Figured I would bump this instead of cluttering and starting a new one.
I too have these problems with these 2 codes just after a long trip from MD to MI and back in the cold blast of winter. I experienced them after I got back and went through the enclosed touchless car wash. There was a lot of vapor/steam in the air since it was 10 degrees out, it began to idle pretty bad almost like it wanted to stall, I kept the RPMs up until the wash was finished. Idle was back to normal after being in the cold dry air.Its been starting just fine like it always does, even cold weather. Slight rough idle now since CEL came on. Comes back after clearing the codes.
I also noticed that when accelerating lightly when going above 2200-2400 RPM there is a slight hight pitched whistle just as it's about to change gears. It''s always done this. Sounds like the whistle in my 73 Cougar when I had a really bad carburetor gasket leak.
Suggestions? Intake gasket?
I will clean my MAF and try some carb cleaner around the intake gasket....
I'm interested in this whistle you mention... I have a sound that sounds more to me like an alternator squeal... Only around 2-2300 rpm under light acceleration.
I too have those engine codes since it's been very cold.
I assumed my squeal was an alternator or something, and have been waiting for it to get worse for a year, but it never has. I never considered the intake manifold gasket being a possible issue.
I may order the parts to change that out in the next week or two. For sure to resolve that code issue, but possibly to eliminate the squealing sound.
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