Thread: O2 Sensor?
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Old 05-18-2017, 08:45 PM   #13
steve99
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If your getting P219A lean condition then you have a problem with intake or exhaust leak or dirty maf or possibly o2 sensor fault. If you have only changed intake id start their and check for leaks incorrectly installed maf sensor their is a gasket under maf that is easily creased or torn. Clean maf with maf cleaner if you have oiled filter.

The code you would get for cat removed in header would be P0420
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