MALIBU P0171 AFTER REPAIR CHECK ENGINE STILL ON.

Question

Changed plugs o2 sensor fuel filter intake air sensor plugs and code still reads p0171 an fuel cleaner

Answer 1

P0171 Fuel trim lean Bank 1

Check the side of the intake manifold, there usually coolant seepage into the intake manifold, if you can see the seepage from the outside you would have it go thru the combustion chamber, and note if there is any coolant lose