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 Ioniq Plug-In Hybrid SEFACTORY OEM SERVICE PROCEDURE
External Pages
These are pages that do not belong to the exact selected vehicle (2021 Hyundai Ioniq Plug-In Hybrid Limited), but are still accessible from a link in your vehicle's manual. Be very cautious using repair info from here because these pages may not apply to your vehicle.
- Different car
- Section 1 (Airbag System Diagnosis (PHEV) (2 Of 2))
- Section 2 (Floor Console (PHEV))
- Section 3 (Engine Control System (PHEV))
- Section 4 (Front Seat Assembly (PHEV))
- Section 5 (Rear Seat Assembly (PHEV))
- Section 6 (Interior Trim (PHEV))
- Section 7 (Engine Control/Fuel System - General Information (PHEV))
- Section 8 (Keyless Entry And Burglar Alarm (PHEV))
- Section 9 (Smart Key System (PHEV))
- Section 10 (General Information (PHEV))
- Section 11 (Intake And Exhaust System (PHEV))
- Section 12 (Engine Cooling System (PHEV))
- Section 13 (Engine And Transaxle Assembly (R & I) (PHEV))
- Section 14 (Fuel Delivery System (PHEV))
- Section 15 (Cylinder Head Assembly (PHEV))
- Section 16 (Seat Electrical (PHEV))
- Section 17 (Lubrication System (PHEV))
- Section 18 (Timing System (PHEV))
- Section 19 (Engine Mechanical System - General Information (PHEV))
- Section 20 (Hybrid Motor Cooling System (PHEV))
- Section 21 (Hybrid Control System (PHEV))
- Section 22 (Double Clutch Transmission (DCT) System (PHEV))
- Section 23 (Front Suspension System (PHEV))
- Section 24 (Air Conditioning System (PHEV))
- Section 25 (Drive Belt System (PHEV))
- Section 26 (Tires/Wheels/Alignment (PHEV))
- Section 27 (Body Side Molding (PHEV))
- Section 28 (Tailgate Assembly (PHEV))
- Section 29 (Double Clutch Transmission Diagnosis (PHEV) (2 Of 2))
- Section 30 (Double Clutch Transmission Control System (PHEV))
- Section 31 (Integrated Gateway Power Module Diagnosis (PHEV))
- Section 32 (Integrated Body Control Unit Diagnosis (PHEV))
- Section 33 (Crash Pad (PHEV))
- Section 34 (Audio/AVN System (PHEV))
- Section 35 (Steering Wheel (PHEV))
- Section 36 (Indicators And Gauges (PHEV))
- Section 37 (MULTIFUNCTION Switch (PHEV))
- Section 38 (Cowl Top Cover (PHEV))
- Section 39 (Motor Driven Power Steering System (PHEV))
- Section 40 (Front Door Assembly (PHEV))
- Section 41 (Rear Door Assembly (PHEV))
- Section 42 (Roof Trim (PHEV))
- Section 43 (Lighting System (PHEV))
- Section 44 (Ignition System (PHEV))
- Section 45 (DTC Index (PHEV))
- Section 46 (Driver Door Module Diagnosis (PHEV))
- Section 47 (Button Engine Start System (PHEV))
- Section 48 (Double Clutch Transmission (DCT) System - General Information (PHEV))
- Section 49 (Hybrid Control System - General Information (PHEV))
- Section 50 (Active Hydraulic Boost (AHB) System (PHEV))
- Section 51 (Blind Spot Collision Warning Diagnosis - Right (PHEV))
- Section 52 (Rear Corner Radar System (PHEV))
- Section 53 (Rear Bumper (PHEV))
- Section 54 (Front Bumper And Radiator Grille (PHEV))
- Section 55 (Mirrors (PHEV))
- Section 56 (Airbag Modules And Clock Spring (PHEV))
- Section 57 (Body Control Module (BCM) (PHEV))
- Section 58 (Engine Control System Diagnosis (PHEV) (6 Of 6))
- Section 59 (Airbag System Diagnosis (PHEV) (1 Of 2))
