Hi Guys,

My check engine light came yesterday when speed above 80 MPH. I took it to auto-zone to get he give this code P0171 and I asked to clear it for me. My rodeo run fine and no CEL come back on. Is any one knows this code is and any idea where should I start work on it? Thanks for in advance.
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P0171


Fuel Trim System Lean Bank 1


How old are the plugs?

How old is the intake manifold gasket?

80? Yikes I'd hate to pay your gas bill LOL. Can watch the gauge drop on mine when I go over 65.

With just the one code it could be hit and miss on trouble shooting. Start with plugs. Could be the o2 sensor reading a bit off. Manifold gasket usually has more codes associated with it but not always, could be it. Could also be an injector getting clogged.

thats what all my intake manifold gaskets started with . po171

P0171


Fuel Trim System Lean Bank 1


How old are the plugs?

How old is the intake manifold gasket?

My plug was replaced 80K miles now is 133K miles and manifold still OEM just like I said, it only comes when I run 80 MPH and above, other that CEL never come on if I drive normal. Thanks.