Well got this again.
Cleaned my mass air flow sensor a few years ago and cleared the code.
Came back again recently. Even after cleaning sensor and resetting code.
Reset the hose near intake valve and checked for leaks.
Clear code again, so far no issues.
Might re clean maf sensor better though and not rush it.
Plan to change both oxygen sensors with cheap ones I found on ebay.
I'm sure nearly 10 yr old ones have carbon on it.
Trying fuel system cleaner since I can't get to my injectors since lack of those skills.
Don't want to go to dealer for now since I spent nearly $800 to replace intake manifold gasket , coolant hose, and a radiator flush a few days ago.
Top off with quarter of a quart of synthetic oil since they did work on the manifold gasket.
Runs pretty smooth but not perfect as b4.
Using techcron injector cleaner until my cans of b44k fuel system cleaner arrives that I'm giving a try.
Can't change fuel filter with our hard setup.
Hoses seem pretty ok for decade old stuff.
Code might reappear again in few days, but hope not.