1996 Cadillac Deville Fault codes PO716 & PO717

1996 CADILLAC DEVILLE
65,636 MILES • V8 • FWD • AUTOMATIC
Avatar
COVERBEY
  • MEMBER
  • 3 POSTS
Smog test station reported the two fault codes listed and service engine liight resulting in a functional fail (emissions all ok) What can be done to erase computer memory long enough to pass the smog test? Thanks
Oct 14, 2009 at 5:20 PM
Advertisement
Avatar
MATHIASO
  • ✓ASE Certified Mechanic
  • 1,209 POSTS
  • ASE Certified Mechanic
it seem like you are not intersted in fixing the codes, you may need MIL Eliminator to pass the smog test .
https://www.2carpros.com/trouble_codes/obd2
Oct 14, 2009 at 6:41 PM
Avatar
COVERBEY
  • MEMBER
  • 3 POSTS
Generally available at auto parts stores???
Oct 14, 2009 at 6:55 PM
Avatar
SERVICE WRITER
  • ✓ASE Certified Mechanic
  • 9,123 POSTS
  • ASE Certified Mechanic
What are the code numbers?

What state are you in and what is the criteria in y0our state to pass/fail emission tests?
Oct 14, 2009 at 7:15 PM
Avatar
COVERBEY
  • MEMBER
  • 3 POSTS
PO716 and 717. In California.

The smog technician wrote on the order "MIL is on (2) fault codes found-see VIR. Service engine soon light is on."

The car passed the visual inspection and emmissions test but failed the functional check.

They gave me the impression, without saying outright, something could be done to "wipe out the computer memory" operate the car through a few drive cycles to reboot the computer and retake the test.

Hope this helps. Thanks
Oct 15, 2009 at 11:28 AM
Avatar
SERVICE WRITER
  • ✓ASE Certified Mechanic
  • 9,123 POSTS
  • ASE Certified Mechanic
Both codes are related to the coolant temperature sensor....probably a bad sensor.
Oct 15, 2009 at 12:00 PM
Avatar
CADILLACGURU
  • MEMBER
  • 2 POSTS
P0716 Input Speed Sensor CKT Range/Performance
P0717 Input Speed Sensor Circuit No Signal
Nov 11, 2009 at 12:24 AM
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.