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Discussion Starter · #1 ·
Hi,

I am trying to diagnose a PO171.

A high long term fuel trim ( >30 %) is setting the check engine light.

No air/vacuum leaked detected. PCV and O2 sensors check out.

Trying to figure out if the MAF is faulty. Disconnected it with engine running and engine kept running (increased revs). Does this confirm a faulty MAF?

Thank you.

Holden Cruze 2011 1.4 Turbo AT 99000 Kms
 

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2014 LT program car, Pull Me Over Red, 1.4T Auto
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