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 BASEREPAIR AND DIAGNOSISENGINE PERFORMANCESYSTEMENGINE CONTROL SYSTEM DIAGNOSIS (1 OF 2)
2003 Hyundai XG350 Base
Engine Control System Diagnosis (1 Of 2)
2003 Hyundai XG350 BaseSECTION Engine Control System Diagnosis (1 Of 2)
- Introduction
- Self-Diagnostic System
- Powertrain Control Module Location
- Intermittent Diagnostic Trouble Codes
- Connector Terminal Identification
- Diagnostic Trouble Code Definitions
- Summary
- Diagnostic Tests
- Notes
- DTC P0101: Mass Air Flow Circuit Range/Performance
- DTC P0102: Mass Or Volume Air Flow Circuit Low Input
- DTC P0103: Mass Or Volume Air Flow Circuit High Input
- DTC P0106: Manifold Absolute Pressure Circuit Range/Performance
- DTC P0107: Manifold Absolute Pressure Circuit Low Input
- DTC P0108: Manifold Absolute Pressure Circuit High Input
- DTC P0112: Intake Air Temperature Sensor 1 Circuit Low Input
- DTC P0113: Intake Air Temperature Sensor 1 Circuit High Input
- DTC P0116: Engine Coolant Temperature Circuit Range Performance Problem
- DTC P0117: Engine Coolant Temperature Circuit Low Input
- DTC P0118: Engine Coolant Temperature Circuit High Input
- DTC P0120: Throttle Pedal Position Sensor A Circuit
- DTC P0121: Throttle Pedal Position Sensor A Circuit Range/Performance
- DTC P0122: Throttle Pedal Position Sensor A Circuit Low Input
- DTC P0123: Throttle Pedal Position Sensor A Circuit High Input
- DTC P0125: Insufficient Coolant Temperature For Closed Loop Fuel Control
- DTC P0128: Coolant Thermostat Stuck Opened
- DTC P0130: Ho2S Circuit (Bank 1 - Sensor 1)
- DTC P0131: Ho2S Circuit Low Voltage (Bank 1 - Sensor 1)
- DTC P0132: Ho2S Circuit High Voltage (Bank 1 - Sensor 1)
- DTC P0133: Ho2S Circuit Slow Response (Bank 1 - Sensor 1)
- DTC P0134: Ho2S Circuit No Activity Detected (Bank 1 - Sensor 1)
- DTC P0135: Ho2S Heater Open/Short (Bank 1 - Sensor 1)
- DTC P0136: Ho2S Circuit (Bank 1 - Sensor 2)
- DTC P0137: Ho2S Circuit Low Voltage (Bank 1 - Sensor 2)
- DTC P0138: Ho2S Circuit High Voltage (Bank 1 - Sensor 2)
- DTC P0139: Ho2S Circuit Slow Response (Bank 1 - Sensor 2)
- DTC P0140: Ho2S Circuit No Activity Detected (Bank 1 - Sensor 2)
- DTC P0141: Ho2S Heater Open/Short (Bank 1 - Sensor 2)
- DTC P0150: Ho2S Circuit (Bank 2 - Sensor 1)
- DTC P0151: Ho2S Circuit Low Voltage (Bank 2 - Sensor 1)
- DTC P0152: Ho2S Circuit High Voltage (Bank 2 - Sensor 1)
- DTC P0153: Ho2S Circuit Slow Response (Bank 2 - Sensor 1)
- DTC P0154: Ho2S Circuit No Activity Detected (Bank 2 - Sensor 1)
- DTC P0155: Ho2S Heater Open/Short (Bank 2 - Sensor 1)
- DTC P0156: Ho2S Circuit (Bank 2 - Sensor 2)
- DTC P0157: Ho2S Circuit Low Voltage (Bank 2 - Sensor 2)
- DTC P0158: Ho2S Circuit High Voltage (Bank 2 - Sensor 2)
- DTC P0159: Ho2S Circuit Slow Response (Bank 2 - Sensor 2)
- DTC P0160: Ho2S Circuit No Activity Detected (Bank 2 - Sensor 2)
- DTC P0161: Ho2S Heater Open/Short (Bank 2 - Sensor 2)
- DTC P0171: System Too Lean (Bank 1)
- DTC P0172: System Too Rich (Bank 1)
- DTC P0174: System Too Lean (Bank 2)
- DTC P0175: System Too Rich (Bank 2)
- DTC P0181: Fuel Temp Sensor A Circuit Range/Performance
- DTC P0182: Fuel Temp Sensor A Circuit Low Input
- DTC P0183: Fuel Temp Sensor A Circuit High Input
- DTC P0201: Injector Circuit Open - Cylinder 1
- DTC P0202: Injector Circuit Open - Cylinder 2
- DTC P0203: Injector Circuit Open - Cylinder 3
- DTC P0204: Injector Circuit Open - Cylinder 4
- DTC P0205: Injector Circuit Open - Cylinder 5
- DTC P0206: Injector Circuit Open - Cylinder 6
- DTC P0220: Throttle Pedal Position Sensor B Circuit
- DTC P0222: Throttle Position Sensor B Circuit Low Input
- DTC P0223: Throttle Position Sensor B Circuit High Input
- DTC P0224: Throttle Position Sensor B Linearity
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.