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.
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HOMESERVICE MANUALSHONDA2020CIVIC SI, 4D SEDANREPAIR AND DIAGNOSISENGINE PERFORMANCEFUEL DELIVERYENGINE CONTROL / ENGINE MECHANICAL - SERVICE INFORMATION
2020 Honda Civic Si, 4D Sedan
Engine Control / Engine Mechanical - Service Information
2020 Honda Civic Si, 4D SedanSECTION Engine Control / Engine Mechanical - Service Information
- Removal and Installation
- A/F Sensor Removal and Installation (K20C1) (2017 2018 2019 2020 2021)
- A/F Sensor Removal and Installation (K20C2)
- A/F Sensor Removal and Installation (L15B7/L15BA/L15BY)
- Accelerator Pedal Module Removal and Installation
- Air Cleaner Removal and Installation (1.5L Engine)
- Air Cleaner Removal and Installation (K20C1) (2017 2018 2019 2020 2021)
- Air Cleaner Removal and Installation (K20C2)
- CKP Sensor Removal and Installation (K20C1) (2017 2018 2019 2020 2021)
- CKP Sensor Removal and Installation (K20C2)
- CKP Sensor Removal and Installation (L15B7/L15BA)
- CMP Sensor Removal and Installation (K20C1) (2017 2018 2019 2020 2021)
- CMP Sensor Removal and Installation (K20C2)
- CMP Sensor Removal and Installation (L15B7/L15BA/L15BY)
- Cam Chain Auto-Tensioner Removal and Installation (K20C1) (2017 2018 2019 2020 2021)
- Cam Chain Auto-Tensioner Removal and Installation (K20C2)
- Cam Chain Auto-Tensioner Removal and Installation (L15B7)
- Cam Chain Removal and Installation (1.5L Engine)
- Cam Chain Removal and Installation (K20C1) (2017 2018 2019 2020 2021)
- Cam Chain Removal and Installation (K20C2)
- Catalytic Converter Removal and Installation (K20C1) (2017 2018 2019 2020 2021)
- Catalytic Converter Removal and Installation (K20C2)
- Catalytic Converter Removal and Installation (L15B7/L15BA/L15BY)
- Charge Air Cooler Removal and Installation (K20C1) (2017 2018 2019 2020 2021)
- Charge Air Cooler Removal and Installation (L15B7)
- Crankshaft Pulley Removal and Installation (1.5L Engine)
- Crankshaft Pulley Removal and Installation (K20C1) (2017 2018 2019 2020 2021)
- Crankshaft Pulley Removal and Installation (K20C2)
- Drive Plate Removal and Installation (K20C2, CVT model)
- ECT Sensor 1 Removal and Installation (K20C1) (2017 2018 2019 2020 2021)
- ECT Sensor 1 Removal and Installation (K20C2)
- ECT Sensor 1 Removal and Installation (L15B7/L15BA/L15BY)
- ECT Sensor 2 Removal and Installation
- ECT Sensor 2 Removal and Installation (K20C1) (2017 2018 2019 2020 2021)
- EVAP Canister Purge Nozzle Removal and Installation (K20C1) (2017 2018 2019 2020 2021)
- EVAP Canister Purge Nozzle Removal and Installation (L15B7/L15BA/L15BY)
- EVAP Canister Purge Valve Removal and Installation (K20C1) (2017 2018 2019 2020 2021)
- EVAP Canister Purge Valve Removal and Installation (K20C2)
- EVAP Canister Removal and Installation
- EVAP Canister Removal and Installation (USA/Canada models)
- EVAP Canister Vent Shut Valve Removal and Installation (USA/Canada models)
- Engine Assembly Torque Rod Removal and Installation (1.5L Engine)
- Engine Assembly Torque Rod Removal and Installation (K20C1) (2017 2018 2019 2020 2021)
- Engine Assembly Torque Rod Removal and Installation (K20C2)
- Engine Block Drain Bolt/Sealing Bolt Removal and Installation (1.5L Engine)
- Engine Block Drain Bolt/Sealing Bolt Removal and Installation (K20C2/K20C1)
- Engine Oil Jet Removal and Installation (1.5L Engine)
- Engine Oil Jet Removal and Installation (K20C2/K20C1)
- Engine Oil Pan Removal and Installation (1.5L Engine)
- Engine Oil Pump Removal and Installation (1.5L Engine)
- Engine Oil Pump Removal and Installation (K20C2)
- Engine Removal and Installation (1.5L Engine)
- Engine Removal and Installation (K20C1) (2017 2018 2019 2020 2021)
- Engine Removal and Installation (K20C2)
- FTP Sensor Removal and Installation (EX, EX-T, EX-L)
