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GDI – Troubleshooting 13A-13 Code No. Reference page Diagnosis item P1221 Throttle valve position feedback system 13A-55 P1223 Communication line with throttle valve controller 13A-56 P1224 Throttle valve control servo motor (motor 1st phase malfunction) system 13A-57 P1225 Accelerator pedal position sensor (2nd channel) system 13A-58 P1228 Throttle valve control servo motor (motor 2nd phase malfunction) system 13A-60 P1500 Alternator FR terminal system 13A-61 P1515 Brake vacuum sensor system 13A-62 P1600 Communication wire with A/T-ECU system 13A-64 P1610 Immobilizer system 13A-64 NOTE Do not replace the engine-ECU until a through terminal check reveals there are no short/open circuit. 2. Check that the engine-ECU earth circuit is normal before checking for the cause of the problem. 3. After the engine-ECU has detected a malfunction, a diagnosis code is recorded the next time the ”, the diagnosis code is recorded on the first detection of the malfunction. 4. Sensor 1 indicates the sensor mounted at a position closest to the engine, and sensor 2 indicates |