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Old 10-14-2002, 13:12   #1 (permalink)
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Join Date: May 2001
Posts: 5
Need help troubleshooting codes

I have two trouble codes that keep coming up on my '95 GM with 96k miles. 171 (system too lean bank 1) and 174 (system too lean bank 2) Any help would be greatly appreciated.
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Old 10-17-2002, 13:22   #2 (permalink)
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I have cleaned the maf, but am still getting the two codes.
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Old 01-25-2003, 08:42   #3 (permalink)
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Location: Norwood, OH
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The O2 sensors could be reading wrong. When I had the Lean codes in my Marquis replacing them did the trick.

Ray
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