The yellow light CHECK on the dask board , it's a FUEL BANK 1 TOO RICH.

Asked by kcio Dec 24, 2014 at 09:07 AM about the 1999 Honda Accord EX V6

Question type: Maintenance & Repair

A maintenance guy at work used the o b 2 scanner and says it was a FUEL BANK 1 TOO RICH. It could be the gas came down too fast or something, so reset the light. But it went on again the end of the day.
What is it the problem? It is Christmas Eve, the car needs to be used, no garage opens until after Christmas.

1 Answer
24,955

Mark answered 9 years ago

Bank 1 will be the side of the 1,3,5 cylinders. The O2 sensor on that side is detecting a lack of oxygen in the exhaust. You may have an airflow issue on the intake side or the MAF Sensor needs to be cleaned. You can clean it with electronics cleaner or you can purchase a MAF Sensor cleaner at the auto parts store. Also try running fuel injector cleaner through the fuel system. I don't think you have a serious issue, but it could turn into one as it will affect other components like the catalytic converter if it's not taken care of.

Mark helpful

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