code 0171 keeps popping up

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08-09-2007, 07:27 PM

Watsonr

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code 0171 keeps popping up

Keep getting code 0171, lean bank 1 and then 1 time code 1131,
lack of HO2S11 Switch, indicates lean. Runs rough until I clear the code and may run a week without the code then here it comes again. Any help?

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08-10-2007, 08:49 AM

projectSHO89

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You have either a vacuum leak or a bad O2 sensor (or both).

Identify your engine.

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08-12-2007, 09:58 AM

Watsonr

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Thanks

Thanks for your help, I was leaning toward bad O2. Checked for a leak and didn't find one. It indicated only one side and not both, didn't make sense just one side. Thanks again
Randy