- Section 60 (Power Windows (PHEV))
- Section 61 (Heater System (PHEV))
- Section 62 (Horn (PHEV))
- Section 63 (Front Radar System (PHEV))
- Section 64 (Virtual Engine Sound System (VESS) (PHEV))
- Section 65 (High Voltage Battery Cooling System (PHEV))
- Section 66 (Fuses And Relays (PHEV))
- Section 67 (Hybrid Motor System - General Information (PHEV))
- Section 68 (Hybrid Motor Assembly (PHEV))
- Section 69 (Clutch System (PHEV))
- Section 70 (Occupant Classification System Diagnosis (PHEV))
- Section 71 (Assist Door Module Diagnosis (PHEV))
- Section 72 (Driveshaft Assembly (PHEV))
- Section 73 (Brake System - General Information (PHEV))
- Section 74 (Air Conditioning System Diagnosis (PHEV))
- Section 75 (ESC/AHB Diagnosis (PHEV) (2 Of 2))
- Section 76 (Smart Key Code Saving Diagnosis (PHEV))
- Section 77 (Hood Assembly (PHEV))
- Section 78 (Amplifier Diagnosis (PHEV))
- Section 79 (Battery Management System Diagnosis (PHEV) (3 Of 3))
- Section 80 (Engine Control System Diagnosis (PHEV) (4 Of 6))
- Section 81 (Low Voltage Dc/Dc Converter (LDC) (PHEV))
- Section 82 (Supplemental Restraint System Control Module (SRSCM) And Sensors (PHEV))
- Section 83 (Tire Pressure Monitoring System Diagnosis (PHEV))
- Section 84 (Tire Pressure Monitoring System (PHEV))
- Section 85 (Cluster Module Diagnosis (PHEV))
- Section 86 (Virtual Engine Sound System Diagnosis (PHEV))
- Section 87 (Engine Control System Diagnosis (PHEV) (2 Of 6))
- Section 88 (Multi Function Camera Diagnosis (PHEV))
- Section 89 (Active Air Flap Diagnosis (PHEV))
- Section 90 (Mood Lamp Module Diagnosis (PHEV))
- Section 91 (Blind Spot Collision Warning Diagnosis - Left (PHEV))
- Section 92 (Engine Electrical System - General Information (PHEV))
- Section 93 (High Voltage Battery System (PHEV))
- Section 94 (High Voltage Battery Control System (PHEV))
- Section 95 (Smart Key Unit Diagnosis (PHEV))
- Section 96 (Wireless Power Charger Diagnosis (PHEV))
- Section 97 (Power Seat Module Diagnosis (PHEV))
- Section 98 (Immobilizer System Diagnosis (PHEV))
- Section 99 (Audio/Video/Navigation Diagnosis (PHEV))
- Section 100 (Parking Guide System Diagnosis (PHEV))
- Section 101 (On Board Charger System Diagnosis (PHEV) (2 Of 2))
- Section 102 (Parking Brake Diagnosis (PHEV))
- Section 103 (Motor Driven Power Steering System Diagnosis (PHEV))
- Section 104 (HCU/LDC Diagnosis (PHEV) (2 Of 2))
- Section 105 (SCC/AEB System Diagnosis (PHEV))
- Section 106 (PHEV Motor Control System Diagnosis (PHEV) (2 Of 2))
- Section 107 (Double Clutch Transmission Diagnosis (PHEV) (1 Of 2))
- Section 108 (PHEV Motor Control System Diagnosis (PHEV) (1 Of 2))
- Section 109 (Battery Management System Diagnosis (PHEV) (2 Of 3))
- Section 110 (HCU/LDC Diagnosis (PHEV) (1 Of 2))
- Section 111 (On Board Charger System Diagnosis (PHEV) (1 Of 2))
- Section 112 (Engine Control System Diagnosis (PHEV) (1 Of 6))
- Section 113 (Engine Control System Diagnosis (PHEV) (3 Of 6))
- Section 114 (Engine Control System Diagnosis (PHEV) (5 Of 6))
- Section 115 (Battery Management System Diagnosis (PHEV) (1 Of 3))
- Section 116 (ESC/AHB Diagnosis (PHEV) (1 Of 2))
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.