code 4-5 rich mixture - Maintenance and Repair Forum

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code 4-5 rich mixture
Saturday, September 03, 2005 3:36 PM
my 90 sunbird set this after idling for about 5 mins today. should i just replace the 02 sensor? i believe that it IS actually running rich, i can smell it. anything else i can check before i throw a new o2 at it?

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