You must solve all problems from the car engine and you should solve the problem by an expert automobile technician. The car engine code is found after testing the car engine and without getting the actual meaning of the code, it is not possible to solve the car engine fast. You also need to test the car engine manually. This car engine P2850 Code has several meanings and you must use the right meaning of the code. However, if you do not get the right meaning of the code, you may use general meaning for solving the car engine problem.