The engine P0266 Code is helpful for the car engineer to fix the car engine. Do not allow wrong meaning of the code for solving the car engine problem. The automobile engineer needs to know the way to solve the car engine problem. The automobile meaning of the code is found online. P is OBD-II Diagnostic Powertrain (P) Trouble Code For Engine. 0 for Intake Valve Control Solenoid Circuit Low. 2 for Engine Oil Temperature Sensor Malfunction. 6 for Cylinder 10 Contribution/balance Fault and 6 for Exhaust Gas Recirculation Sensor B Circuit High. When the car engine is ok, take it for a test drive.