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.
2021 Hyundai Accent SELFACTORY OEM SERVICE PROCEDURE
Engine Control System DTCS
ENGINE CONTROL SYSTEM DIAGNOSTIC TROUBLE CODE IDENTIFICATION
| DTC | Description |
|---|---|
| DTC P000A | 00: 'A' Camshaft Position Slow Response Bank 1 |
| DTC P000B | 00: 'B' Camshaft Position Slow Response Bank 1 |
| DTC P0011 | 00: 'A' Camshaft Position-Timing Over-Advanced or System Performance |
| DTC P0014 | 00: 'B' Camshaft Position-Timing Over-Advanced or System Performance |
| DTC P0016 | 00: Crankshaft Position - Camshaft Position Correlation (Bank 1 Sensor A) |
| DTC P0017 | 00: Crankshaft Position - Camshaft Position Correlation (Bank 1 Sensor B) |
| DTC P0030 | 00: HO2S Heater Control Circuit (Bank 1/Sensor 1) |
| DTC P0031 | 00: HO2S Heater Circuit low (Bank 1/Sensor 1) |
| DTC P0032 | 00: HO2S Heater Circuit high (Bank 1/Sensor 1) |
| DTC P0036 | 00: HO2S Heater Control Circuit (Bank 1/Sensor 2) |
| DTC P0037 | 00: HO2S Heater Circuit low (Bank 1/Sensor 2) |
| DTC P0038 | 00: HO2S Heater Circuit high (Bank 1/Sensor 2) |
| DTC P0068 | 00: MAP/MAF - Throttle Position Correlation |
| DTC P0070 | 00: Ambient Air Temperature Sensor Circuit |
| DTC P0071 | 00: Ambient Air Temperature Circuit Range/Performance |
| DTC P0075 | 00: Intake Valve Control Solenoid Circuit |
| DTC P0076 | 00: Intake Valve Control Solenoid Circuit Low |
| DTC P0077 | 00: Intake Valve Control Solenoid Circuit High |
| DTC P0078 | 00: Exhaust Valve Control Solenoid Circuit |
| DTC P0079 | 00: Exhaust Valve Control Solenoid Circuit Low |
| DTC P0080 | 00: Exhaust Valve Control Solenoid Circuit High |
| DTC P00B7 | 00: Engine Coolant Flow Low/Performance |
| DTC P00BC | 00: Mass or Volume Air Flow 'A' Circuit Range/Performance - Air Flow Too Low |
| DTC P00BD | 00: Mass or Volume Air Flow 'A' Circuit Range/Performance - Air Flow Too High |
| DTC P00CE | 00: Intake Air Temperature Measurement System - Multiple Sensor Correlation Bank 1 |
| DTC P00D1 | 00: HO2S Heater Control Circuit Range/Performance Bank 1 Sensor 1 |
| DTC P00D2 | 00: HO2S Heater Control Circuit Range/Performance Bank 1 Sensor 2 |
| DTC P0100 | 00: Mass or Volume Air Flow Circuit |
| DTC P0101 | 00: Mass or Volume Air Flow Sensor 'A' Circuit Range/Performance |
| DTC P0106 | 00: Manifold Absolute Pressure/Barometric Pressure Circuit Range/Performance |
| DTC P0107 | 00: Manifold Absolute Pressure/Barometric Pressure Circuit Low Input |
| DTC P0108 | 00: Manifold Absolute Pressure/Barometric Pressure Circuit High Input |
| DTC P0111 | 00: Intake Air Temperature Sensor 1 Circuit Range/Performance |
| DTC P0112 | 00: Intake Air Temperature Sensor 1 Circuit Low Input |
| DTC P0113 | 00: Intake Air Temperature Sensor 1 Circuit High Input |
| DTC P0114 | 00: Intake Air Temperature Sensor 1 Circuit Intermittent Bank 1 |
