19 Oct 11 07:43, TOM WALKER wrote to MARK HOFMANN:   
      
      
    MH>> I didn't realize the CEL light had anything to do with items other   
    MH>> than emissions.  When I read the code on the Durango and it said   
    MH>> "power steering high pressure sensor", I was caught off guard.  I   
    MH>> replaced it and the code w away, but had forgot to add more fluid at   
    MH>> the time.  I didn't have any on ha and like many things, if you   
    MH>> don't do it right away - you forget.  It was ab 2-3 inches low in   
    MH>> the reservoir recently which was causing that noise.   
      
    TW> The CEL light is more of a Engine Computer Check system. The smog   
    TW> device monitiring is jsut an add on. My now gone Chev S-10 even had   
    TW> the automatic transmission monitored by the CEL system   
      
   Not only that, but the ECU tells the transmission when to shift and how   
   much hydraulic pressure to apply. The dealer, or you if you have a tuner,   
   can change all of that.   
      
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