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1999-S80-T6- Bad Idle & DTC code

  #1  
Old 04-17-2009, 08:22 PM
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Default 1999-S80-T6- Bad Idle & DTC code

This is my first post so i hope i do it right. Thanks for all your Help!

I have worked on many cars over my lifetime ... but never have had a resource like this forum to ask questions ... just parts store manuals and occassionally a factory manual.

I went to the dealer today on the Throttle Body Recall, and they did a computer download and after that the car ran like a new car (well at least 98%) When i got home 27-30 miles through traffic i shut it off. When i recranked it less than 1/2 hour later to check something ... it was back doing the same loping idle 500-1100 rpm and almost stalling.

I have a feeling i have a bad throttle body ... they service guy said that would be covered if it was bad ... under the recall.

So i am also running a DTC code ... i don't think they have any connection but i know i have a lot to learn also.

The code on my ACTON scanner says it's a DTC P1238 but i don't know enough about that yet to do anything.

Lastly i would really like to find a service manual (better than the cheap ones) ... I saw on another thread about the VADIS download DVD ... would that answer most questions i would have on servicing this car?

Thanks !

Jim
 
  #2  
Old 04-18-2009, 07:10 AM
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Yes Vadis should be able to answer just about any question you have.
P1238 is a code for the turbo control valve.
 
  #3  
Old 04-19-2009, 08:00 PM
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Default 1999 - S80-T6- Idle & DTC problem ...

Thanks for your help on the DTC and VADIS.

Does the idling problem seem consistent with a Throttle Body problem?

Can anyone explain why when they did the download that it cleared up the idle for more than 30 miles. Then when i shut off the motor it came right back. (the battery was pretty fresh)

Any thoughts as to where i should start looking for the p1238 DTC problem?
 
  #4  
Old 04-19-2009, 10:31 PM
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Maybe the throttle body is bad. The software they install moves the computer parameters all the way to the max. So it might have seen it as being fine for a little while then not after the first drive. I would call and talk to them about it.

Check the vacuum lines for the code.
 
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