trouble code PO717

1971 PONTIAC GRAND AM
Avatar
MIKE1965
  • MEMBER
  • 1 POST
2002 Pont Grand Am 58,000 4 cyl 2.2 ecotec automatic trans

the car has hard up shift hooked up obd2 scan tool trouble coe PO 717 come up. Car up till that time car drove and shifted fine. Need more information on what to do?

Thanks,
Mike
Aug 16, 2007 at 8:08 PM
Advertisement
Avatar
SERVICE WRITER
  • ✓ASE Certified Mechanic
  • 9,123 POSTS
  • ASE Certified Mechanic
The computer issn't getting a correct speed signal from the ISS (Input speed sensor). IT may be a wiring issue, bad pcm or bad ISS as the likely causes. Most likely the ISS is bad. If the connectors at the pcm and the iss look okay and no obvious wiring damage is there, the sensor is where I would go. IT looks like the transaxle has to be pulled to access it. This may not be a fun thing, I would look hard at the wiring side of it. There is a procedure for testing the iss, but a scan tool the can read its output is needed. You may be able to compare the ohms of a new one and back probe the old to compare them...not sure on that though. Here is the location:


https://images.2carpros.com/forum/automotive_pictures/30961_iss_1.jpg

Aug 16, 2007 at 8:39 PM
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.
Ask a Free Question
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.