You should test the car engine and the car engine P3465 Code is found from the car engine when the car engine was tested. If you want to fix the car engine, you need to know how to solve the car engine. Like the all the car engines, this car engine system services specially advanced hydraulic lifters which is known as switching roller followers for the engine P3465 code intake and finish valves. The lifters can be collapsed by undoing an inner locking pin. The locking pin is detached using solenoids to change oil pressure fed into the lifter. Finally, a test drive is recommended.