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 MANUALSHYUNDAI2003ELANTRA GLS, STANDARDREPAIR AND DIAGNOSISENGINE PERFORMANCESYSTEMENGINE CONTROLS - SELF-DIAGNOSTICSDIAGNOSTIC TROUBLE CODE DEFINITIONS
2003 Hyundai Elantra GLS, Standard
Diagnostic Trouble Code Definitions
2003 Hyundai Elantra GLS, StandardSECTION Diagnostic Trouble Code Definitions
DIAGNOSTIC TROUBLE CODE DEFINITIONS
| DTC | Description | ||||
|---|---|---|---|---|---|
| P0010 | CAMSHAFT POSITION - TIMING OVER-ADVANCED OR SYSTEM PERFORMANCE (BANK 1) | ||||
| P0030 | HO2S HEATER - HEATER CONTROL CIRCUIT (BANK 1/SENSOR 1) | ||||
| P0031 | HO2S HEATER CIRCUIT LOW (BANK 1/SENSOR 1) | ||||
| P0032 | HO2S HEATER CIRCUIT HIGH (BANK 1/SENSOR 1) | ||||
| P0036 | HO2S HEATER - HEATER CONTROL CIRCUIT (BANK 1/SENSOR 2) | ||||
| P0037 | HO2S HEATER CIRCUIT LOW (BANK 1/SENSOR 2) | ||||
| P0038 | HO2S HEATER CIRCUIT HIGH (BANK 1/SENSOR 2) | ||||
| P0076 | INTAKE VALVE CONTROL SOLENOID CIRCUIT LOW (BANK 1) | ||||
| P0077 | INTAKE VALVE CONTROL SOLENOID CIRCUIT HIGH (BANK 1) | ||||
| P0101 | MASS OR VOLUME AIR FLOW CIRCUIT RANGE PERFORMANCE PROBLEM | ||||
| P0102 | MASS OR VOLUME AIR FLOW CIRCUIT LOW INPUT | ||||
| P0103 | MASS OR VOLUME AIR FLOW CIRCUIT HIGH INPUT | ||||
| P0112 | INTAKE AIR TEMPERATURE CIRCUIT LOW INPUT | ||||
| P0113 | INTAKE AIR TEMPERATURE CIRCUIT HIGH INPUT | ||||
| P0116 | ENGINE COOLANT TEMPERATURE CIRCUIT RANGE PERFORMANCE | ||||
| P0117 | ENGINE COOLANT TEMPERATURE CIRCUIT LOW INPUT | ||||
| P0118 | ENGINE COOLANT TEMPERATURE CIRCUIT HIGH INPUT | ||||
| P0121 | THROTTLE PEDAL POSITION CIRCUIT RANGE PERFORMANCE PROBLEM | ||||
| P0122 | THROTTLE PEDAL POSITION CIRCUIT LOW INPUT | ||||
| P0123 | THROTTLE PEDAL POSITION CIRCUIT HIGH INPUT | ||||
| P0125 | INSUFFICIENT COOLANT TEMPERATURE FOR CLOSED LOOP FUEL CONTROL | ||||
| P0128 | COOLANT THERMOSTAT (COOLANT TEMP. BELOW THERMOSTAT REGULATING TEMP.) | ||||
| P0131 | HO2S CIRCUIT LOW INPUT (BANK 1/SENSOR 1) | ||||
| P0132 | HO2S CIRCUIT HIGH INPUT (BANK 1/SENSOR 1) | ||||
| P0133 | HO2S CIRCUIT SLOW RESPONSE (BANK 1/SENSOR 1) | ||||
| P0136 | HO2S CIRCUIT MALFUNCTION (BANK 1/SENSOR 2) | ||||
| P0137 | HO2S CIRCUIT LOW INPUT (BANK 1/SENSOR 2) | ||||
| P0138 | HO2S CIRCUIT HIGH INPUT (BANK 1/SENSOR 2) | ||||
| P0139 | HO2S CIRCUIT SLOW RESPONSE (BANK 1/SENSOR 2) | ||||
| P0140 | HO2S CIRCUIT NO ACTIVITY DETECTED (BANK 1/SENSOR 2) | ||||
| P0171 | FUEL TRIM MALFUNCTION - SYSTEM TOO LEAN (BANK 1) | ||||
| P0172 | FUEL TRIM MALFUNCTION - SYSTEM TOO RICH (BANK 1) | ||||
| P0196 | ENGINE OIL TEMP. SENSOR RANGE PERFORMANCE | ||||
| P0197 | ENGINE OIL TEMP. SENSOR LOW INPUT | ||||
| P0198 | ENGINE OIL TEMP. SENSOR HIGH INPUT | ||||
| P0261 | CYLINDER 1 - INJECTOR CIRCUIT LOW | ||||
| P0262 | CYLINDER 1 - INJECTOR CIRCUIT HIGH | ||||
| P0264 | CYLINDER 2 - INJECTOR CIRCUIT LOW | ||||
| P0265 | CYLINDER 2 - INJECTOR CIRCUIT HIGH | ||||
| P0267 | CYLINDER 3 - INJECTOR CIRCUIT LOW | ||||
| P0268 | CYLINDER 3 - INJECTOR CIRCUIT HIGH | ||||
| P0270 | CYLINDER 4 - INJECTOR CIRCUIT LOW | ||||
| P0271 | CYLINDER 4 - INJECTOR CIRCUIT HIGH | ||||
| P0300 (1) | MULTIPLE CYLINDER MISFIRE DETECTED | ||||
| P0301 (1) | CYLINDER 1 - MISFIRE DETECTED | ||||
| P0302 (1) | CYLINDER 2 - MISFIRE DETECTED | ||||
