What is this code?

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Dec 23, 2005 | 09:31 PM

droopwv

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Burning Brakes

Joined: Jun 2005

Posts: 772

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From: Tobyhanna Pennsylvania

What is this code?

Check engine light came on. Giving this code P1817. Can anyone tell me what this code means? Thanks.

Last edited by droopwv; Dec 23, 2005 at 10:26 PM.

Dec 23, 2005 | 09:40 PM

screw991le

Race Director

Joined: Sep 2004

Posts: 17,786

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From: Redsox, Pats, Celts & Bruins !!! Redsox Nation !!!

St. Jude Donor '06-'07-'08-'09-'10-'11-'12

http://www.corvettedoctor.com/2004_DTC_Codes_Page2.html

Dec 23, 2005 | 10:12 PM

droopwv

Thread Starter

Burning Brakes

Joined: Jun 2005

Posts: 772

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From: Tobyhanna Pennsylvania

forgot to mention that I checked for the code on Corvettedoctor.com and could not find it listed.

Dec 23, 2005 | 10:27 PM

Mike Mercury

Team Owner

Joined: Apr 2001

Posts: 54,204

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From: S.W. Ohio. . . . . . NRA Life Member

DTC P1817 TFP Valve Position Sw. - Reverse With Drive Ratio

???

Dec 24, 2005 | 01:24 PM

JackTsDBG

Racer

Joined: Jan 2003

Posts: 426

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From: Annapolis MD

This isn't even listed in the shop manual, not mine anyway (2001). TFP Valve Position Sw - refers to the automatic Transmission Fluid Pressure switch.

Dec 24, 2005 | 04:05 PM

JimK-98

Advanced

Joined: Jun 2000

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From: Paducah KY

manufacter control transmission

Dec 24, 2005 | 10:22 PM

droopwv

Thread Starter

Burning Brakes

Joined: Jun 2005

Posts: 772

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From: Tobyhanna Pennsylvania

Thanks for the answers. Gonna wait til after the holidays and call my mechanic. I don't have a clue.

Dec 25, 2005 | 02:24 AM

0Chuck CoW

Former Vendor

Joined: Nov 2005

Posts: 11,792

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From: Ossining New York

St. Jude Donor '07-'08-'09-'10-'12-'13-'14

Don't quote me on this but........

Quote:

Originally Posted by droopwv

Check engine light came on. Giving this code P1817. Can anyone tell me what this code means? Thanks.

Don't quote me on this, but......I'm pretty sure that it is a failure of one of the trans pressure switches or circuits. The A4 trans has a sensor plate attached to the valve body which provides feedback to the pcm which tells the pcm when a particular fluid circuit is fully pressurized. (or shift is complete). It also uses the switches for a complex adaptive learn function which tells the pcm when components of the trans are wearing so that it can maintain shift timing by increasing fluid pressure to compensate for wear...Again, don't quote me here but I seem to remember that when a failure occurs here (if the trans dosen't go into limp mode) it commands full line pressure to help the trans get you to service....not good to drive around this way...

Have someone look at it soon.

Hope this helps...

Chuck CoW

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Dec 25, 2005 | 01:34 PM

droopwv

Thread Starter

Burning Brakes

Joined: Jun 2005

Posts: 772

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From: Tobyhanna Pennsylvania

Thanks for the info. I am not driving it--thankfully I have a second vehicle that I can drive. Going to play in the snow til after the new year and then I will worry about getting it fixed. I appreciate all the answers anyone might have.

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