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Why does the 'check engine' light keep coming on?
2007 Hyundai Entourage

Why does the 'check engine' light keep coming on?

(2007 Hyundai Entourage)

Had it tested by an engine analyzer. It showed the codes: P0171 and P0174. What are those numbers telling me?
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on April 21, 2015
Lean Bank #1 and Bank #2, Check For UnMetered Air
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on April 21, 2015
Lean Bank #1 and Bank #2, Check For UnMetered Air
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on April 21, 2015
It means one of two things. If the code showed up while driving at speed, it may be a fuel delivery problem. If the code showed up while idling, it is probably a vacuum leak of some kind. Look at the freeze frame data of the codes to figure out which direction you need to go.
The easiest thing to do would be to inspect and smoke the intake (cigar or smoke machine) to find a vacuum leak.
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on April 22, 2015
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