Ford 653 Torque converter solenoid did not change states during KOER

How to read it

Code 653 reads as 6 flashes, pause, 5 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.

What does Ford code 653 mean?

Torque converter solenoid did not change states during KOER

Common causes of 653

• The TCC solenoid never changed state because the test conditions were not met
• A failed overdrive selection switch
• An open or short in the torque converter clutch circuit
• An internal fault in the PCM TCC output

How to fix 653

1. Follow the KOER test prompts so the TCC solenoid is commanded on and off
2. Check the overdrive selection switch and replace it only if it fails its own test
3. Check the torque converter clutch circuit for an open or short
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