FYI, Engine Code P0171
#16
04-24-2011 | 08:27 AM
Thread Starter
|
Junior Member
Joined: Jan 2011
Posts: 12
From: Northwest Arkansas
1. The soft foam gasket between the fender wall and the tube that goes out to the intake. If you don"t pay attention the gasket will move out of place.
2. The hose that goes into your air intake all the way in the rear. You have to physically make sure there's a good seat on the hose to the air box or else you will also have a vacuum leak there.
BTW, My 'engine light' has never came back in the last 4 months after I added the injector cleaner mentioned in the beginning of the thread but I did replace my plugs with OE Iridiums a few weeks after adding the injector cleaner.
#17
04-27-2011 | 03:11 PM
Senior Member
Joined: Mar 2011
Posts: 176
My issue ended up being your #2! I have a thread on HummerXForum that depicts the spark plug replacement job. Everything I have read talks about sticking to OEM plugs. I got a great deal from Thirdflat, super cool guy! Please check out my thread.
http://http://www.hummerxclub.com/forum/viewtopic.php?f=25&t=13700
http://http://www.hummerxclub.com/forum/viewtopic.php?f=25&t=13700
#18
04-28-2011 | 08:41 AM
Thread Starter
|
Junior Member
Joined: Jan 2011
Posts: 12
From: Northwest Arkansas
My issue ended up being your #2! I have a thread on HummerXForum that depicts the spark plug replacement job. Everything I have read talks about sticking to OEM plugs. I got a great deal from Thirdflat, super cool guy! Please check out my thread.
http://http://www.hummerxclub.com/forum/viewtopic.php?f=25&t=13700
http://http://www.hummerxclub.com/forum/viewtopic.php?f=25&t=13700
#19
01-18-2012 | 12:32 AM
Member
Joined: Nov 2011
Posts: 83
hey guys i've been reading this thread and I am having similar issues. First I thought it's the MAF being dirty as I had cleaned the K&N filter before triggering that light but then the spark plugs needed to be changed and when I did the P0171 came back again and I thought some dirt got in again but now I'm thinking it might be a vacuum leak. I am not an expert with cars so how can I check for that? how can I make sure that the mechanic replaced the spark plugs the right way?
#20
06-21-2013 | 09:10 AM
Junior Member
Joined: Apr 2012
Posts: 1
Update on the engine light
Hey guyz I recently purchased an H3 and the engine light was on. Went to the local Oreillys and they scanned for codes. It came up with a "P0171" which is a "system too lean (Bank 1)". I bought a bottle of "GUMOUT - Regane Fuel System Cleaner" and being that I was running a bit below a quarter of a tank I added the bottle and filled it up with premium fuel. The light had been on for a few weeks since my purchase. I went a total of about 10 miles on the way home from work and the "engine" light disappeared.
Hopefully this solves the issue. I read that cleaning the MAF sensor also helps but have not got to that point yet. I also ordered a set of E3 spark plugs and will be installing them hopefully this coming weekend.
I will update you guyz to see if this issue is fully resolved. They say fuel injector cleaners never works but I've had results go both ways. I've had it fix issues or burn out fuel pumps.
Only time will tell...
Hopefully this solves the issue. I read that cleaning the MAF sensor also helps but have not got to that point yet. I also ordered a set of E3 spark plugs and will be installing them hopefully this coming weekend.
I will update you guyz to see if this issue is fully resolved. They say fuel injector cleaners never works but I've had results go both ways. I've had it fix issues or burn out fuel pumps.
Only time will tell...