lean condition

[VT4x4]

check engine light came Analyzer said lean condition . What causes this and should I be replacing something?

 

Thanks  2009 sierra HD 6.0

[04BlackMagic]

A lean condition is when the engine is receiving too much air and not enough fuel.

What causes a lean condition: vacuum leak on intake, cracked intake hose, bad B1 oxygen sensor, intake manifold gaskets bad, fuel pump not strong enough etc

What specific codes does the truck have?


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[VT4x4]

14 minutes ago, 04BlackMagic said:

A lean condition is when the engine is receiving too much air and not enough fuel.

What causes a lean condition: vacuum leak on intake, cracked intake hose, bad B1 oxygen sensor, intake manifold gaskets bad, fuel pump not strong enough etc

What specific codes does the truck have?


Sent from my iPhone using Tapatalk

will get them thanks 

[VT4x4]

2 hours ago, 04BlackMagic said:

A lean condition is when the engine is receiving too much air and not enough fuel.

What causes a lean condition: vacuum leak on intake, cracked intake hose, bad B1 oxygen sensor, intake manifold gaskets bad, fuel pump not strong enough etc

What specific codes does the truck have?


Sent from my iPhone using Tapatalk

yes the code says PO171 thanks again 

[riverbanks]

Without the proper tools,i.e.,scanner,I would change the o2 sensor on drivers side

[VT4x4]

8 minutes ago, riverbanks said:

Without the proper tools,i.e.,scanner,I would change the o2 sensor on drivers side

Is that what the code says 

[riverbanks]

Yes and no,a problem is highlighted at b1,02 sensor,so, sensor fault?,or it's telling the truth,and problem is upstream

[VT4x4]

13 hours ago, riverbanks said:

Without the proper tools,i.e.,scanner,I would change the o2 sensor on drivers side

the code says PO 171 

[riverbanks]

Ok,what does that mean to you?

[VT4x4]

23 minutes ago, riverbanks said:

Ok,what does that mean to you?

I do not know that's why I am asking 

[riverbanks]

The 02 on drivers side saw a problem,is it the sensor itself or a actual reading?,you mentioned"analyser"in first post,more like code reader, you got to read the internals of the system,i.e.scanner,is the o2 behaving?or is it the source of the code?if it is old,change it,source or not,they get tired,so a new one is a benefit for you,no cheapo stuff,buy denso

[Colossus]

Just because a check engine code says O2 sensor is showing a reading out of limits does not mean you should just go change the O2 sensor.. what if the O2 sensor is working the way it should and something upstream of it is causing the issue (which happens more often than not!)  Proper diagnosis is key.  Throwing parts at something is just wasting money. 

[riverbanks]

Yep,so disregard my saying change o2