Got a P0420 MIL CODE. Chrysler 2005 Town and Country 3.8L.
Between 100-150K miles.
Fairly good maintenance.
Recently replaced EGR valve for second time (just proactive for mileage etc.)
Recently replaced rear valve cover gasket
Still change with rec'd synthetic oil. 5W30\
Regular spark plugs, oil changes, etc.O2 sensors
, I simply can't remember, so I really don't know if they have ever been replaced - if they have certainly not recently at all
Other than above, no major parts replaced and no engine
Van used to get driven often, but for the past year+ it is driven very little. About every other day, but not many miles.
The van has been losing about a quart of oil at least every 2K miles or so. I thought it was all leaks, but with this new code I'm fearing it may have been burning some oil too. Seems this code usually means cat converter, but I would like to know my best bet. If it is the cat converter, what's the best plan, and converter to get? I plan on doing the repairs myself if possible as I have for several years now. Also, if the cat converter is bad from burning oil , then what the prospects for it lasting beyond replacement? Obviously , I'm hoping I won't have to do any engine rebuild to fix an oil burn. I don't see any oil burning in the exhaust, but I realize this may not be visible.
Other than the "slow" oil loss, the van runs OK as it usually does. I have other minor problems like a noisy slow speed steering that I've never been able to sort out, but other than that it is OK.
So, I'd like a best answer to the above question. Also, if it is something expensive like the cat converter, I'd like to know if I can drive it for awhile without fixing. I just reset the code tonight, so I don't know if/when it will throw again - but as murphy's law i'm sure it will soon again.