I've driven 90+ miles and so far no CEL. It would appear that cleaning the MAF sensor did the trick.

Here's what happened over the weekend...Saturday I mistakenly cleaned the temp sensor on the MAF sensor, let it dry, and took the car for a drive. Within a few miles the CEL was on again. Crap! I came back to this thread and realized my stupid mistake so Sunday I cleaned the two wires inside plastic...

I found a post in a Matrix forum about cleaning the MAF. It has several nice pictures which is good.http://matrixowners.com/?showtopic=27838I hope this helps anyone in the future with the same problem!

I'll go home and check it tonight. The MAF is located in the air intake hose, correct?Just so I understand what's going on here... assuming the MAF is bad/dirty, the theory is it is sending a low air quantity signal to ECM therfore reducing fuel to the cylinders resulting in a lean condition. Right?

I always make sure the gas cap clicks when I tighten it. A few years back I had a friend go to the dealer because of a CEL. $60 later it was determined that the gas cap was not tightned and the gas tank wasn't preasurized.The MAF (Mass Air Flow) Sensor is dirty or faulty. Note: The use of "oile...

Fluids were all good. I checked them last night when I got home.I just got back from Autozone and code was P0171. The guy told me it meant I was running lean. He reset it so if the light comes back on I know I have a problem.Would bad or "different" gas trigger a lean code? I always fill u...

Hi, all!I have an 06 auto Vibe with a little more than 45,000 miles on it. On my way home from work yesterday, the check engine light came on. The car ran fine all the way home and ran fine again this morning on my way back to work so I'm not too worried about it right now. I plan to run over to Aut...