P2096 and P0171 codes

2010 MAZDA 3
150,000 MILES • 2.0L • 4 CYL • 2WD • AUTOMATIC
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PAUL COLALUCA JR
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"too lean" pre and post catalytic converter. Before I have anything replaced, what can I do? Example, clean MAF sensor, replace air filter, check air cleaner box seal?
Aug 10, 2016 at 12:25 AM
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SATURNTECH9
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I would be looking for a vacuum leak they are usually the cause of lean codes.
Aug 10, 2016 at 7:12 AM