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p0171

  1. OEM Issues
    Hello Nation, This is my second discussion on this forum and i need help regarding this code, i have had it for a while and i'm trying to figure out that's triggering it, my truck is a 2004 Trailblazer LT and here's what i did so far: *I have cleaned the throttle body and replaced the seal...
  2. OEM Issues
    I tried Google and these forums but have been unable to find anyone with similar symptoms. Here's what I have: 2002 Trailblazer LTZ 4wd, 230,xxx miles SES light recently came on and produced codes P0171 and P0130. Poor fuel economy. NO driving issues at idle or while moving. While idling, I...
  3. General
    So I have been noticing some rough brake performance at times, and an on again off again P0171 MIL on my 06 TB. It runs perfectly fine sometimes, but others it does. There's a small high pitched noise under the hood, not sure from where though. The brake booster isn't making any noise though as...
  4. General
    I have been trying to get rid of a p0171 code replaced o2 ,fuel injectors (factory) cleaned throttle body checked for gasket and vac leaks cleaned mass airflow only symptom i get before the code is after 36 to 40 mile highway drive shut down and wont start at first i have to tap the peddle to...
  5. OEM Issues
    The wife's 2004 LS is having issues stalling out while driving and when stopped at lights, both issues are intermittent and doesn't happen on every trip. I pulled the codes and it has P0171 and P0420, what stumps me is the fact that P0420 is not supposed to be able to run if P0171 is set: DTC...
  6. OEM Issues
    Hello all. First time poster here, located in Ontario. I am no auto mechanic, but I am somewhat familiar with electrical & mechanical. I have come seeking help on a 2007 TrailBlazer LS 4.2L 4x4. 135000km. It is showing code P0171 (Lean Bank 1). Long Term Fuel Trim running 10%-28%. Also...
  7. OEM Issues
    I know this question has been posted and talked about a ton on here, I think I have looked at every post related to the p0171 code. I have replaced a non responsive O2 sensor, cleaned the TB, the MAF, used fuel injection cleaner, checked for vacuum leaks with a gauge and both propane and carb...
  8. OEM Issues
    Hello guys, first of all sorry for my written English it is not perfect because I'm from other country. I need help to solve my problem which is that I can't start the engine. Story is... Couple of months ago I decide to install an LPG installation for my 2005 trailblazer 4.2 LS. After...
  9. General
    Howdy all, Thought I'd jump right in here finally w/my first post and talk codes. Last week P0171 & 0131 popped up on the scanner for MAF & O2 sensors, respectively, I believe. Was wondering if there tends to be any relation between the two, ie, deal w/one first and that may take care of the...
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