I too have a 2002 cougar with code P0402, indicating it could be the EGR sensor. In a previous post you showed a picture of two items which could affect the sensor. Which do you suggest I go after first? Can you explain each of the two and are there any instructions on how to get at them and replace them?
Thank you in advance,
have the same problem?
Friday, July 15th, 2011 AT 7:41 PM