The general meaning of the engine code p217a is P for Powertrain Code – Problem is related engine, transmission and emissions systems. 2 for MFG – Manufacturer Specific. 1 for Fuel And Air Metering 7 for Exhaust Gas Recirculation System Valve 1 and A for TFP Valve Position Switch-Drive Without Drive Ratio. You need to check the car engine to find the real cause of the car engine problem. The engine code 217A OBD2 exactly refers to the camshaft timing. In this case, if the cam timing is over-retarded, the engine light will be illuminated and the code will be set.