As above, the CEL comes on to remind me the cat's operating temperature isn't reaching a hot enough level. It goes off when driving around town but after 15 minutes on the highway is back. This has been going on for a year now.
After some research online I have some questions for those whom have been down this road:
Q1: If the temp coming out of the cat is the same, or only slightly higher than going in, that confirms it's whipped, right?
Q2: Is there any merit in pouring a gallon of lacquer thinner in the gas tank?
Q3: Is there any harm trying?
Q4: Should I stick with OEM replacement catalyst or is aftermarket okay?
To say a CEL light on drives me crazy is an understatement. I will go insane if I replace everything and it's still on so trying to avoid this scenario.
Car is otherwise working fine and I must have the only 2008 crowding 200,000 miles which has never had a leaking head gasket.
TIA