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
Engine Controls - Self-Diagnostics
- Introduction
- Self-Diagnostic System
- Diagnostic Trouble Code (DTC) Definitions
- Powertrain Control Module (Pcm) Location
- Summary
- Intermittent Diagnostic Trouble Codes
- Connector Terminal Identification
- Diagnostic Tests
- Notes
- DTC P0101, P0102 Or P0103: Mass Airflow (MAF) Sensor Circuit
- DTC P0112 Or P0113: Intake Air Temperature (IAT) Circuit
- DTC P0115, P0116 Or P0125: Engine Coolant Temperature (ECT) Circuit
- DTC P0120, P0122 Or P0123: Throttle Position (TP) Sensor Circuit (With Electronic Throttle System)
- DTC P0132, P0133, P0134, P0150, P0152 Or P0154: Front Ho2S Circuit Malfunction
- DTC P0135 Or P0155: Front Ho2S Heater Circuit Malfunction
- DTC P0136, P0139, P0140, P0156, P0159 Or P0160: Rear Ho2S Circuit Malfunction
- DTC P0141 Or P0161: Rear Ho2S Heater Circuit Malfunction
- DTCs P0201, P0202, P0203, P0204, P0205 OR P0206: CYLINDERS NO. 1-6 FUEL INJECTOR CIRCUIT MALFUNCTION
- DTC P0300: Random Misfire Detected
- DTCs P0301, P0302, P0303, P0304, P0305 & P0306: CYLINDERS NO. 1-6 MISFIRE DETECTED
- DTC P0335: Crankshaft Position (CKP) Sensor Circuit Malfunction
- DTC P0340: Camshaft Position (CMP) Sensor Circuit Malfunction
- DTC P0421 Or P0431: Warm-Up Catalytic Converter Efficiency Below Threshold
- DTC P0443: Purge Control Solenoid Valve Malfunction
- DTC P0500: Vehicle Speed Sensor (VSS) Malfunction
- DTC P1100, P1102 Or P1103: Manifold Absolute Pressure (Map) Sensor Circuit Malfunction
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
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.