2003 GMC Yukon Denali "lean" Questions

...codes(p0171bx2, p0102b, p0174b) and i dont know where to find out what they are. Also it read im lean in bank 1 & 2 po 0102 is mas air flow sensor maf/vaf p0171 bank 1 too lean p0174b bank 2 ...

...pump is excessive cranking, and the engine cough through the intake, a check engine light stating lean bank one and lean bank two.You would have a MAF (Mass air flow

my service engine soon light came on! the trouble code displays PO174 System Too Lean Bank-2 what can cause this code??? I got a few answers but none of them seem quite right. Any suggestions???? Lean

...out. Idle is up and down up and down, seems to improve as engine heats up. Code reader says 'Lean Bank 1, Lean Bank 2.' No other codes present. Changed fuel filter, air filter, cleaned MAF

my 2002 yukon denali has started to lean to the front on the drivers side. What can cause this Your suspension is going bad. I suggest you take it to Hibdon's (or the like) and have it inspected for ...

codes read random misfire code reader says random misfire also says fuel running lean on 2 o2 sensers change bottom 02 sensor

codes reading misfire codes are reading misfire also reading lean from o2 sensers Ok, what have you checked so far ? How old are the plugs ? Have you checked fuel pressure ?

...O2 sensor outputs and replace as needed. Could be a leaking intake manifold gasket if you get "lean banks" codes. This happens in cold winters, but fixes itself in

...the fuel delivery to the engine cylinders is not correct causing the vehicle to run too rich or too lean. you need to find out what code{s} have turned on the check engine light. If you continue to ...

my engine light is on and the codes are reading system to lean bank 1 and 2. The code are p0171 and p0174 This is sign of a vacuum leak (possible off of the PCV system). This causes additional air to ...