My check engine light is on and I had checked by a mechanic and he said it needs a EGR valve... I wanted to double check so i went to autozone so they can read the troubleshooting code off the computer and the readings came up as P0402 and P1404... I just want to make sure I don't need a new EGR valve and spend $140 for a new valve and a lot of money for labor. If someone could send me the troubleshooting instructions for those codes, it would be a great help [img]smileys/smiley4.gif[/img]

 

Usually cleaning the EGR system will take care of any EGR related codes. Try the cleaning first and see if that works. Here is a 'how to' write up from the FAQ http://isuzufaq.ibctech.ca/#faq1