arkhamfallout
TYF Newbie
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- Dec 4, 2023
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Hello, first time posting. My brother in-laws Yukon started getting the P0171 and P0174 codes the other day so we cleaned the MAF sensor and the throttle body as well as replaced the engine air filter but the codes came back (he cleared them). Then he got the P0300 code soon after. The car runs just fine and he feels no loss of power from before he got the codes. The only thing he did mention is that when he remote starts it on a cold start, it sounds like it struggles for a second but then it's smooth. We made sure all the intake connections were tight and secure as well. He just bought the car a few months ago and isn't sure what was done recently, I believe the fuel pump was replaced a few months ago. We are looking to replace the spark plugs this weekend to see if that helps with the misfire code but for the P0171 code would something like this help figure out where there might be a vacuum leak? https://www.harborfreight.com/fuel-pump-and-vacuum-tester-62637.html
I have a basic scan tool and was able to pull some of the live data so I will try to attach it here or include it in the post if it helps. At one point there is a spike to 2000 RPM and that was just him accelerating to see if that also helps with a different RPM data set.
Any help would be appreciated!
I have a basic scan tool and was able to pull some of the live data so I will try to attach it here or include it in the post if it helps. At one point there is a spike to 2000 RPM and that was just him accelerating to see if that also helps with a different RPM data set.
Any help would be appreciated!