1999 Mazda Protege: P0402 EGR valve and catalytic converter
Got the P0402 EGR valve and a tech bulletin from mazda stating this could be caused by carbon deposits at the egr outlet port , and inside the intake manifold. This may increase the exhaust gas flow circuit. My question is , could this be causing the other error codes I am getting, ie catalytic converter, oxygen sensor. I know I should just clean the valve then go and see if the codes clear, but was wondering if anybody has had this problem since a tech bulletin was put out on the part.
the simplest answer is yes it will most likely
can you clear the codes and check again?
this may help
Alex Hus さんによる