The engine P1884 the key thing to check is to verify the operation of the VCT solenoid. You are looking for a penetrating or stuck VCt solenoid valve produced by effluence. Mention to vehicle exact repair manual to perform module tests for the VCT unit. You should not use wrong meaning of the code for fixing the car engine. If you know how the car engine code is important, you also know the importance of the car engine code’s meaning. Do not solve the car engine in wrong way, you may face different problems in the car engine for solving or using wrong meaning of the car engine code.