Thread: How to diagnose 'check engine' light?
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Old 07-23-2006, 04:54 PM
e430guy e430guy is offline
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Join Date: Apr 2004
Location: California
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I found the port, went to AutoZone and scanned. 2 codes came up: P0170, & P0173, which refer to 'fuel trim malfunction', banks 1 & 2. I'm thinking this is the O2 sensors, but how to dianose from here?
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