Hi, this is an obd2 trouble code table, can help you understand the code. and this tool connects this tool can solve your problem,hope help.
GM Tech2 can solve your problem,hope help.
You don't have MAF codes
Are you not aware you start with & diagnose
& resolved all code related issues first?
I don't see how you could change a MAF as you
won't know how to test it
PO-171 System too lean (Bank 1)
PO -174 System too lean (Bank 2)
That sounds like a vacuum leak that effects
both sides of motor
The front O2 Sensors get replaced at 100,000 miles
If that was done don't do them again unless they fail
80% of O2 Codes are vacuum leaks that lean out
the fuel mix. The Sensors are just reporting what they
see. It is up to a mechanic to find out why
When they report lean then the ecm adds fuel by
increasing injector pulse width thus bad gas mileage
I suggest buying a $50.00 code reader & study OBD2
Systems on the internet.
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