- IAT Sensor 2 Removal and Installation (L15B7/L15BA/L15BY)
- Injector Removal and Installation (K20C1) (2017 2018 2019 2020 2021)
- Injector Removal and Installation (K20C2)
- Injector Removal and Installation (L15B7/L15BA/L15BY)
- Input Shaft (Mainshaft) Speed Sensor Removal and Installation (K20C1) (2017 2018 2019 2020 2021)
- Intake Air Resonator Removal and Installation (1.5L Engine)
- Intake Air Resonator Removal and Installation (K20C2)
- Intake Manifold Removal and Installation (1.5L Engine)
- Intake Manifold Removal and Installation (K20C1) (2017 2018 2019 2020 2021)
- Intake Manifold Removal and Installation (K20C2)
- Knock Sensor Removal and Installation (K20C1) (2017 2018 2019 2020 2021)
- Knock Sensor Removal and Installation (K20C2)
- Knock Sensor Removal and Installation (L15B7/L15BA/L15BY)
- MAF Sensor/IAT Sensor 1 Removal and Installation (L15B7/L15BA/L15BY)
- MAF Sensor/IAT Sensor Removal and Installation (K20C1) (2017 2018 2019 2020 2021)
- MAF Sensor/IAT Sensor Removal and Installation (K20C2)
- MAP Sensor Removal and Installation (K20C2)
- MAP Sensor Removal and Installation (L15B7/L15BA/L15BY)
- MAP Sensor/IAT Sensor Removal and Installation (K20C1) (2017 2018 2019 2020 2021)
- Output Shaft (Countershaft) Speed Sensor Removal and Installation (K20C1) (2017 2018 2019 2020 2021)
- PCM Removal and Installation
- PCM Removal and Installation (K20C1) (2017 2018 2019 2020 2021)
- PCV Valve Removal and Installation (K20C1) (2017 2018 2019 2020 2021)
- PCV Valve Removal and Installation (K20C2)
- PCV Valve Removal and Installation (L15B7/L15BA/L15BY)
- Piston, Ring, Pin, and Connecting Rod Removal and Installation (1.5L Engine)
- Piston, Ring, Pin, and Connecting Rod Removal and Installation (K20C1) (2017 2018 2019 2020 2021)
- Piston, Ring, Pin, and Connecting Rod Removal and Installation (K20C2)
- Rocker Arm Assembly Removal and Installation (1.5L Engine)
- Rocker Arm Assembly Removal and Installation (K20C1) (2017 2018 2019 2020 2021)
- Rocker Arm Assembly Removal and Installation (K20C2)
- Rocker Arm Oil Control Valve Removal and Installation (K20C1) (2017 2018 2019 2020 2021)
- Rocker Arm Oil Control Valve Removal and Installation (K20C2)
- Rocker Arm Oil Pressure Sensor Removal and Installation (K20C1) (2017 2018 2019 2020 2021)
- Rocker Arm Oil Pressure Switch Removal and Installation (K20C1) (2017 2018 2019 2020 2021)
- Rocker Arm Oil Pressure Switch Removal and Installation (K20C2)
- Secondary HO2S Removal and Installation (K20C1) (2017 2018 2019 2020 2021)
- Secondary HO2S Removal and Installation (K20C2)
- Secondary HO2S Removal and Installation (L15B7/L15BA/L15BY)
- Throttle Body Removal and Installation (K20C1) (2017 2018 2019 2020 2021)
- Throttle Body Removal and Installation (K20C2)
- Throttle Body Removal and Installation (L15B7/L15BA/L15BY)
- Turbocharger Bypass Control Solenoid Valve Removal and Installation (K20C1) (2017 2018 2019 2020 2021)
- Turbocharger Bypass Control Solenoid Valve Removal and Installation (L15B7/L15BA)
- VTC Strainer Removal and Installation (K20C1) (2017 2018 2019 2020 2021)
- Valve, Spring, and Valve Seal Removal and Installation (K20C1) (2017 2018 2019 2020 2021)
- Valve, Spring, and Valve Seal Removal and Installation (K20C2)
- Valve, Spring, and Valve Seal Removal and Installation (L15B7)
- Water Passage Removal and Installation (1.5L Engine)
- Removal, Installation & Test
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- β’ You smell fuel, burning insulation, or see smoke.
- β’ Brakes feel soft, pull hard to one side, or make grinding noises.
- β’ The engine overheats, stalls repeatedly, or misfires under load.
- β’ You are missing required tools, torque specs, or safe lifting equipment.
- β’ You are not confident in the next step or safety outcome.