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.
2001 Hyundai XG300 BaseFACTORY OEM SERVICE PROCEDURE
Diagnostic Trouble Code (DTC) Definitions
See DIAGNOSTIC TROUBLE CODE IDENTIFICATION table, then go to appropriate diagnostic procedure under DIAGNOSTIC TESTS .
DIAGNOSTIC TROUBLE CODE IDENTIFICATION
| DTC | Description | ||||||
|---|---|---|---|---|---|---|---|
| P0101 | Mass Airflow (MAF) Circuit Range/Performance Problem | ||||||
| P0102 | Mass Airflow (MAF) Circuit Voltage Low | ||||||
| P0103 | Mass Airflow (MAF) Circuit Voltage High | ||||||
| P0112 | Intake Air Temperature (IAT) Circuit Voltage Low | ||||||
| P0113 | Intake Air Temperature (IAT) Circuit Voltage High | ||||||
| P0115 | Engine Coolant Temperature (ECT) Circuit Malfunction | ||||||
| P0116 | Engine Coolant Temperature (ECT) Circuit Drift | ||||||
| P0120 | Electronic Throttle System (ETS) Main Throttle Position (TP) Sensor Circuit Malfunction | ||||||
| P0120/P0220 (1) | Electronic Throttle System (ETS) Throttle Position Sensor Property Malfunction | ||||||
| P0122 | Throttle Position (TP) Sensor Circuit Voltage Low | ||||||
| P0123 | Throttle Position (TP) Sensor Circuit Voltage High | ||||||
| P0125 | Excessive Time To Enter Closed Loop Control (ECT Sensor) | ||||||
| P0128 (1) | Thermostat Malfunction | ||||||
| P0132 | Front HO2S Circuit Open (Bank 1) | ||||||
| P0133 | Front HO2S Circuit Slow Response (Bank 1) | ||||||
| P0134 | Front HO2S Circuit No Activity Detected (Bank 1) | ||||||
| P0135 | Front HO2S Heater Circuit Malfunction (Bank 1) | ||||||
| P0136 | Rear HO2S Circuit Open (Bank 1) | ||||||
| P0139 | Rear HO2S Circuit Range/Performance Problem (Bank 1) | ||||||
| P0140 | Rear HO2S Circuit Short (Bank 1) | ||||||
| P0141 | Rear HO2S Heater Circuit Malfunction (Bank 1) | ||||||
| P0150 | Front HO2S Circuit Slow Response (Bank 2) | ||||||
| P0152 | Front HO2S Circuit Open (Bank 2) | ||||||
| P0154 | Front HO2S Circuit No Activity Detected (Bank 2) | ||||||
| P0155 | Front HO2S Heater Circuit Malfunction (Bank 2) | ||||||
| P0156 | Rear HO2S Circuit Open (Bank 2) | ||||||
| P0159 | Rear HO2S Circuit Range/Performance Problem (Bank 2) | ||||||
| P0160 | Rear HO2S Circuit Short (Bank 2) | ||||||
| P0161 | Rear HO2S Heater Circuit Malfunction (Bank 2) | ||||||
| P0171 (1) | Fuel System Too Lean (Bank 1) | ||||||
| P0172 (1) | Fuel System Too Rich (Bank 1) | ||||||
| P0174 (1) | Fuel System Too Lean (Bank 2) | ||||||
| P0175 (1) | Fuel System Too Rich (Bank 2) | ||||||
| P0201 | Fuel Injector No. 1 Circuit Malfunction | ||||||
| P0202 | Fuel Injector No. 2 Circuit Malfunction | ||||||
| P0203 | Fuel Injector No. 3 Circuit Malfunction | ||||||
| P0204 | Fuel Injector No. 4 Circuit Malfunction | ||||||
| P0205 | Fuel Injector No. 5 Circuit Malfunction | ||||||
| P0206 | Fuel Injector No. 6 Circuit Malfunction | ||||||
| P0300 (3) | Random Misfire Detected | ||||||
| P0301 (3) | Cylinder No. 1 Misfire Detected | ||||||
| P0302 (3) | Cylinder No. 2 Misfire Detected | ||||||
| P0303 (3) | Cylinder No. 3 Misfire Detected | ||||||
| P0304 (3) | Cylinder No. 4 Misfire Detected | ||||||
