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code p0171 will not go away after recommended fix code p0171 will not go away after recommended fix
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Old 05-12-2007, 02:30 PM
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code p0171 will not go away after recommended fix
Hello All,
I have a 2001 4.4 and I just did the crancase vent hoses , cleared the codes and now the SES light came back on with a p0171 code.system lean bank 1.
I have just done the MAF 3 months ago , and the cam position sensor on the intake side as well. I only have 35k miles on the X.
Could it be my fuel filter?
I have a AFE intake and that is it.
Thanks for any help!!!
Last edited by Dark BMW; 05-13-2007 at 08:54 PM.
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Old 05-13-2007, 08:03 PM
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Today the Lean bank 2 code showed up as well?
What Next??

Anyone
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Old 05-14-2007, 02:00 AM
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Tomorrow I am going to change the exhaust side cam sensor and hope that is the end of this.
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Old 05-14-2007, 03:20 PM
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I just did the exhaust side cam sensor and BAM!! the service engine light went on?

ANYONE????
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Old 05-14-2007, 04:51 PM
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In my experience ~85% of the prolblems stem from o2 sensors goi g or exhuast leaks.
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Old 05-21-2007, 02:15 PM
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Turns out my MAF went Bad!!!!
Fixed!!!
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Old 05-21-2007, 03:34 PM
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Are you putting too much oil on your AFE? The excessive oil can contaminate your MAF.
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Old 05-22-2007, 03:32 PM
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Never oiled it !
strange but it's over now, X5 runs like a champ
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