2020 Honda Civic Service and Repair Manual

This 2020 Honda Civic Service and Repair Manual Covers

Engine & Drivetrain

Petrol Engines

• 2.0L DOHC i-VTEC Inline-4 (K20C2)
• 1.5L Turbocharged DOHC VTEC Inline-4 (L15B7)
• 1.5L Turbocharged DOHC VTEC Inline-4 (L15BA) – Hatchback
• 1.5L Turbocharged DOHC VTEC Inline-4 (L15B7 High Output) – Civic Si
• 2.0L Turbocharged DOHC VTEC Inline-4 (K20C1) – Civic Type R

Coverage Includes

• Engine mechanical overhaul procedures
• Turbocharger diagnostics and repair procedures
• Fuel injection system diagnostics
• Variable valve timing system diagnostics
• Ignition system testing and repair
• Cooling system troubleshooting
• Emissions control system repairs
• Intake and exhaust system servicing
• Front-wheel-drive system diagnostics
• Driveshaft and axle servicing
• CVT diagnostics and service procedures
• 6-speed manual transmission diagnostics and overhaul procedures
• Engine Control Module (ECM) diagnostics

Chassis & Suspension

• MacPherson strut front suspension repairs
• Multi-link rear suspension servicing
• Adaptive Damper System diagnostics (Type R, where equipped)
• Steering system diagnostics and repair
• Electric Power Steering (EPS) diagnostics
• Wheel alignment specifications
• Wheel bearing replacement procedures
• Suspension component testing and troubleshooting
• Tire Pressure Monitoring System (TPMS) diagnostics

Braking Systems

• Anti-lock Braking System (ABS) diagnostics
• Electronic Brake Distribution (EBD) diagnostics
• Vehicle Stability Assist (VSA) troubleshooting
• Brake hydraulic system service procedures
• Electronic parking brake diagnostics and repair
• Brake booster and master cylinder testing
• Brake component inspection and replacement procedures

Electrical & Wiring

• Complete Honda factory wiring diagrams
• Battery and charging system diagnostics
• Starting system troubleshooting
• Body Control Module diagnostics
• Power distribution schematics
• Fuse and relay identification
• Exterior and interior lighting diagnostics
• CAN Bus and network communication diagnostics
• Digital instrument cluster diagnostics
• Honda Display Audio infotainment troubleshooting
• Apple CarPlay® and Android Auto™ connectivity diagnostics

Driver Assistance & Safety Systems

• Honda Sensing® diagnostics
• Collision Mitigation Braking System™ (CMBS™) calibration procedures
• Adaptive Cruise Control (ACC) diagnostics
• Lane Keeping Assist System (LKAS) troubleshooting
• Road Departure Mitigation System diagnostics
• Traffic Sign Recognition diagnostics
• LaneWatch™ system diagnostics where equipped
• Multi-angle rearview camera troubleshooting
• Occupant detection system diagnostics

Air Conditioning & HVAC

• Automatic climate control diagnostics
• HVAC control module testing
• Refrigerant servicing specifications
• Heating and ventilation troubleshooting
• Blower motor repairs
• Air distribution actuator diagnostics

Body & Interior

• Interior trim removal and installation procedures
• Sport seat servicing procedures
• Door lock and power window diagnostics
• Exterior body repair procedures
• Sunroof diagnostics and repair procedures where equipped
• Airbag and occupant restraint system servicing
• Smart entry and push-button start system diagnostics
• Trunk and hatch release system diagnostics

Diagnostics & Troubleshooting

• Honda-specific diagnostic procedures
• Diagnostic Trouble Code (DTC) lookup
• Turbocharger troubleshooting workflows
• Module programming and configuration procedures
• Component testing specifications
• Scan tool diagnostics
• Service functions and adaptations
• Electrical fault tracing procedures

Common Error Codes Covered

This manual provides diagnostic and repair procedures for thousands of Honda-specific fault codes, including:

Engine Codes

• P0011 – Intake Camshaft Timing Over-Advanced
• P0299 – Turbocharger Underboost Condition
• P0300 – Random/Multiple Cylinder Misfire Detected
• P0172 – System Too Rich
• P0420 – Catalyst System Efficiency Below Threshold
• P219A – Air/Fuel Ratio Imbalance

Transmission & Drivetrain Codes

• P0847 – Transmission Fluid Pressure Sensor Circuit Low
• P0962 – Pressure Control Solenoid Control Circuit Low
• P17F0 – CVT Judder Detection
• P1890 – Transmission System Performance Fault

ABS & Chassis Codes

• C0035 – Left Front Wheel Speed Sensor Fault
• C0040 – Right Front Wheel Speed Sensor Fault
• C0051 – Steering Angle Sensor Fault
• C1111 – ABS Pump Motor Circuit Fault

Network Communication Codes

• U0100 – Lost Communication with ECM/PCM
• U0121 – Lost Communication with ABS Control Module
• U0155 – Lost Communication with Instrument Panel Cluster
• U0401 – Invalid Data Received from ECM/PCM

Body Control Codes

• B1000 – Control Unit Internal Failure
• B12C5 – Smart Entry System Fault
• B14A1 – Body Control Module Communication Fault
• B1A69 – Occupant Detection System Fault

And thousands of additional diagnostic codes, wiring diagrams, troubleshooting workflows, technical service information, and repair procedures.

Who Is This Manual For?

This manual is ideal for:

• Professional Honda service centers
• Independent repair garages
• Mobile mechanics
• Automotive technicians
• Performance vehicle specialists
• Honda Civic owners performing DIY repairs
• Automotive training institutions

If you are troubleshooting, maintaining, servicing, or repairing a 2020 Honda Civic, this is the factory workshop manual you need.