| DTC P0116 | 00: Engine Coolant Temperature Circuit Range/Performance |
| DTC P0117 | 00: Engine Coolant Temperature Circuit Low Input |
| DTC P0118 | 00: Engine Coolant Temperature Circuit High Input |
| DTC P0119 | 00: Engine Coolant Temperature Circuit Intermittent |
| DTC P011B | 00: Engine Coolant Temperature/Intake Air Temperature Correlation |
| DTC P0121 | 00: Throttle/Pedal Position Sensor/Switch 'A' Circuit Range/Performance |
| DTC P0122 | 00: Throttle/Pedal Position Sensor/Switch 'A' Circuit Low Input |
| DTC P0123 | 00: Throttle/Pedal Position Sensor/Switch 'A' Circuit High Input |
| DTC P0127 | 00: Intake Air Temperature Too High |
| DTC P0130 | 00: O2 Sensor Circuit (Bank 1 Sensor 1) |
| DTC P0131 | 00: O2 Sensor Circuit Low Voltage (Bank 1/Sensor 1) |
| DTC P0132 | 00: O2 Sensor Circuit High Voltage (Bank 1/Sensor 1) |
| DTC P0133 | 00: O2 Sensor Circuit Slow Response (Bank 1 Sensor 1) |
| DTC P0134 | 00: O2 Sensor Circuit No Activity Detected (Bank 1/Sensor 1) |
| DTC P0135 | 00: O2 Sensor Heater Circuit (Bank 1/Sensor 1) |
| DTC P0136 | 00: O2 Sensor Circuit (Bank 1/Sensor 2) |
| DTC P0137 | 00: O2 Sensor Circuit Low Voltage (Bank 1/Sensor 2) |
| DTC P0138 | 00: O2 Sensor Circuit High Voltage (Bank 1/Sensor 2) |
| DTC P013A | 00: O2 Sensor Slow Response - Rich to Lean Bank 1 Sensor 2 |
| DTC P013B | 00: O2 Sensor Slow Response - Lean to Rich Bank 1 Sensor 2 |
| DTC P013E | 00: O2 Sensor Delayed Response - Rich to Lean Bank 1 Sensor 2 |
| DTC P013F | 00: O2 Sensor Delayed Response - Lean to Rich Bank 1 Sensor 2 |
| DTC P0171 | 00: System Too Lean (Bank 1) |
| DTC P0172 | 00: System Too Rich (Bank 1) |
| DTC P0201 | 00: Injector Circuit/Open-Cylinder 1 |
| DTC P0202 | 00: Injector Circuit/Open-Cylinder 2 |
| DTC P0203 | 00: Injector Circuit/Open-Cylinder 3 |
| DTC P0204 | 00: Injector Circuit/Open-Cylinder 4 |
| DTC P0222 | 00: Throttle/Pedal Position Sensor/Switch 'B' Circuit Low Input |
| DTC P0223 | 00: Throttle/Pedal Position Sensor/Switch 'B' Circuit High Input |
| DTC P0230 | 00: Fuel Pump Primary Circuit |
| DTC P0261 | 00: Cylinder 1 - Injector Circuit Low |
| DTC P0262 | 00: Cylinder 1 Injector Circuit High |
| DTC P0264 | 00: Cylinder 2 - Injector Circuit Low |
| DTC P0265 | 00: Cylinder 2 - Injector Circuit High |
| DTC P0267 | 00: Cylinder 3 - Injector Circuit Low |
| DTC P0268 | 00: Cylinder 3 - Injector Circuit High |
| DTC P0270 | 00: Cylinder 4 - Injector Circuit Low |
| DTC P0271 | 00: Cylinder 4 - Injector Circuit High |
| DTC P0300 | 00: Random/Multiple Cylinder Misfire Detected |
| DTC P0301 | 00: Cylinder 1-Misfire detected |
| DTC P0302 | 00: Cylinder 2-Misfire detected |
| DTC P0303 | 00: Cylinder 3-Misfire detected |
| DTC P0304 | 00: Cylinder 4-Misfire detected |
| DTC P0326 | 00: Knock Sensor 1 Circuit Range/Performance |
