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Po1706 lean bank one

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Posted on Jan 02, 2017

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SOURCE: What causes the computer to read bank 1 to lean,

More than likely you have a vaccume leak.Check arround the intake looking for any broken vac.hoses(especally the PCV hose) all the way up to where it connects to the intake.Could be a bad mass airflow sensor, but more likely a vac. leak.

Posted on Apr 21, 2011

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