check engine light is on?

kdg3366 · 2016-08-01T18:40:40+00:00

just bought this vehicle it has 4.0 engine not the one where you have to take the tire off to get to spark plugs. I went to Autozone says to replace MAF sensor, but on Rockauto it says it might not just be the MAF so i was wondering about replacing the O2 sensor as well? i think i have more than on O2 sensor. i was just assuming there is only one the one that is usually at the back of the engine. what do you think?

1999 FORD EXPLORER

100 MILES

FREDERICK E. WARD

MEMBER
3 POSTS

Will do

Jan 6, 2021 at 2:25 PM (Merged)

FREDERICK E. WARD

MEMBER
3 POSTS

The code I just got from AutoZone is P0304

Jan 6, 2021 at 2:25 PM (Merged)

SATURNTECH9

CAR REPAIR CONTRIBUTOR
30,869 POSTS

That's cylinder 4 miss fire does it miss fire constantly?Or does it do it off and on?The detail's the better like what rpm etc.

Jan 6, 2021 at 2:25 PM (Merged)

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