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Message: <blockquote data-quote="lyoung4379" data-source="post: 17102" data-attributes="member: 5551"><p>Hi, I had a P0171 code on my -06 Equinox, and tried a few different things, before it finally dawned on me the MAF sensor could well be the culprit.  If the MAF sensor is reading off, the engine thinks its getting an airflow which it's not actually getting. Therefore it schedules an incorrect amount of fuel into the engine.  So, I bought a new MAF at AutoZone and VOILA EUREKA - P0171 disappeared.  I took the old MAF and did a couple continuity checks across the wires, found one continuous and the other open.  Don't know if that's what the issue was, since I didn't have an electrical schematic; but the new MAF fixed my issue with P0171. Easy fix, too - about 45 mins to R2 the sensor.  Good Luck.</p></blockquote><p></p>