The automobile dictionary meaning for this P203E Code is available online and this code is a kind of powertrain problem what is not very difficult to solve. The process of fixing the car engine is the valves of individual cylinder are remained closed by a pair of arms that swap the conformist engine’s roller-type rocker arm. The engine P203e code is one of these arms follows the cam profile while the 2nd arm joins to the valves. During normal engine process the 2 arms are combined by a locking pin. Do not follow any wrong meaning of the code for solving the car engine trouble.