The engine P2699 Code is also known as error code. You must check the car engine and check all car engine symptoms to know the cause of the car engine problem. Other than extreme black smoke upon acceleration, there will possibly be no comprehensible codes other than an illumined service car engine soon lamp and perhaps a stored trouble code. There are some common causes of the car engine problem and those are broken, burned, lose or corroded wiring and/or terminals and connectors are the most common reason of this error code bring stored. Until the car engine is ok, do not drive the car.