Okay, I am having an issue with a PO420 code coming on. I clear it and can drive maybe 30-45 minutes before it comes back on. I have read that there are several possible causes. It appears that either 1 or both of the O2 sensors are bad or the catalytic convertor is bad. I'm going to start with at least either the upper or lower sensors being replaced. Has anyone had to replace O2 sensors and which one is more probable. My scan tool isn't showing me the output voltages but I'm willing to take a shot at replacing the O2 sensors first. The cat is pretty expensive. Anyone have any ideas or experience. Thanks, Budd
Oh, by the way - I am the guy that installed the engine that turned out it was for a car basically due to the oil pan (Upper) not have the axle center support bosses being wrong for that pan. Anyway, I found that a Sentra center support worked perfectly. I think the difference is the upper and lower oil pan is a little smaller for the Sentra. So that means I have to change the oil a little more often. This van will never be a work truck again, I'm thinking of converting it to a Camper.
Oh, by the way - I am the guy that installed the engine that turned out it was for a car basically due to the oil pan (Upper) not have the axle center support bosses being wrong for that pan. Anyway, I found that a Sentra center support worked perfectly. I think the difference is the upper and lower oil pan is a little smaller for the Sentra. So that means I have to change the oil a little more often. This van will never be a work truck again, I'm thinking of converting it to a Camper.
