The diagnosis B1386 Code is a description of the problem of the engine. Maybe the problem triggers from the body of the engine. According to the model and manufacturer, the meaning of the code is changed. it seems that probably the code would be worthy for the carefully inspection the wire connection near the consumption manifold bracket. This is completed the most easily from under the car in the zone near the oil filter. A test drive is always suggested after you have finished any maintenances to see if the state is secure. If you face again any problem, then you should check it.