Ford 93 Throttle position sensor input low or converter clutch solenoid circuit failure
How to read it
Code 93 reads as 9 flashes, pause, 3 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 93 mean?
Throttle position sensor input low or converter clutch solenoid circuit failure
Common causes of 93
- Faulty throttle position sensor at idle
- Open or shorted throttle position sensor wiring
- Faulty converter clutch solenoid
- Open or shorted clutch circuit wiring
- PCM output fault
How to fix 93
- Confirm the code and decide whether it points to throttle or transmission
- Check the throttle position sensor signal at idle
- Inspect the converter clutch solenoid wiring
- Repair wiring before replacing parts
- Replace a failed part only after the circuit tests
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/
Last updated 2026-09-25.
Report a correction for 93. Include your vehicle, the issue and a source if you have one.