blackjason

OK. So I just pulled the codes off my car and it showed...21,25, and 28. Would it be fair to say that I still have exhaust leaks or would it be O2 sensor issues. I am gonna try and clear them and drive to see if they were stored from the previous leak or if something is still going on.

Thanks for the info guys...Does anyone know if there is a complete aftermarket exhaust system for the 1994 LS and if so is it worth the extra money to replace it all being that there could be potential cracks in the stock piping? I can still hear some exhaust noise in and around the engine bay. And as for pulling the codes will the car store the codes even if the check engine light is off?

Hello. I am a first time Lexus owner and new to this forum. I recently bought a 1994 LS 400 with high miles (265000). Everything on the car is in good condition, a one owner car, and runs and drives great. However, everytime the car sits for a few hours when I first start it up the Trac Off and the check engine light stays on for the first 3-4 miles of driving. The car had an exhaust leak which i fixed with a new gasket at the flange behind the first CAT. Could this be an O2 sensor failing due to the leak or something else? Thanks for any help.