pdoros

I had the Check VSC a few months ago.....gone to Limp mode....40mph.....Hardly travel for an hour....Turning off the car, can let you drive normally for about 5 minutes or like 5 miles befor going to limp mode again. After that Lexus asked for Euro 3000 for a catalytic converter. Grrrr very sad....anyway.... my local mechanic told me the diesel used in our country is not the best to find (durty) so we used a liquid in the diesel tank....like 100ml and can clean the diesel pathway. And so it did successfully. is been now more that 4 months and the problem is gone.....actually i use one dose of 100ml per month in my diesel filling. Important think to notify is that what all the above done i also opened my self the EGR VALVE and cleaned it. Guys it was 75% of coal surrounding the valve whole. Almost closed valve. I beleave EGR Valve need cleaning at every Service. Note...after all these am not sure yet if the problem getting the car to limp mode is the Catalytic converter as Lexus suggested....and did not mansion warranty.

Boys VSC check shows up yesterday and Car gone to a very slow mode.....50mph. We cleaned up the very very dirty EGR Valve but again the car is going to slow mode. Ofcourse we reset the alarm but nothing. What is wrong? what should i do? Please help.. Doros