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P086 code on 94 Concours


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What would be the root cause of the code p086? I have a 94 concours and it wont shift past 40 mph. the car was hit on the passenger side and then i started to get all kinds of codes poping up. i saw your other responce on how to check the codes and clear them so i did that and took it for a drive. still wouldnt shift and came back with the same 86 code when i returned. I understand the computer systems are under the dash on the passenger side but are they all there and are they seperate. also would this be a transmision computer issue or the "main" PCM issue? I have changed a pcm in a neon before but that was simple. easy to get to and there was only one computer. where should i start looking to get this fixed?

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P086 (E086) ................... Undefined Gear Ratio (Transmission Pressure Control)

Was the tranny replaced for any reason?

Is is not shifting past 2nd gear? It might be bad shift solenoids or a bad pressure control solenoid

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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What would be the root cause of the code p086? I have a 94 concours and it wont shift past 40 mph. the car was hit on the passenger side and then i started to get all kinds of codes poping up. i saw your other responce on how to check the codes and clear them so i did that and took it for a drive. still wouldnt shift and came back with the same 86 code when i returned. I understand the computer systems are under the dash on the passenger side but are they all there and are they seperate. also would this be a transmision computer issue or the "main" PCM issue? I have changed a pcm in a neon before but that was simple. easy to get to and there was only one computer. where should i start looking to get this fixed?

Were codes P028, P029, P076, P089, or P094 set? If so diagnose them first.

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