anyone of you had a problem with their montero about check engine suddenly lit up? I brought my montero to the casa and the S.A. told me there was a problem with the fuel i used that it was dirty and with water and that is why they had to change the fuel filter. I wonder if it was really true or the casa people would just make alibi's to earn a profit. This happened twice already and i was using a petron turbo diesel so how come that diesel was dirty? What was more peculiar was when i was about to bring the montero to the casa, the check engine light just disappeared. I was thinking it was the sensor or the computer that has a problem....

Any suggestions? thanks.