The engine code P247D OBD2 may also be activated by faults earlier down the line. For example, a dirty or faulty MAF sensor might be producing the car to overreact in its fuel-trim adjustments. So, oxygen sensors are likely to report fuel combination problems. Do not use automobile dictionary meaning of the code for solving the car engine problem. The automobile meaning of the engine code is p for Powertrain Code – Problem is related engine, transmission and emissions systems. 2 for MFG – Manufacturer Specific. 4 for Fuel And Air Metering (Injector Circuit Malfunctions Only). 7 for Exhaust Gas Recirculation System Valve 1 and D for TFP Valve Position Switch-Drive Without Drive Ratio.