Ford 659 High vehicle speed in park indicated

How to read it

Code 659 reads as 6 flashes, pause, 5 flashes, pause, 9 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 659 mean?

High vehicle speed in park indicated

Common causes of 659

• A transmission range sensor that reads a gear position while the lever is in park
• A misadjusted or failed park/neutral position switch
• An internal fault in the PCM range input

How to fix 659

1. Check the transmission range sensor and park/neutral switch adjustment
2. Check the range sensor circuit wiring for an open or short
3. Test the transmission range sensor and park/neutral switch and replace them only if they fail
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