2015 Ford F150 P0420 Code
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System Too Lean (P0171, P0174) - Vacuum Leak Quick Test - Ford 5.4
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I have a 98 ford f-150 4.2l throwing p0300 p0171 p0174 codes. the checkFord f150 p0420: catalyst system efficiency → below threshold → bank 1 P0171 p0174 vacuum leak lean scannerdanner.
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