Engine Mechanical - Troubleshooting
- Symptom Troubleshooting Index
- Description & Operation
- Auto Idle Stop System Description - Operation Conditions (CVT) (2023 2024)
- Auto Idle Stop System Description - Operation Conditions (CVT) (2025)
- Auto Idle Stop System Description - Operation Conditions (M/T) (2023 2024)
- Auto Idle Stop System Description - Operation Conditions (M/T) (2025)
- Auto Idle Stop System Description (CVT) (2023 2024)
- Auto Idle Stop System Description (CVT) (2025)
- Auto Idle Stop System Description (M/T) (2023 2024)
- Auto Idle Stop System Description (M/T) (2025)
- EVAP System Description (1.5L Engine)
- EVAP System Description (2.0L Engine) (2024 2025)
- Electronic Throttle Control System Description (1.5L Engine)
- Electronic Throttle Control System Description (2.0L Engine) (2024 2025)
- PCV System Description
- PGM-FI System Description - Components
- PGM-FI System Description - On-Board Snapshot
- PGM-FI System Description (1.5L Engine)
- PGM-FI System Description (2.0L Engine) (2024 2025)
- Turbocharger Control System Description
- VTEC/VTC System Description (1.5L Engine)
- VTEC/VTC System Description (2.0L Engine) (2024 2025)
- Troubleshooting
- A/C Signal Circuit Troubleshooting (1.5L Engine)
- Auto Idle Stop System Symptom Troubleshooting - Auto idle stop system does not operate (CVT, With Auto Idle Stop System)
- Auto Idle Stop System Symptom Troubleshooting - Auto idle stop system does not operate (M/T, With Auto Idle Stop System)
- Auto Idle Stop System Symptom Troubleshooting - Starter System Counter Inspection (USA/Canada models, With Auto Idle Stop System) (2025)
- Auto Idle Stop System Symptom Troubleshooting - Starter System Counter Inspection (With Auto Idle Stop System) (2023 2024)
- MIL Circuit Troubleshooting (1.5L Engine)
- MIL Circuit Troubleshooting (2.0L Engine) (2024 2025)
- PCM Power and Ground Circuit Troubleshooting (1.5L Engine)
- Notes
- Inspection Outline
- Related Information
- HDS Function
- +B_BACKUP_FI-ECU, FI_ECU_GND Circuit Inspection
- +B_IGP Circuit Inspection
- FI_MAIN_RLY_OUT, FI_MAIN_RLY_CL- Open Wire Inspection
- IG1, INJ_GND1, INJ_GND2, GND2, GND3, GND4 Circuit Inspection
- IG1_FUEL_PUMP, FUEL_PUMP_RLY_OUT Circuit Inspection
- FI_MAIN_RLY_OUT Shorted Wire Inspection
- Components Connected to FI_MAIN_RLY_OUT Circuit Inspection
- Fuel Pump Inspection
- PCM Inspection
- PCM Power and Ground Circuit Troubleshooting (2.0L Engine) (2024 2025)
- Notes
- Inspection Outline
- Related Information
- HDS Function
- +B_BACKUP_FI-ECU, IG1_MON, GND Circuit Inspection
- +B_IGP Circuit Inspection
- FI_MAIN_RLY_OUT, FI_MAIN_RLY_CL- Circuit Inspection
- FUEL_PUMP_RLY_OUT Circuit Inspection
- Components Connected to FI_MAIN_RLY_OUT Circuit Inspection
- Fuel Pump Inspection
- PCM Inspection
- Connector View
- Component Location Index
- Symptom Troubleshooting Index for Viewer
- After warming up, idle speed is above specifications without load (MIL works OK, no DTCs set) (1.5L Engine, USA/Canada models)
- After warming up, idle speed is above specifications without load (MIL works OK, no DTCs set) (2.0L Engine, USA/Canada models) (2024 2025)
- After warming up, idle speed is above specifications without load (MIL works OK, no DTCs set) (USA/Canada models) (2023)
- After warming up, idle speed is below specifications without load (MIL works OK, no DTCs set) (1.5L Engine, USA/Canada models)
- After warming up, idle speed is below specifications without load (MIL works OK, no DTCs set) (2.0L Engine, USA/Canada models) (2024 2025)
- After warming up, idle speed is below specifications without load (MIL works OK, no DTCs set) (USA/Canada models) (2023)
- Auto idle stop system does not operate (2023)
- Auto idle stop system does not operate (With Auto Idle Stop System)
- Auto idle stop system indicator does not come on (With Auto Idle Stop System)
- Auto idle stop system indicator does not come on:Auto idle stop indicator (green) Auto idle stop system indicator (amber) Auto idle stop OFF indicator (white) Auto idle stop suspend indicator (white) (2023)
- Cold fast idle too high (MIL works OK, no DTCs set) (1.5L Engine, USA/Canada models)
- Cold fast idle too high (MIL works OK, no DTCs set) (2.0L Engine, USA/Canada models) (2024 2025)
- Cold fast idle too high (MIL works OK, no DTCs set) (USA/Canada models) (2023)
- Cold fast idle too low (MIL works OK, no DTCs set) (1.5L Engine, USA/Canada models)
- Cold fast idle too low (MIL works OK, no DTCs set) (2.0L Engine, USA/Canada models) (2024 2025)
- Cold fast idle too low (MIL works OK, no DTCs set) (USA/Canada models) (2023)
- Difficult to refuel (MIL works OK, NO DTCs set) (1.5L Engine, USA/Canada models)