| DTC P0335 | 00: Crankshaft Position Sensor A Circuit |
| DTC P0336 | 00: Crankshaft Position Sensor 'A' Circuit Range/Performance |
| DTC P0341 | 00: Camshaft Position Sensor A Circuit Range/Performance (Single Sensor) |
| DTC P0342 | 00: Camshaft Position Sensor 'A' Circuit Low Bank 1 or Single Sensor |
| DTC P0343 | 00: Camshaft Position Sensor 'A' Circuit High Bank 1 or Single Sensor |
| DTC P0366 | 00: Camshaft Position Sensor 'B' Circuit Range/Performance |
| DTC P0367 | 00: Camshaft Position Sensor 'B' Circuit Low Bank 1 |
| DTC P0368 | 00: Camshaft Position Sensor 'B' Circuit High Bank 1 |
| DTC P0401 | 00: Exhaust Gas Recirculation Flow Insufficient Detected |
| DTC P0403 | 00: Exhaust Gas Recirculation Control Circuit |
| DTC P0404 | 00: Exhaust Gas Recirculation Control Circuit Range/Performance |
| DTC P0405 | 00: Exhaust Gas Recirculation Sensor A Circuit Low |
| DTC P0406 | 00: Exhaust Gas Recirculation Sensor A Circuit High |
| DTC P0420 | 00: Catalyst System Efficiency below Threshold (Bank 1) |
| DTC P042E | 00: EGR 'A' Control Stuck Open |
| DTC P042F | 00: EGR 'A' Control Stuck Closed |
| DTC P0442 | 00: Evap. Emission System - Leak detected (small leak) |
| DTC P0444 | 00: Evap. Emission System - Purge Ctrl. Valve Circuit Open |
| DTC P0449 | 00: Evap. Emission System - Vent valve/Solenoid circuit |
| DTC P0451 | 00: Evap. Emission System - Pressure Sensor Range/Performance |
| DTC P0452 | 00: Evap. Emission System - Pressure Sensor Low Input |
| DTC P0453 | 00: Evap. Emission System - Pressure Sensor High Input |
| DTC P0455 | 00: Evap. Emission System - Leak detected (Large leak) |
| DTC P0456 | 00: Evap. Emission System - Leak detected (very small leak) |
| DTC P0458 | 00: EVAP System Purge Control Valve 'A' Circuit Low |
| DTC P0459 | 00: EVAP System Purge Control Valve 'A' Circuit High |
| DTC P0462 | 00: Fuel Level Sensor 'A' Circuit Low Input |
| DTC P0463 | 00: Fuel Level Sensor 'A' Circuit High Input |
| DTC P0489 | 00: EGR 'A' Control Circuit Low |
| DTC P0498 | 00: EVAP System Vent Valve Control Circuit Low |
| DTC P0499 | 00: EVAP System Vent Valve Control Circuit High |
| DTC P049D | 00: EGR 'A' Control Position Exceeded Learning Limit |
| DTC P04DF | 00: EVAP System Purge Control Valve 'A' Performance/Stuck Open |
| DTC P04E0 | 00: EVAP System Purge Control Valve 'A' Stuck Closed |
| DTC P0504 | 00: Brake Switch "A"/"B" Correlation |
| DTC P0506 | 00: Idle Air Control System - RPM lower than expected |
| DTC P0507 | 00: Idle Air Control System - RPM higher than expected |
| DTC P050A | 00: Cold Start Idle Air Control System Performance |
| DTC P050B | 00: Cold Start Ignition Timing Performance |
| DTC P050C | 00: Cold Start Engine Coolant Temperature Performance |
| DTC P0532 | 00: A/C Refrigerant Pressure Sensor "A" Circuit Low Input |
