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  1. Infamous P0171 CEL Code

    Problems and Service
    2005 Chevy Cobalt 2.2L 4 Cylinder P0171 System too lean Bank 1 Both o2 sensors have been changed. Car has been checked for any vacuum leaks and none have been found. Only other option I've been given is that it's either the MAF or that it could be the 4 o rings inside the intake manifold...
  2. Running to Lean P0171

    Problems and Service
    I have a 06 Chevy Cobalt LT 2.2 automatic and i cannot figure out for the life of me why this check engine light keeps coming on. I have checked for any leaks that could cause this, and did not find any. I bought the car a year ago with this problem and about 3 or so months ago i was visiting...
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