My engine light is one so my mechanic scanned and found an oxygen leak in
the exaust. What can cause that? for the full story read the following
I have a venture van 2000 and recently got an misfire code that was read at
the mechanics shop. Also, scanner detected an O2 leek. The cleared the
error message and (June 25th) I change the spark plug for that 6th cylinder.
I notices the nipple circle on the top hook of the spark plug was totally
gone. I checked a different plug and the nipple was fine on that one.
Also to mention that we had problems starting the ignition on the first try
(sometimes takes 5 tires). Now that I put a new spark plug it starts like
a beauty. I had the engine light come up before (5 months ago) and
mechanic found a O2 leak. But did not mention a miss fire problem. That
time he cleared it and it was fine until a week ago. So now I want to
figure out why I had this problem so it does not happen again. My
warranty just ran out and will be selling the van this summer. I would
appreciate any additional insight as to what the root cause of this problem.
Could a miss fire cause O2 leak? Or did the o2 leak caused the miss
fire, leading to worn out spark plug? I have about 50,000 km (about
30,000 miles). What do you think? Thanks.
I have driven it some more today and now the engine light is on again, after
changing the spark plug.