6.0 throwing Rich and Lean codes

[YukonandtheHOE]

Any takers on why OBD would throw bank 1 and 2 rich and lean conditions on all 4 sensors?

Im thinking Intake leak
All 4 sensors seem to be reading properly

Input would be much appreciated

 

[Chrismnj]

any codes? mine was showing P0172, too rich on bank 1, it was faulty MAF, per my mechanic.

EDIT

I believe he just cleaned it .

 

[YukonandtheHOE]

any codes? mine was showing P0172, too rich on bank 1, it was faulty MAF, per my mechanic.

EDIT

I believe he just cleaned it .

P0171,P0172,P0174,P0175

Cleaned the poop out of my maf and they re occurred

 

[Kraig]

Throw a code reader on it an watch fuel trims under various conditions to see when it’s rich and when it’s lean. Also, check fuel pressure.

 

[Chrismnj]

If you have amazon prime or any other place with free returns just order new MAF. Could be a fuel pressure, fuel delivery problem or vacuum leak.

 

[YukonandtheHOE]

Throw a code reader on it an watch fuel trims under various conditions to see when it’s rich and when it’s lean. Also, check fuel pressure.

Closed loop was STFT 0 LTFT -25 at idle

 

[swathdiver]

Closed loop was STFT 0 LTFT -25 at idle

Massive vacuum leak, probably the intake gaskets but the air hose could even be cracked. You can spray water/propane on each side of intake and watch O2 sensor graph to check. See youtube for ways to check if nothing else is obvious.

 

[HiHoeSilver]

Closed loop was STFT 0 LTFT -25 at idle

What does the short term do when you get a load on it?

What kind of fuel is in there?