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Reply To: Z71 starting problems: code P0174

March 2, 2023 at 11:16 am #749613
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That code is showing a lean condition on bank 2 and when an engine is cold the parts contract but when it gets hot it expands and that could be a vacuum leak. If you removed any of the intake system or parts that are attached, they may now be causing your problem. Could also be a map sensor. If you also get a p0171 then it is more than likely an intake leak.

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