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This error is for a speed sensor signal malfunction meaning one or more of the wheel speed sensors are not reporting speed to the abs module.Disconnect negative battery cable for 5 minuets and reconnect to see if code returns sometimes this code can be produced if wheels are spinning fast in a situation like being stuck. Thanks for your time.
Sorryi wasn't aware you already have cleared the code.bb is not a lean code ,the check engine light would be on lean is P0171,bb stands for brake booster so that is where the problem lies.i would love to help more if you wish ,thanks
CODE PO500 SENSOR. PUT IN NEW WHEEL BEARINGS. ON BOTH