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- 03.5 YLW MSP
I just went upto the local autozone to read my CEL and it came up P0171 - bank 1 to lean.
Now the list of possible issues are large vac leak, bad 02 sensor, dirty defective MAF, or engine mech condition...
The MAF and O2 sensor arn't even 2 weeks old literally. My vac at idle is 20/21... So I have no idea what would cause this issue unless its due to bad seals at the throttle body shaft(boost leak tested to find this one).
Now the list of possible issues are large vac leak, bad 02 sensor, dirty defective MAF, or engine mech condition...
The MAF and O2 sensor arn't even 2 weeks old literally. My vac at idle is 20/21... So I have no idea what would cause this issue unless its due to bad seals at the throttle body shaft(boost leak tested to find this one).