Chevy 1500, Codes

by Robert
(Homewood, IL)

My 1998 Chevy 1500 was struggling to start in mornings for a couple weeks. I popped up codes P0452, P0171, and P0174. Now truck won't start, could my problem be a bad fuel pump.

Steve Says,

Thanks for asking me your question. There are several things that could be happening here. The first thing that comes to mind and something that could account for all the codes is a vacuum leak in the evap system. Since you have an evap code (p0452) and lean fuel mixture codes (p0171, p0174) this could be causing the problem.

You definitely could have a fuel pump problem that is not building enough fuel pressure, or it could even be a fuel pressure regulator problem.

You need to buy a fuel pressure gauge to narrow this down. If the pressure is low then it is most likely a problem with the fuel pump if it is not then it might be a pressure regulator problem or even a vacuum problem.

I wish I could be more specific, but there is just not enough diagnostic information for me to help any more than that.

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