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 Veloster N Standard TransFACTORY OEM SERVICE PROCEDURE
Engine Control System Diagnosis (2 Of 3)
- 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 P0299-00: Turbocharger-Supercharger Underboost
- 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 P0315-00: Camshaft Position (CMP) Sensor Error
- DTC P0326-00: Knock Sensor 1 Circuit Range/Performance (Bank 1 Or Single Sensor)
- DTC P0335-00: Crankshaft Position Sensor 'A' Circuit
- DTC P0336-00: Crankshaft Position Sensor 'A' Circuit Range/Performance
- DTC P0340-00: Camshaft Position Sensor 'A' Circuit (Single Sensor)
- DTC P0341-00: Camshaft Position Sensor A Circuit Range/Performance (Bank 1)
- DTC P0365-00: Camshaft Position Sensor B Circuit Malfunction (Bank 1)
- DTC P0366-00: Camshaft Position Sensor 'B' Circuit Range/Performance (Bank 1)
- DTC P039B-00: Cylinder 1 Pressure Too High
- DTC P03A5-00: Cylinder 2 Pressure Too High
- DTC P03AF-00: Cylinder 3 Pressure Too High
- DTC P03B9-00: Cylinder 4 Pressure Too High
- DTC P0420-00: Catalyst System Efficiency Below Threshold (Bank 1)
- DTC P0441-00: Evaporative Emission System Incorrect Purge Flow
- DTC P0442-00: Evaporative Emission System-Leak Detected (Small Leak)
- DTC P0444-00: Evaporative Emission System-Purge Control Valve Circuit Open
- DTC P0445-00: Evaporative Emission System-Purge Control Valve Circuit Shorted
- DTC P0447-00: Evaporative Emission System - Vent Control Circuit Open
- DTC P0448-00: Evaporative Emission System - Vent Control Circuit Shorted
- DTC P0451-00: Evaporative Emission System-Pressure Sensor Range/Performance
- DTC P0452-00: Evaporative Emission System-Pressure Sensor Low Input
- DTC P0453-00: Evaporative Emission System-Pressure Sensor High Input
- DTC P0454-00: Evaporative Emission System-Pressure Sensor/Switch Intermittent
- DTC P0455-00: Evaporative Emission System-Leak Detected (Large Leak)
- DTC P0456-00: Evaporative Emission System-Leak Detected (Very Small Leak)
- DTC P0461-00: Fuel Level Sensor 'A' Circuit Range/Performance
- DTC P0462-00: Fuel Level Sensor 'A' Circuit Low Input
- DTC P0463-00: Fuel Level Sensor 'A' Circuit High Input
- DTC P0464-00: Fuel Level Sensor 'A' Circuit Intermittent
- 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 P0532-00: A/C Refrigerant Pressure Sensor 'A' Circuit Low Input
- DTC P0533-00: A/C Refrigerant Pressure Sensor 'A' Circuit High Input
- DTC P053F-00: Cold Start Fuel Pressure Performance Bank 1
- DTC P0560-00: System Voltage
- DTC P0562-00: System Voltage Low
- DTC P0563-00: System Voltage High
- DTC P0564-00: Cruise Control Multi-Function Input A Circuit
- DTC P0605-00: Internal Control Module Read Only Memory (ROM) Error
- DTC P0606-00: ECM/PCM Processor
- DTC P0607-00: Control Module Performance
- DTC P0616-00: Starter Relay Circuit Low
- DTC P0617-00: Starter Relay Circuit High
- DTC P061A-00: Internal Control Module Torque Performance
- DTC P061B-00: Internal Control Module Torque Calculation Performance
- DTC P061C-00: Internal Control Module Engine RPM Performance
- DTC P0620-00: Alternator Control Circuit
- DTC P0625-00: Generator Field/F Terminal Circuit Low
- DTC P0626-00: Generator Field/F Terminal Circuit High
- DTC P062B-00: Internal Control Module Fuel Injector Control Performance
- DTC P0630-00: VIN Not Programmed Or Incompatible-ECM/PCM
- DTC P0638-00: Throttle Actuator Control Range/Performance (Bank 1)
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.