You need to check the symptoms of the car engine problem what is related with the engine P0495 Code. Those symptoms are Engine overheating, Engine noises, Poor performance, Engine misfiring, Stalling and Poor fuel mileage. You will get different causes of the car engine problem and those potential causes are Broken or damaged wiring harness, Malfunctioning fan clutch, Cooling fan clutch or bearing defective, Cooling fan relay defective, ECM issue and Pin/connector problem (e.g. corrosion). Follow the right way for solving the car engine. Make sure that the let engine is cold, chalk wheels is ok and it has personal protective equipment.