Ford 627 Torque converter clutch solenoid circuit failure

How to read it

Code 627 reads as 6 flashes, pause, 2 flashes, pause, 7 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.

What does Ford code 627 mean?

Torque converter clutch solenoid circuit failure

Common causes of 627

• An open or short in the TCC solenoid circuit
• A failed TCC solenoid
• A poor connection at the transmission connector for the TCC solenoid
• An internal fault in the PCM TCC driver

How to fix 627

1. Check the TCC solenoid circuit wiring for an open or short
2. Check the transmission connector pins for the TCC solenoid for corrosion or a poor fit
3. Test the TCC solenoid and replace it only if it fails its own test
4. Test the PCM last, only after every circuit test has passed
5. Clear the code, then retest to confirm the fix holds

Source

Qualified source review