- Difficult to refuel (MIL works OK, NO DTCs set) (2.0L Engine, USA/Canada models) (2024 2025)
- Difficult to refuel (MIL works OK, NO DTCs set) (USA/Canada models) (2023)
- Engine abnormal noise while fuel cut-off control (2023)
- Engine is hard to start (MIL works OK, no DTCs set) (1.5L Engine, USA/Canada models)
- Engine is hard to start (MIL works OK, no DTCs set) (2.0L Engine, USA/Canada models) (2024 2025)
- Engine is hard to start (MIL works OK, no DTCs set) (USA/Canada models) (2023)
- Engine low power
- Engine stalls (MIL works OK, no DTCs set) (1.5L Engine, USA/Canada models)
- Engine stalls (MIL works OK, no DTCs set) (2.0L Engine, USA/Canada models) (2024 2025)
- Engine stalls (MIL works OK, no DTCs set) (USA/Canada models) (2023)
- Engine starts but stalls immediately (MIL works OK, no DTCs set, security indicator stays on or flashes) (1.5L Engine, USA/Canada models)
- Engine starts but stalls immediately (MIL works OK, no DTCs set, security indicator stays on or flashes) (2.0L Engine, USA/Canada models) (2024 2025)
- Engine starts but stalls immediately (MIL works OK, no DTCs set, security indicator stays on or flashes) (USA/Canada models) (2023)
- Engine will not start (MIL works OK, no DTCs set) (1.5L Engine, USA/Canada models)
- Engine will not start (MIL works OK, no DTCs set) (2.0L Engine, USA/Canada models) (2024 2025)
- Engine will not start (MIL works OK, no DTCs set) (USA/Canada models) (2023)
- Engine will not start (MIL works OK, no DTCs set, security indicator stays on or flashes) (1.5L Engine, USA/Canada models)
- Engine will not start (MIL works OK, no DTCs set, security indicator stays on or flashes) (2.0L Engine, USA/Canada models) (2024 2025)
- Engine will not start (MIL works OK, no DTCs set, security indicator stays on or flashes) (USA/Canada models) (2023)
- Engine will not start and HDS does not communicate with the PCM (MIL comes on and stays on, no DTCs set) (1.5L Engine, USA/Canada models)
- Engine will not start and HDS does not communicate with the PCM (MIL comes on and stays on, no DTCs set) (2.0L Engine, USA/Canada models) (2024 2025)
- Engine will not start and HDS does not communicate with the PCM (MIL comes on and stays on, no DTCs set) (USA/Canada models) (2023)
- HDS does not communicate with the PCM or the vehicle (1.5L Engine, USA/Canada models)
- HDS does not communicate with the PCM or the vehicle (2.0L Engine, USA/Canada models) (2024 2025)
- HDS does not communicate with the PCM or the vehicle (USA/Canada models) (2023)
- Idle speed fluctuates (MIL works OK, no DTCs set) (1.5L Engine, USA/Canada models)
- Idle speed fluctuates (MIL works OK, no DTCs set) (2.0L Engine, USA/Canada models) (2024 2025)
- Idle speed fluctuates (MIL works OK, no DTCs set) (USA/Canada models) (2023)
- Idle stop time is short (2023)
- Idle stop time is short (With Auto Idle Stop System)
- Low power (MIL works OK, no DTCs set) (1.5L Engine, USA/Canada models)
- Low power (MIL works OK, no DTCs set) (2.0L Engine, USA/Canada models) (2024 2025)
- Low power (MIL works OK, no DTCs set) (USA/Canada models) (2023)
- MIL comes on and stays on, or never comes on at all, no DTCs set (1.5L Engine, USA/Canada models)
- MIL comes on and stays on, or never comes on at all, no DTCs set (2.0L Engine, USA/Canada models) (2024 2025)
- MIL comes on and stays on, or never comes on at all, no DTCs set (USA/Canada models) (2023)
- Starter system warning message displays on (no DTCs set) (2023)
- Starter system warning message displays on (no DTCs set) (With Auto Idle Stop System)
- General Information
- (Guidance) - Powertrain
- How to read
- Tighten bolts and nuts according to the service manual. (Torque control method, Rotation angle method)
- Tightening Bolts/Nuts According to the Hole Shape
- Tightening Order of Bolts or Nuts with Different Sizes
- Tightening Hose Bands and Clamps
- Preventing Parts from Falling
- When Moving Parts with Hoses and Pipes
- Keeping the Connectors Free of Liquids and Debris Before Disconnecting Them
- Mounting Parts that are Spring Loaded
- Engine Configuration (1.5L Engine)
- Engine Configuration (2.0L Engine) (2024 2025)
- How to Connect the HDS
- How to Set Readiness Codes
- Malfunction Indicator Lamp (MIL) Indication (In relation to Readiness Codes)
- Catalytic Converter Monitor and Readiness Code
- Evaporative Emission (EVAP) Control System Monitor and Readiness Code
- Air Fuel Ratio (A/F) Sensor Monitor and Readiness Code
- Air Fuel Ratio (A/F) Sensor Heater Monitor Readiness Code
- Misfire Monitor and Readiness Code
- Fuel System Monitor and Readiness Code
- Comprehensive Component Monitor and Readiness Code
- EGR Monitor and Readiness Code
- (Guidance) - Powertrain