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 Accent LFACTORY OEM SERVICE PROCEDURE
Engine Controls - Self-Diagnostics
- Introduction
- Self-Diagnostic System
- Diagnostic Trouble Code Definitions
- Engine Control Module (ECM) Location
- Summary
- Intermittent Diagnostic Trouble Codes
- Connector Identification
- Diagnostic Tests
- Notes
- DTC P0102 Or P0103: Mass Airflow (MAF) Sensor (1.5L)
- DTC P0106, P0107 Or P0108: Manifold Absolute Pressure (Map) Sensor (1.6L)
- DTC P0111, P0112 Or P0113: Intake Air Temperature (IAT) Sensor Malfunction (1.5L)
- DTC P0116, P0117 Or P0118: Engine Coolant Temperature (ECT) Sensor
- DTC P0121, P0122 Or P0123: Throttle Position (TP) Sensor (1.5L)
- DTC P0130 Or P0136: Heated Oxygen Sensor (Ho2S) Circuit Malfunction
- DTC P0131 Or P0137: Heated Oxygen Sensor (Ho2S) Circuit Low Voltage
- DTC P0132 Or P0138: Heated Oxygen Sensor (Ho2S) Circuit High Voltage
- DTC P0133 Or P0134: Front Heated Oxygen Sensor (Ho2S) Circuit Slow Response Or No Activity Detected
- DTC P0135 Or P0141: Heated Oxygen Sensor (Ho2S) Heater Circuit Malfunction
- DTCs P0201, P0202, P0203 & P0204: CYLINDERS NO. 1-4 INJECTOR CIRCUIT MALFUNCTION
- DTC P0300: Random Misfire Detected
- DTC P0301, P0302, P0303 & P0304: Cylinders No. 1-4 Misfire Detected
- DTC P0326: Knock Sensor (KS) Range
- DTC P0335 Or P0336: Crankshaft Position (CKP) Sensor
- DTC P0342 Or P0343: Camshaft Position (CMP) Sensor
- DTC P0422: Catalyst Efficiency Below Threshold
- DTC P0441: Evaporative Emissions (EVAP) System Incorrect Purge Flow
- DTC P0442: Evaporative Emissions (EVAP) System Small Leak Detected
- DTC P0444 Or P0445: Evaporative Emissions (EVAP) Purge Control Valve
- DTC P0455: Evaporative Emissions (EVAP) System Large Leak Detected
- DTC P0501: Vehicle Speed Sensor (VSS) Malfunction
- DTC P0506 Or P0507: Idle Rpm Is Not As Expected
- DTC P0562 Or P0563: Power Supply
- DTC P1123, P1124, P1127, Or P1128: Fuel Trim Malfunction
- DTC P1401, P1402, Or P1403: Diagnostic Module-Tank Leakage (Dm-TL) Malfunction
- DTC P1510 Or P1552: Idle Speed Control (ISC) Actuator Circuit Shorted
- DTC P1513 Or P1553: Idle Speed Control (ISC) Actuator Circuit Open
- DTC P1586: Transmission Encoding Signal Not Rational
- DTC P1605 Or P1606: Acceleration Sensor
- DTC P1611 Or P1613: Malfunction Indicator Light (Mil) Request Signal Circuit
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.