The engine P0145 engine code is a kind of powertrain problem and this problem is not very difficult to solve. The deactivation of cylinders is attained by liberating a synchronizer pin that generally interlocks the cam follower and rocker arms. The engine P0145 code resolves the synchronizer pin is free using hydraulic weight which is skillful by a devoted solenoid. The catalytic converter has an oxygen sensor in front and behind it. When the vehicle is hot and running in locked loop mode, the upstream oxygen sensor waveform reading should alter. Once the car engine is fixed, take the car for an assessment.