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Ron, ASE Certified Technician
Category: Ford
Satisfied Customers: 23821
Experience:  23 years with Ford specializing in drivability and electrical and AC. Ford certs and ASE Certs
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I have a 2002 Ford focus wagon. I took it to get a smog and

Customer Question

I have a 2002 Ford focus wagon. I took it to get a smog and the Lean code PO171 came back, they mentioned it was a MAF sensor it could be dirty or need replaced. The car runs well but it does seems at time like it doesn't have full power on big hills. Also My sis got a new alternator about month ago, and I recently a battery. As I was driving the battery light blinked then left, then he came on again when I exited off freeway & then left. I had both tested battery is good, alternator is working but its showing some things going on with communication to battery
Submitted: 1 year ago.
Category: Ford
Expert:  cloe0626 replied 1 year ago.

i would start by checking the battery terminal they may need to be replaced

Customer: replied 1 year ago.
All that's been done
Expert:  cloe0626 replied 1 year ago.

have you traced the cables to make sure there is no exposed wire on the cables

Customer: replied 1 year ago.
on the battery cables were checked when I got battery