caglo Posted April 12, 2005 Share Posted April 12, 2005 I was driving along and the notorious check engine/trac light came on. I searched the forum, but I still don't really know how to do a self diagnostic check. If anyone could help, that'd be wonderful. The car is running perfectly normal, or so it seems. I drive it moderately hard, add on to that I think I put lower grade fuel in last fillup (a sin, I know). Fluids are good. So yeah, any help would be great...thanks. Quote Link to comment Share on other sites More sharing options...
teelias Posted April 13, 2005 Share Posted April 13, 2005 I was driving along and the notorious check engine/trac light came on. I searched the forum, but I still don't really know how to do a self diagnostic check. If anyone could help, that'd be wonderful. The car is running perfectly normal, or so it seems. I drive it moderately hard, add on to that I think I put lower grade fuel in last fillup (a sin, I know). Fluids are good. So yeah, any help would be great...thanks. ← Quote Link to comment Share on other sites More sharing options...
RedRocket Posted April 20, 2005 Share Posted April 20, 2005 I was driving along and the notorious check engine/trac light came on. I searched the forum, but I still don't really know how to do a self diagnostic check. If anyone could help, that'd be wonderful. The car is running perfectly normal, or so it seems. I drive it moderately hard, add on to that I think I put lower grade fuel in last fillup (a sin, I know). Fluids are good. So yeah, any help would be great...thanks. ← You should get an OBDII code reader. They are under $100 for the real cheapies but they are still a handy device. It is possible the lower grade of gas caused the MALF light to set, if that's the case it will reset itself. I run 89 octane in my 99 SC400 but don't get on it hard. For mountain driving/hard accel go to the 92. :D Quote Link to comment Share on other sites More sharing options...
caglo Posted April 20, 2005 Author Share Posted April 20, 2005 Just as of recently, I hear a slight high pitched noise that I don't THINK used to be there...fuel pump? (everything seems to still be running fine) Quote Link to comment Share on other sites More sharing options...
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