Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSHYUNDAI2003XG350 LREPAIR AND DIAGNOSISENGINE PERFORMANCESYSTEMENGINE CONTROL SYSTEM DIAGNOSIS (2 OF 2)
2003 Hyundai XG350 L
Engine Control System Diagnosis (2 Of 2)
2003 Hyundai XG350 LSECTION Engine Control System Diagnosis (2 Of 2)
- Diagnostic Trouble Code Definitions
- Diagnostic Tests
- DTC P0300: Random Multiple Cylinder Misfire Detected
- DTC P0301: Cylinder 1 - Misfire Detected
- DTC P0302: Cylinder 2 - Misfire Detected
- DTC P0303: Cylinder 3 - Misfire Detected
- DTC P0304: Cylinder 4 - Misfire Detected
- DTC P0305: Cylinder 5 - Misfire Detected
- DTC P0306: Cylinder 6 - Misfire Detected
- DTC P0320: Ignition - Distributor Engine Speed Input Circuit
- DTC P0325: Knock Sensor 1 Circuit
- DTC P0335: Crankshaft Position Sensor A Circuit
- DTC P0340: Camshaft Position Sensor A Circuit
- DTC P0350: Ignition Coil Primary - Secondary Circuit
- DTC P0401: Exhaust Gas RECIRCULATION Flow Insufficient Detected
- DTC P0403: Exhaust Gas RECIRCULATION Control Circuit
- DTC P0421: Warm Up Catalyst Efficiency Below Threshold (Bank 1)
- DTC P0431: Warm Up Catalyst Efficiency Below Threshold (Bank 2)
- DTC P0441: EVAP Emission System Incorrect Purge Flow
- DTC P0442: EVAP Emission System - Leak Detected (Small Leak)
- DTC P0443: EVAP Emission System - Purge CTRL. Valve Circuit
- DTC P0446: EVAP Emission System - Vent Control Circuit
- DTC P0451: EVAP Emission System - Pressure Sensor Range/Performance
- DTC P0452: EVAP Emission System - Pressure Sensor Low Input
- DTC P0453: EVAP Emission System - Pressure Sensor High Input
- DTC P0455: EVAP Emission System - Leak Detected (Large Leak)
- DTC P0456: EVAP Emission System - Leak Detected (Very Small Leak)
- DTC P0460: Fuel Level Sensor Circuit
- DTC P0461: Fuel Level Sensor A Circuit Range/Performance
- DTC P0462: Fuel Level Sensor A Circuit Low Input
- DTC P0463: Fuel Level Sensor A Circuit High Input
- DTC P0506: Idle Air Control System - Rpm Lower Than Expected
- DTC P0507: Idle Air Control System - Rpm Higher Than Expected
- DTC P0510: Closed Throttle Position Switch
- DTC P0551: Power Steering Pressure Sensor Circuit Range/Performance
- DTC P0560: System Voltage
- DTC P1110-P1171: Throttle Actuator Control System - Stuck Open
- DTC P1110-P1172: Improper Motor Current - ETS
- DTC P1110-P1173: Improper Motor Voltage - ETS
- DTC P1110-P1174: Throttle Actuator Control System - Stuck Closed
- DTC P1110-P1175: Throttle Actuator Control System - Stuck Closed
- DTC P1118-P1176: Throttle Actuator Control Motor Circuit Low
- DTC P1118-P1177: Throttle Actuator Control Motor Circuit High
- DTC P1118-P1178: ETS Relay - Mal
- DTC P1155: Limp Home Valve - Mal
- DTC P1159: Variable Intake Motor Rotation SNS
- DTC P1192: ETS Limp Home - Target Following Malfunction
- DTC P1193: ETS Limp Home - Low Rpm
- DTC P1194: ETS Limp Home - TPS2 Malfunction
- DTC P1195: ETS Limp Home - Target Following Delay
- DTC P1196: ETS Limp Home - Closed Throttle Stuck
- DTC P1330: Spark Timing Adjust
- DTC P1607: ECM-ETS Communication Line - Malfunction (Ems-ETS)
- DTC P1608: ECM-ETS Communication Line - Malfunction (ETS-Ems)
- DTC P1613: Computer Communication Ems-ETS Malfunction
- DTC P1614: ETS Ecu - Malfunction (EEPROM R/W)
- DTC P1615: Computer Communication ETS-Ems Malfunction
- DTC P2120: Acceleration Position Sensor 1 Circuit
- DTC P2122: Acceleration Position Sensor 1 Circuit Low Input
- DTC P2123: Acceleration Position Sensor 1 Circuit High Input
- DTC P2125: Acceleration Position Sensor 2 Circuit
- DTC P2127: Acceleration Position Sensor 2 Circuit Low Input
- DTC P2128: Acceleration Position Sensor 2 Circuit High Input
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.