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.
2020 Honda Fit EX-LFACTORY OEM SERVICE PROCEDURE
Engine Control System & Engine Mechanical - Testing & Troubleshooting
- Component Location Index
- Catalytic Converter System Component Location Index
- EGR System Component Location Index
- EVAP Control System Component Location Index
- Electronic Throttle Control System Component Location Index
- Engine Block Assembly Component Location Index
- PCV System Component Location Index
- PGM-FI System Component Location Index
- VTEC / VTC System Component Location Index
- Connector For Inputs And Outputs
- Overhaul
- Check
- General Information
- Troubleshooting
- How To Information
- How to Troubleshoot the Fuel and Emissions System
- Intermittent Failures
- Service Information
- Opens and Shorts
- Starter System Indication
- How to Use the HDS (Honda Diagnostic System)
- If the MIL did not stay on
- If you cannot duplicate the DTC
- HDS Clear Command
- Scan Tool Clear Command
- DTC Clear
- How to End a Troubleshooting Session (required after any troubleshooting)
- How to Troubleshoot Circuits at the PCM Connectors
- OBD Status
- How to Set Readiness Codes (KA / KC models)
- 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
- How to Troubleshoot the Fuel and Emissions System
- Symptom Troubleshooting
- After warming up, idle speed is above specifications without load (MIL works OK, no DTCs set) (KA / KC models)
- After warming up, idle speed is below specifications without load (MIL works OK, no DTCs set) (KA / KC models)
- Cold fast idle too high (MIL works OK, no DTCs set) (KA / KC models)
- Cold fast idle too low (MIL works OK, no DTCs set) (KA / KC models)
- Difficult to refuel (MIL works OK, NO DTCs set) (KA / KC models)
- Engine is hard to start (MIL works OK, no DTCs set) (KA / KC models)
- Engine starts but stalls immediately (MIL works OK, no DTCs set, immobilizer indicator stays on or flashes) (KA / KC models)
- Engine will not start (MIL works OK, no DTCs set) (KA / KC models)
- Engine will not start (MIL works OK, no DTCs set, immobilizer indicator stays on or flashes) (KA / KC models)
- Engine will not start and HDS does not communicate with the PCM (MIL comes on and stays on, no DTCs set) (KA / KC models)
- HDS does not communicate with the PCM or the vehicle (KA / KC models)
- Idle speed fluctuates (MIL works OK, no DTCs set) (KA / KC models)
- Low power (MIL works OK, no DTCs set) (KA / KC models)
- MIL comes on and stays on, or never comes on at all, no DTCs set (KA / KC models)
- Testing
- Description
- Catalytic Converter System Description - Overview
- EGR System Description - Overview
- EVAP System Description (KA / KC models)
- Electronic Throttle Control System Description
- PCV System Description - Overview
- PGM-FI System Description - Components (KA / KC models)
- PGM-FI System Description - Electronic Control
- PGM-FI System Description - Ignition Timing Control
- PGM-FI System Description - Injection Control
- PGM-FI System Description - OBD
- PGM-FI System Description - On-Board Snapshot
- VTEC / VTC System Description - VTC
- VTEC / VTC System Description - VTEC
- Inspection & Adjustment
- APP Sensor Signal Inspection
- Block and Piston Inspection
- Breather Line and Suction Line Inspection (KA / KC models)
- Cam Chain Inspection
- Camshaft Inspection
- Camshaft Timing Inspection
- Catalytic Converter Inspection
- Connecting Rod and Crankshaft End Play Inspection
- Cylinder Bore Honing
- Engine Compression Inspection
- Engine Oil Jet Inspection
- Idle Speed Inspection
- PCV Valve Inspection
- VTC Actuator Inspection
- Valve Clearance Adjustment
- Valve Inspection
- Valve Seat Reconditioning
- Valve Stem-to-Guide Clearance Inspection
Factory Service Tools
Use the Manual With the Right Hardware
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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.
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