Is it necessary to replace the MAF sensor?
Hello all! This is my first time posting in such a forum. I need some advice and don't know enough about vehicles to make a decision. So, I thought I would ask people that new more.
I own a 2001 Pathfinder with about 72,000 miles. My Service Engine Soon lindicator came on and I had it diagnosed ($150!). The garage informed me that Bank 1 was running lean and the Mass Air Flow (MAF) sensor should be replaced...costing $750?! They cleaned it which improved the fuel trim readings. According to them that wasn't enough and they said if the MAF isn't replaced this could lead to replacing the catalytic converter as well. They also told me that the Service Engine Soon indicator would come back on. It has not and it's been several days.
So, my question is...since the indicator has not come back on does this mean everything is ok from the cleaning of the MAF? and is this something that I could do myself if I needed to? I've looked around on the internet and the cost of the MAF is about $250 a far cry from costing me the ridiculous amount they wanted to charge me. And lastly, they mentioned that my spark plugs looked warn and that a tune up was in order...for $400. Could the spark plugs be warn from the poor emissions? I thought plugs should last to 100,000 miles.
I would appreciate any input to the questions I've asked. Remember, I don't know much about vehicles, so keep it simple. I feel like the garage may be taking advantage of me because I am clueless. Thanks for your assistance in advance!