked or connected wrong.
The ECM cannot command the TCC or the AIR system.

How to fix 94

Check the wiring and connector at the torque converter clutch solenoid.
Check the vacuum hoses to the AIR system for damage, a blockage or a wrong connection.
Check the AIR pump motor and the AIR solenoid and replace them only if they fail their own test.
Test the torque converter clutch solenoid 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 the TCC and the AIR system both work.

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. Code 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 EEC-IV trouble codes, Crown Victoria, Mustang, Taurus, Thunderbird 1992-1995 (code, fault location, 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 additional probable causes.
https://web.archive.org/web/20160502051413id_/http://www.troublecodes.net:80/ford/crown-victoria-mustang-cobralxgt-taurus-thunderbird-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 94. Include your vehicle, the issue and a source if you have one.