I have been working on a Service Engine Soon light for a while now on my 2002 GT. the first time it came on I had Autozone check the codes and I got 0171, 0174, 1130 & 1150. I changed the spark plugs, cleaned the MAF with MAF cleaner and the throttle body with TB cleaner, and also replaced a hose that had a 2 inch long crack in it - the short hose that comes off the PVC valve on the passenger valve cover.
After the work - the Service Engine Soon light went out for a few days after I did that, going maybe 20 miles with it staying off, and running much better with more power and revving much more easily. Now the light is back on and it feels very sluggish again, I checked to make sure none of my spark plugs had backed out, no problem there, and had Autozone run the codes again - now it's only the 0171 and 0174 codes showing up, which means it's running lean on both banks. So....does that mean the MAF is the problem??
After the work - the Service Engine Soon light went out for a few days after I did that, going maybe 20 miles with it staying off, and running much better with more power and revving much more easily. Now the light is back on and it feels very sluggish again, I checked to make sure none of my spark plugs had backed out, no problem there, and had Autozone run the codes again - now it's only the 0171 and 0174 codes showing up, which means it's running lean on both banks. So....does that mean the MAF is the problem??