P0101, P0171, P0174 Codes. PLEASE HELP!

[Daniel Dufresne]

I am getting these codes on my 2004 GMC 1500 5.3l. I have read up on them and I just get way too deep on the internet and flustered. Any way someone could point me in the direction to start? 

 

[Brian715]

P0101- MAF Sensor. - system can't measure how much air is coming in.

P0171- too lean bank 1- not enough fuel

P0174-too lean bank 2-not enough fuel

Clean your MAF and reset. 

In a nut shell, your truck can't decide the correct amount of fuel to add because it doesn't know how much air is going in. 

[davester]

also check that your exhaust manifold bolts are all present.

[Daniel Dufresne]

Thanks for dumbing this down for me. I have cleaned the MAF and I also have what looks to be broken manifold bolts..the very back ones on each side. Just going for a drive now and will see how it runs.

[Daniel Dufresne]

Still throwing that code. I pulled the sensor and ran it and it threw another code. Plugged sensor back in and second code went away. Might just have to pay someone to fix this I think...

 

[riverbanks]

Pulled the sensor?hoping you mean,you unhooked the electric connection from MAF

[Daniel Dufresne]

Yes sorry. That's what I did ya. 

[riverbanks]

What are you reading codes with? reader or scanner?

[Daniel Dufresne]

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