| DTC P0533 | 00: A/C Refrigerant Pressure Sensor "A" Circuit High Input |
| DTC P0562 | 00: System Voltage Low |
| DTC P0563 | 00: System Voltage High |
| DTC P05CC | 00: Cold Start 'A' Camshaft Position Timing Performance Bank 1 |
| DTC P05CE | 00: Cold Start 'B' Camshaft Position Timing Performance Bank 1 |
| DTC P0605 | 00: Internal Control Module Read Only Memory (ROM) Error |
| DTC P0606 | 00: ECM/PCM Processor |
| DTC P061A | 00: Internal Control Module Torque Performance |
| DTC P0620 | 00: Generator Control Circuit |
| DTC P0630 | 00: VIN Not Programmed or Incompatible-ECM/PCM |
| DTC P0638 | 00: Throttle Actuator Control Range/Performance |
| DTC P0642 | 00: Sensor Reference Voltage "A" Circuit Low |
| DTC P0643 | 00: Sensor Reference Voltage "A" Circuit High |
| DTC P064D | 00: Internal Control Module O2 Sensor Processor Performance Bank 1 |
| DTC P0652 | 00: Sensor Reference Voltage 'B' Circuit Low |
| DTC P0653 | 00: Sensor Reference Voltage 'B' Circuit High |
| DTC P0660 | 00: Intake Manifold Tuning Valve Control Circuit/Open Bank 1 |
| DTC P0661 | 00: Intake Manifold Tuning Valve Control Circuit Low Bank 1 |
| DTC P0662 | 00: Intake Manifold Tuning Valve Control Circuit High Bank 1 |
| DTC P0698 | 00: Sensor Reference Voltage 'C' Circuit Low |
| DTC P0699 | 00: Sensor Reference Voltage 'C' Circuit High |
| DTC P0A1A | 00: Generator Control Module |
| DTC P2096 | 00: Post Catalyst Fuel Trim System Too Lean (Bank 1) |
| DTC P2097 | 00: Post Catalyst Fuel Trim System Too Rich (Bank 1) |
| DTC P2101 | 00: Throttle Actuator Control Motor Circuit Range/Performance |
| DTC P2118 | 00: Throttle Actuator Control Motor Current Range/Performance |
| DTC P2122 | 00: Throttle/Pedal Position Sensor/Switch 'D' Circuit Low Input |
| DTC P2123 | 00: Throttle/Pedal Position Sensor/Switch 'D' Circuit High Input |
| DTC P2127 | 00: Throttle/Pedal Position Sensor/Switch 'E' Circuit Low Input |
| DTC P2128 | 00: Throttle/Pedal Position Sensor/Switch 'E' Circuit High Input |
| DTC P2138 | 00: Throttle/Pedal Position Sensor/Switch "D"/"E" Voltage Correlation |
| DTC P2159 | 00: Vehicle Speed Sensor "B" Range/Performance |
| DTC P2183 | 00: Engine Coolant Temperature Sensor 2 Circuit Range/Performance |
| DTC P2184 | 00: Engine Coolant Temperature Sensor 2 Circuit Low |
| DTC P2185 | 00: Engine Coolant Temperature Sensor 2 Circuit High |
| DTC P2186 | 00: Engine Coolant Temperature Sensor 2 Circuit Intermittent/Erratic |
| DTC P2195 | 00: O2 Sensor Signal Stuck Lean (Bank 1 Sensor 1) |
| DTC P2196 | 00: O2 Sensor Signal Stuck Rich (Bank 1 Sensor 1) |
| DTC P219C | 00: Cylinder 1 Contribution/Balance |
| DTC P219D | 00: Cylinder 2 Contribution/Balance |
| DTC P219E | 00: Cylinder 3 Contribution/Balance |
| DTC P219F | 00: Cylinder 4 Contribution/Balance |
| DTC P21CF | 00: Cylinder 1 Contribution/Balance |
