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heitzman

P0717 ISS Speed Sensor Code

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Hello everyone I am new to the forum so here we go. I have a 1996 Sedan Deville with 113000 miles on it, I just baught this and it had a service engine light on and a service transmission display across the dash when I bought it. I took it into the shop to have the transmission serviced ($140) and to have the codes ran, the shop said they could not communicate with the PCM and would have to look into it. Well after about a hour of labor they found 3 ground wires either cut or disconnected for some odd reason, they put new ground wires on and told me that I had a PO717 code which is the Vehicle Speed Sensor, I went to an auto part store and got one ($15) and put it on, I cleared the code and drove it tell it fully warmed up and then the service engine light came back on and the service transmission displayed across the dash. I am getting a slight spark when I connect the battery up, do you think I might have an electrical problem or what??? I tried to look around under the car in the driveway but I didnt see nothing unussual. PLEASE HELP and thanks for your time.

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Input/ Turbine Speed Sensor Circuit No Signal, does this mean I have a bad wire or PCM issue? Please help

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It means the sensor is not responding as expected. So could be the sensor, or the wiring to the sensor, or the connections.


Bruce

2016 Cadillac ATS-V gray/black; 2013 Cadillac ATS 2L Turbo Premium (Wife's)

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I corrected the title of this thread, a title of "WHAT DOES THIS MEAN", means NOTHIHG to someone searching or looking at this thread, please be more descriptive

I also removed all of the ????????????, and simply placed one ?, drama is unneeded, cars break down

I had the P0717 ISS speed sensor code, is that the code you are getting? or is it a different code you do not specify

The ISS speed sensor is deep inside the tranny side pan, replacing it is not a BASIC do it yourself job, unless you are an advanced mechanic. You might attempt to clean and reset the tranny plug first. Let us know specifically what code you are getting


Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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Sorry, The code I am getting is a PO717 and I have 113000 miles, the shifts are smooth untill the car gets fully warmed up and then it fills like a shift kit has been installed. I bought this car knowing that there were issues, I took it into the shop when I first bought it and had the tranny serviced thinking this might take care of the service transmission displayed across the dash. Come to find out there was three ground wires not connected for some odd reason and the PCM would not communicate with the shops scanners so after a hour worth of labor of connecting the grounds back we had communication. I am wondering if there could be more wires damaged and wondering how three ground wires could get disconnected.

I am also getting a spark when I reconnect the battery, is this normal ?

How does the tranny drain plug come into play with this problem ?

Sorry, I am new to the forum and any help is greatly appreciated. Thanks

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If in fact you are showing the P0717 code it means

P0717 - Input Speed Sensor Circuit Low Input

You said, NO SIGNAL, the code is LOW INPUT. I had a 96 Deville and have noticed that a bunch of 96s seem to get this code, unless its my imagination.

You are correct, when this code sets the PCM defaults to a default line pressure and the shifts are noticable, like a shift kit. When the PCM no longer has this sensor to determine shaft speed it utilizes the VSS or vehicle speed sensor instead, a nice backup

Sometimes tranny fluid gets into the plug and can cause problems or the contacts can get corroded, before getting the job done or tearing into the tranny, it makes sense to pull the plug apart and clean the contacts with electrical contact cleaner. If there is a bad connection, maybe you can clear it up, by cleaning and resetting the pin contacts.

Here is my thread for repair of this code, Welcome Aboard, let us know if you have any questions. By the way, I drove my car with this code for over a year resetting my dash so the annoying message went away, once I replaced the sensor, the code was gone and the tranny was awesome. I replaced a lot of parts when I did mine.

http://caddyinfo.ipb...showtopic=13481&


Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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Try pulling the codes yourself. '96 was the crossover year from OBDI to OBDII. If you find a code that is not here http://myweb.accessus.net/~090/dtcobd2.html then it should be here http://myweb.accessus.net/~090/dtcobd1.html

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I have merged these two threads, they were parallel threads and needed combining.

Ranger your post #7 is extraineous now because this member has the code in his other thread, if you want I can delete your post, Mike


Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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Yes its a PO717 code, no signal was when I didnt have a ground.

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I am having the Deville's electrical system checked out and I should have an answer Thursday. I will keep everyone updated. Thanks

Edited by heitzman

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I am having the Deville's electrical system checked out and I should have an answer Thursday. I will keep everyone updated. Thanks

Good Luck


Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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no resistance, no reading from the ISS. Wire harness?

Please give more details, how was the test done, who did it, was it done at the plug (I assume)


Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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Aamco Transmission did the test and yes the test was done at the end of the short harness that comes out of the tranny.I asked if they checked the harness and they said no.

How does this harness come out, I have tried to take it out and it wants to slip back in the transmission slightly.

Aamco also wants $1,300 for labor only to dig into the tranny side pan and they will let me know how much more when they get into it (sensors, gaskets etc.) Certified Transmission didnt want to bother with trouble shooting and wanted to charge me $2900 for a new tranny. Thanks again.

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That harness is connected to EVERY electrical sensor and solenoid in the tranny.

DO NOT, I repeat DO NOT, use AAMCO, you have been warned, STAY the hell away from them, I guarentee you, you will need a new tranny with them, they WILL NOT just fix what is wrong.

Ask around, find a good shop


Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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I looked under the vehicle when I got it home and it doesnt seem that anything has been moved around.

Is it possible for me to get that harness out to check it or am I out of luck with that?

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Dont worry, I am not going to use Aamco after today, there is kind of a lack of trust issue now. I called Broome Cadillac today and if I need them to do the job they will charge me $1500 but I just want to be sure that the sensor is the problem and not the external harness to the tranny.

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Its not likely that you could see anything disturbed by aamco as an indication that they did something. $1500 for that job is what I was quoted by Cadillac. Its not an easy job they must tilt the engine carriage to get at the side pan.

You might have the pressure and TCC solenoids replaced at the same time since they are in the side pan


Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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Its in the shop. The ISS, Harness and Pressure selonoid are being replaced.

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Its in the shop. The ISS, Harness and Pressure selonoid are being replaced.

If you can, replace the TCC solenoid also, good luck


Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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Thanks BODYBYFISHER, I will relay the info. How much is the TCC selonoid?

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Thanks BODYBYFISHER, I will relay the info. How much is the TCC selonoid?

According to Rockauto, the TCC Pressure Solenoid is $33. It is smart for them to replace it while they are there. Also make sure they replace all gaskets/seals along the way, but I am sure they will do so if they are prudent mechanics

Its a good idea that you are replacing the harness also, they tend to leak

Let us know how it turns out


Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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Yes, the mechanic said they were going to replace all gaskets that were involved. My harness was wicking tranny fluid pretty bad. Thanks again

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....My harness was wicking tranny fluid pretty bad.

Harmless.

Oils, including transmission fluids, do not conduct electricity. In fact, the transformer that supplies 240 V, 60 Hz electrical power to your residence is oil-filled for heat absorption.

I hope you are back on the road and trouble-free after the transmission repairs. Many happy future miles with your 1996 model.


Jim

Drive your car.

Use your cell phone.

CHOOSE ONE !

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True Jim, while it is harmless, it it still leaking, and after I did all of that work, I still left tranny fluid on the driveway from the harness, I regretted not replacing the harness


Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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