Originally posted by 1997 GL Alabama:
Ah just got a code 171 too

I cleaned the MAF with some compressed air from Staples, about 2 days ago. Would that be the problem?

Should I get some B-12 and reclean it?

O2 sensors were put on about 15-20K ago.





Have fun, I have PO171 as well about every 6 weeks.

Checked using SnapON scan tool, IAT, MAF, ECT, O2 sensors. Cleaned MAF several times. Replaced several vacuum lines.
Replaced upstream O2 sensor twice, had PO133 slow response.

I replaced my injector O rings this past week, they were leaking air on the intake stroke.

So far it looks good, 210 miles at half a tank, of course that was 95% highway.
We will see next week when I use it going to school if the mileage holds up.