| P0303 (1) | CYLINDER 3 - MISFIRE DETECTED | ||||
| P0304 (1) | CYLINDER 4 - MISFIRE DETECTED | ||||
| P0325 (2) | KNOCK SENSOR 1 CIRCUIT MALFUNCTION | ||||
| P0335 | CRANKSHAFT POSITION SENSOR CIRCUIT MALFUNCTION | ||||
| P0340 | CAMSHAFT POSITION SENSOR CIRCUIT MALFUNCTION | ||||
| P0341 | CRANKSHAFT POSITION - CAMSHAFT POSITION CORRELATION (BANK 1) | ||||
| P0420 | CATALYST SYSTEM EFFICIENCY BELOW THRESHOLD (BANK 1) | ||||
| P0441 | EVAP EMISSION SYSTEM INCORRECT PURGE FLOW | ||||
| P0442 | EVAP EMISSION SYSTEM - LEAK DETECTED (SMALL LEAK) | ||||
| P0444 | EVAP EMISSION SYSTEM - PURGE CTRL. VALVE CIRCUIT OPEN | ||||
| P0445 | EVAP EMISSION SYSTEM - PURGE CTRL. VALVE CIRCUIT SHORTED | ||||
| P0447 | EVAP EMISSION SYSTEM - VENT CONTROL CIRCUIT OPEN | ||||
| P0448 | EVAP EMISSION SYSTEM - VENT CONTROL CIRCUIT SHORTED | ||||
| P0449 | EVAP EMISSION SYSTEM - VENT VALVE SOLENOID CIRCUIT | ||||
| P0451 | EVAP EMISSION SYSTEM - PRESSURE SENSOR RANGE PERFORMANCE | ||||
| P0452 | EVAP EMISSION SYSTEM - PRESSURE SENSOR LOW INPUT | ||||
| P0453 | EVAP EMISSION SYSTEM - PRESSURE SENSOR HIGH INPUT | ||||
| P0454 | EVAP EMISSION SYSTEM - PRESSURE SENSOR INTERMITTENT (DTP_NOISE) | ||||
| P0455 | EVAP EMISSION SYSTEM - LEAK DETECTED (LARGE LEAK) | ||||
| P0456 | EVAP EMISSION SYSTEM - LEAK DETECTED (VERY SMALL LEAK) | ||||
| P0501 | VEHICLE SPEED SENSOR RANGE PERFORMANCE | ||||
| P0506 | IDLE CONTROL SYSTEM - RPM LOWER THAN EXPECTED | ||||
| P0507 | IDLE CONTROL SYSTEM RPM HIGHER THAN EXPECTED | ||||
| P0560 | SYSTEM VOLTAGE MALFUNCTION | ||||
| P0562 | SYSTEM VOLTAGE LOW | ||||
| P0563 | SYSTEM VOLTAGE HIGH | ||||
| P0600 | SERIAL COMMUNICATION LINK MALFUNCTION | ||||
| P0605 | INTERNAL CONTROL MODULE READ ONLY MEMORY (ROM) ERROR | ||||
| P0606 | ECM PCM PROCESSOR (ECM - SELF TEST FAILED) | ||||
| P0650 | MALFUNCTION INDICATOR LAMP (MIL) CONTROL CIRCUIT MALFUNCTION | ||||
| P1166 | HO2S SYSTEM - LAMBDA CONTROLLER AT THE LIMIT (BANK 1) | ||||
| P1372 | SEGMENT TIME ACQUISITION INCORRECT | ||||
| P1505 | IDLE CHARGE ACTUATOR SIGNAL LOW OF COIL #1 | ||||
| P1506 | IDLE CHARGE ACTUATOR SIGNAL HIGH OF COIL #1 | ||||
| P1507 | IDLE CHARGE ACTUATOR SIGNAL LOW OF COIL #2 | ||||
| P1508 | IDLE CHARGE ACTUATOR SIGNAL HIGH OF COIL #2 | ||||
| P1529 | TCU REQUEST FOR MIL ON | ||||
| P1602 | CAN COMMUNICATION BUS WITH TCU (TIMEOUT) | ||||
| P2096 | POST CATALYST FUEL TRIM SYSTEM TOO LEAN (BANK 1) | ||||
| P2097 | POST CATALYST FUEL TRIM SYSTEM TOO RICH (BANK 1) | ||||
| P2195 | HO2S SIGNAL STUCK LEAN (BANK 1 SENSOR 1) | ||||
| P2196 | HO2S SIGNAL STUCK RICH (BANK 1/SENSOR 1) | ||||
| P2231 | HO2S SIGNAL CIRCUIT SHORTED TO HEATER CIRCUIT (BANK 1/SENSOR 1) | ||||
| P2237 | HO2S PUMPING CURRENT CIRCUIT OPEN (BANK 1/SENSOR 1) | ||||
| P2243 | HO2S REFERENCE VOLTAGE CIRCUIT OPEN (BANK 1/SENSOR 1) | ||||
| P2251 | HO2S REFERENCE GROUND CIRCUIT OPEN (BANK 1/SENSOR 1) | ||||
| P2270 | HO2S SIGNAL STUCK LEAN (BANK 1/SENSOR 2) | ||||
| P2271 | HO2S SIGNAL STUCK RICH (BANK 1/SENSOR 2) | ||||
| P2414 | HO2S EXHAUST SAMPLE ERROR (BANK 1/SENSOR 1) | ||||
| P2626 | HO2S PUMPING CURRENT TRIM CIRCUIT OPEN (BANK 1/SENSOR 1) | ||||
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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.