1996 Cadillac Deville Fault codes PO716 & PO717

Tiny
COVERBEY
  • MEMBER
  • 1996 CADILLAC DEVILLE
  • V8
  • FWD
  • AUTOMATIC
  • 65,636 MILES
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
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Wednesday, October 14th, 2009 AT 5:20 PM

6 Replies

Tiny
MATHIASO
  • EXPERT
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
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Wednesday, October 14th, 2009 AT 6:41 PM
Tiny
COVERBEY
  • MEMBER
Generally available at auto parts stores?
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Wednesday, October 14th, 2009 AT 6:55 PM
Tiny
SERVICE WRITER
  • EXPERT
What are the code numbers?

What state are you in and what is the criteria in y0our state to pass/fail emission tests?
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Wednesday, October 14th, 2009 AT 7:15 PM
Tiny
COVERBEY
  • MEMBER
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
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Thursday, October 15th, 2009 AT 11:28 AM
Tiny
SERVICE WRITER
  • EXPERT
Both codes are related to the coolant temperature sensor. Probably a bad sensor.
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Thursday, October 15th, 2009 AT 12:00 PM
Tiny
CADILLACGURU
  • MEMBER
P0716 Input Speed Sensor CKT Range/Performance
P0717 Input Speed Sensor Circuit No Signal
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Wednesday, November 11th, 2009 AT 12:24 AM

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