| P0305 (3) | Cylinder No. 5 Misfire Detected | ||||||
| P0306 (3) | Cylinder No. 6 Misfire Detected | ||||||
| P0320 (1)(2) | Ignition Failure Sensor Malfunction | ||||||
| P0325 (1)(2) | Knock Sensor Circuit Malfunction | ||||||
| P0335 | Crankshaft Position (CKP) Sensor Circuit Malfunction | ||||||
| P0340 | Camshaft Position (CMP) Sensor Circuit Malfunction | ||||||
| P0350 (1) | Ignition Coil Malfunction | ||||||
| P0401 (1) | EGR System Malfunction | ||||||
| P0403 (1) | EGR Solenoid Circuit Malfunction | ||||||
| P0421 | Warm-Up Catalytic Converter Efficiency Below Threshold (Bank 1) | ||||||
| P0431 | Warm-Up Catalytic Converter Efficiency Below Threshold (Bank 2) | ||||||
| P0441 (1) | Stuck Purge Control Solenoid Valve | ||||||
| P0442 (1) | EVAP System Small Leak Detected | ||||||
| P0443 | Purge Control Solenoid Valve Malfunction | ||||||
| P0446 (1) | Canister Close Valve Malfunction | ||||||
| P0451 (1) | Fuel Tank Pressure Sensor Voltage Sloshing | ||||||
| P0452 (1) | Fuel Tank Pressure Sensor Voltage Low | ||||||
| P0453 (1) | Fuel Tank Pressure Sensor Voltage High | ||||||
| P0455 (1) | EVAP System Large Leak Detected | ||||||
| P0500 | Vehicle Speed Sensor (VSS) Malfunction | ||||||
| P0510 (1) | Idle Switch Malfunction | ||||||
| P1100 | Manifold Absolute Pressure (MAP) Sensor Circuit Malfunction | ||||||
| P1102 | Manifold Absolute Pressure (MAP) Sensor Circuit Voltage Low | ||||||
| P1103 | Manifold Absolute Pressure (MAP) Sensor Circuit Voltage High | ||||||
| P1110/P1171 (1) | Electronic Throttle System (ETS) Circuit Open | ||||||
| P1110/P1172 (1) | Electronic Throttle System (ETS) Motor Current | ||||||
| P1110/P1173 (1) | Electronic Throttle System (ETS) Rationality Malfunction | ||||||
| P1110/P1174 (1) | Electronic Throttle System (ETS) No. 1 Close Malfunction | ||||||
| P1110/P1175 (1) | Electronic Throttle System (ETS) No. 2 Close Malfunction | ||||||
| P1118/P1176 (1) | Electronic Throttle System (ETS) Motor No. 1 Malfunction | ||||||
| P1118/P1177 (1) | Electronic Throttle System (ETS) Motor No. 2 Malfunction | ||||||
| P1118/P1178 (1) | Electronic Throttle System (ETS) Motor Battery Voltage Open | ||||||
| P1147 (1) | Electronic Throttle System (ETS) Sub Accel Position Sensor No. 1 Malfunction | ||||||
| P1151 (1) | Electronic Throttle System (ETS) Main Accel Position Sensor No. 2 Malfunction | ||||||
| P1147/P1151 (1) | Electronic Throttle System (ETS) Accel Position Sensor Property Malfunction | ||||||
| P1155 (1) | Electronic Throttle System (ETS) Limp Home Valve | ||||||
| P1159 (1)(2) | Variable Intake Motor Malfunction | ||||||
| P1330 (1) | Spark Timing Adjust Malfunction | ||||||
| P1521 (1) | Power Steering Switch Malfunction | ||||||
| P1607 (1) | Electronic Throttle System (ETS) Communication Error | ||||||
| P1614 (1) | Electronic Throttle System (ETS) Module Malfunction | ||||||
| P1632 (1)(2) | Traction Control System Malfunction | ||||||
|
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Factory Service Tools
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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.