What the dealer is referring to is called Air Flow Meter... it measures how
much air entering the engine air intake.
Now, if you reset the check engine light... and it came back practically
immediately, then you gotta change it. Without this the engine will not burn
gas properly which will burn both your cat converters and that will cost
$3000 to repair... although cat system is covered by federal warranty for 8
Which brings me back to this... since AFM is part of emission system...
shouldn't it be covered by the federal emission law? This is because without
this, the car cannot pass the emission test.