| DTC P21D0 | 00: Cylinder 2 Contribution/Balance |
| DTC P21D1 | 00: Cylinder 3 Contribution/Balance |
| DTC P21D2 | 00: Cylinder 4 Contribution/Balance |
| DTC P21DB | 00: Cylinder 1 Injector 'B' Circuit/Open |
| DTC P21DC | 00: Cylinder 2 Injector 'B' Circuit/Open |
| DTC P21DE | 00: Cylinder 3 Injector 'B' Circuit/Open |
| DTC P21E0 | 00: Cylinder 3 Injector 'B' Circuit Low |
| DTC P21E1 | 00: Cylinder 3 Injector 'B' Circuit High |
| DTC P21E2 | 00: Cylinder 4 Injector 'B' Circuit Low |
| DTC P21E3 | 00: Cylinder 4 Injector 'B' Circuit High |
| DTC P2227 | 00: Barometric Pressure Circuit Range/Performance |
| DTC P2228 | 00: Barometric Pressure Circuit Low Input |
| DTC P2229 | 00: Barometric Pressure Circuit High Input |
| DTC P2237 | 00: O2 Sensor Pumping Current Circuit/Open (Bank 1 Sensor 1) |
| DTC P2243 | 00: O2 Sensor Reference Voltage Circuit/Open (Bank 1 Sensor 1) |
| DTC P2251 | 00: O2 Sensor Reference Ground Circuit/Open (Bank 1 Sensor 1) |
| DTC P2270 | 00: O2 Sensor Signal Stuck Lean (Bank 1 Sensor 2) |
| DTC P2271 | 00: O2 Sensor Signal Stuck Rich (Bank 1 Sensor 2) |
| DTC P2280 | 00: Air Flow Restriction/Air Leak Between Air Filter and MAF Bank 1 |
| DTC P2414 | 00: O2 Sensor Exhaust Sample Error (Bank 1 Sensor 1) |
| DTC P2422 | 00: EVAP System Vent Valve Stuck Closed |
| DTC P2501 | 00: Generator Lamp/L-Terminal Circuit High |
| DTC P2502 | 00: Charging System Voltage |
| DTC P2503 | 00: Charging System Voltage Low |
| DTC P2504 | 00: Charging System Voltage High |
| DTC P25B0 | 00: Fuel Level Sensor 'A' Stuck |
| DTC P25DE | 00: 'A' Camshaft Position - Unable to Achieve Locked Position Bank 1 |
| DTC P2610 | 00: ECM/PCM Internal Engine Off Timer Performance |
| DTC P2626 | 00: O2 Sensor Pumping Current Trim Circuit/Open (Bank 1 Sensor 1) |
| DTC P262B | 00: Control Module Power Off Timer Performance |
| DTC P2B58 | 00: Engine Coolant Flow Control Valve Motor Current High |
| DTC P2B59 | 00: Engine Coolant Flow Control Valve Control Circuit/Open |
| DTC P2B5D | 00: Engine Coolant Flow Control Valve Position Sensor Circuit |
| DTC P2B60 | 00: Engine Coolant Flow Control Valve Position Sensor Circuit Range/Performance |
| DTC U0001 | 00: High Speed CAN Communication Bus |
| DTC U0101 | 00: Lost Communication with TCM |
| DTC U012D | 00: Lost Communication With Generator Control Module |
| DTC U012A | 00: Lost Communication With ICSC Module |
| DTC U042B | 00: CAN Communication Failure with Hill Assist Control |
| DTC U04B1 | 00: Invalid Data Received From Battery Monitor Module |
| DTC U060F | 00: Lost Communication With Mass or Volume Air Flow Sensor 'A' |
| DTC U063F | 00: Lost Communication With Engine Coolant Flow Control Valve Position Sensor |
| DTC U1112 | 00: LIN Communication Error |
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.