Fuel dripping instead of spraying, injector sensor issues?

Question

A local, trustworthy, and frank mechanic I go to explained to me how this lean code is caused. Don't quote me, but possibly a position 102 sensor? He stated the lean code is either from the fuel 'bathing' said sensor, fouling it and the ecm reading lean, or that the fuel has evaporated by the time it reaches the lower manifold, also giving off the lean code due to insufficient atomizing of the fuel. If I heard correctly about the sensor mentioned above and that is the root cause, how difficult would it be for a moderate skill DIY'er to complete?
I recently (two hours ago) dropped octane booster, fuel injector cleaner, and seafoam into the fuel tank at the appropriate ratios. Any and all insight is greatly appreciated.

Answer 1

If the fuel injector did not atomize properly you would set a misfire code. You would also not only set a misfire for that cylinder but you would have a P0300. A lean code mean there is more air than the fuel. This is more a vacuum leak . A Chevy 3.5 has a MAF (mass air flow) and a MAP (manifold absolute pressure ) sensor.

​ Here the MAF sensor, from the MAF sensor if there is a vacuum leak that gets past the MAF such as the MAF air duct if having rips or is torn this would set a lean code condition

​ This engine has a MAP sensor also , check it here this MAP sensor is lightly tug ( this engine had a P0171 with trouble accelerating and a TPS and MAF sensor code)

​ Here the MAP sensor was found to be faulty, a slight tug on this sensor should not cause it to break. The fix for the Lean code and the MAF sensor code with the TPS code was caused by a faulty MAP sensor.