P1404 Chevrolet -

Question

1999 silverado, getting code p1404 and code po300 with a ticking noise coming from passenger side of engine, how can i fix this issue

Answer 1

P1404 EGR valve pintle stuck open
P0300 Random misfire
P0332 Knock sensor circuit rear
You replace the EGR valve. a open EGR valve will cause a random misfire, this is a lean misfire, due to the ticking noise it can cause a knock sensor code condition.