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1995 Cadillac STS code PO86


Rayscaddy

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We have a 1995 Cadillac STS we have been working on. Code 86 continues to reappear. The car does not run rough and the inside of the transmission is very clean. Thus far, we have replaced the PCM, Transaxle pressure switch, done a trans service, replaced the torque converter selenoid and the transmission input speed sensor. We are becoming very frustrated. Anybody have any ideas on what the magic bullet could be? Any help would be appreciated !! Thanks.

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We have a 1995 Cadillac STS we have been working on. Code 86 continues to reappear. The car does not run rough and the inside of the transmission is very clean. Thus far, we have replaced the PCM, Transaxle pressure switch, done a trans service, replaced the torque converter selenoid and the transmission input speed sensor. We are becoming very frustrated. Anybody have any ideas on what the magic bullet could be? Any help would be appreciated !! Thanks.

Check the wiring harness for chafing and for a bad plug, clean moisture out of the plug. Also check for bad grounds, chase those components back and see if a common ground exists

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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