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P0174 trouble code

4K views 5 replies 3 participants last post by  angelo 
#1 ·
On my way to work this morning check engine light came on. P1074 is the code that came up. Any idea what is causing that?

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#2 ·
P0174 System too Lean (Bank 2)

a few things could be wrong....type p0174 in the search box and start reading... :cool:

-ALF out....
 
#3 ·
exhaust bolts broken, loose.
pcv fresh air tube cracked or broken
injector leaning out on the passenger side


p0174 is the lean code for bank 2
 
#4 ·
Gonna check it out this evening before i leave from work. Thanks



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#5 ·
John96ss,

I had my oil change today and had the car scanned. I have P0174 too.
mine goes on and stays for about 60-100 miles then goes off and CEL turns off.....
Then in a day or 2 it does it again and CEL comes on.

As a step 1. we sprayed the MAF with MAF cleaner, and CEL was OFF when i went to mech today.
PCM only said it first happened 2300 miles ago and bank 2 was at 18% when Bank 1 was at 25%
mech said when it goes BELOW 25% it kicks the CEL on.....
I am just monitoring mine for now as car runs fine and pulls hard, just stupid CEL goes on....

Lastly i have a long hill on my daily commute and lean into throttle to get up the hill and that is common place for CEL to come on.....(cruz 1500 RPM @2000 RPM up hill)

-ALF out....
 
#6 ·
To the OP....did you get this resolved ? I just had a re-occurrence.....

Back in mid Sept i got my custom CAT-Back installed.
Today on about 5 mile in to my 30 mile commute to work the CEL came on. got P0100 and P0174.

Starting to wonder if the cold weather is making this happen ? Or the winter mix of gas ?
I think i will buy a 20gal treatment of Chevron until next oil change to have it looked at again.
-ALF out...
 
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