p0171

I bought a 96 lx450 recently and it’s had a p0171 code that I cannot seem to fix. So far I have cleaned the MAF, done the throttle body gasket, many vaccum lines & the intake hose, smoke tested it(no leaks), replaced the fuel filter and am at a loss as to where to go from here. Do you think best...

I originally had P0171 system too lean CEL and did the following - Cleaned up the MAF (dirty) Checked fuel trims on techstream and found long term high on banks 1&2 at idle(+~30), dropping as RPMs increased Pulled air intake manifold and cleaned throttle body(dirty), replaced air filter...

So, i was able to get rid of this code for 6 months, of course now its back, before i had fixed connector to MAF, both o2 sensors, and rear knock sensor and fuel filter, i got it to turn off for 6 months, now its back, kinda weird tho, I reset it on a hunting trip and it went away for like 200...

I was getting knock sensor code for new knock sensors, I swapped the sensors to see if it was the harness or the actual sensor. Now getting system too lean on both banks Any pointers?

So last year a mouse decided to build a mansion of a nest in the V of my 2005 GX470's engine and soon after that the dreaded check engine light came on. Since then I personally have replaced the following: secondary air injection pump both left & right air injection check valves air injection...

Ok so I had a CEL pop up at the beginning of March literally days before I left for Hurricane, UT.... P0171 which is a kind of vague code that points to a "Bank One Lean condition". This can be a whole variety of things from a faulty MAF, faulty O2 sensor, Vacuum line leak, faulty PCV...

Hi everyone. I have come to get knowledge on my 2000 lc because I have a P0171 code and I can’t figure out what it is. I have replaced all O2 sensors and had reset but code came back 2 days later. I have had a evap leak before and I know I did not have the best mechanic in town. What would you...

Hey gang, its funny that prior to these hot temps there was not a lot to be found on here for the issue i was having leading up to what ultimately left me on the side of the road. I wanted to share my experience of the symptoms my 2007 Land Cruiser was showing and what I did to address it and...

Gang, I got a new code today, truck hates me sometimes... I had the P0420, which started after I installed the sliders and had to move the cat converters some to get the sliders to fit. So thinking a leak was causing that. The 171 is a lean condition, done the read-search and removed and...

well here is another one of these threads lol