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.
SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSHONDA1994CIVIC DX, 4D SEDAN, AUTOMATICREPAIR AND DIAGNOSISENGINE PERFORMANCESYSTEMENGINE CONTROLS - TESTS W/CODES
1994 Honda Civic DX, 4D Sedan, Automatic
Engine Controls - Tests W/Codes
1994 Honda Civic DX, 4D Sedan, AutomaticSECTION Engine Controls - Tests W/Codes
- Introduction
- Self-Diagnostic System
- Diagnostic Trouble Code Charts
- Notes
- Engine Controls - Tests W/Codes
- Code/No Code - No Start Trouble Shooting
- Code 1 - Oxygen Sensor (O2S) Circuit D15B8 Federal Model
- Code 1 - Heated Oxygen Sensor (Ho2S) Circuit All Engines Except D15B8 Federal Model
- Code 3 - Map Sensor Circuit
- Code 4, 8 And/Or 9 TDC/CKP/CYP Sensor
- Code 5 - Map Sensor Circuit
- Code 6 - Engine Coolant Temperature (ECT) Sensor
- Code 7 - Throttle Position (TP) Sensor
- Code 10 - Intake Air Temperature (IAT) Sensor
- Code 12 - EGR System D15Z1 Engine Only
- Code 13 - Barometric Pressure (BARO) Sensor
- Code 14 - Idle Air Control (IAC) Valve
- Code 15 - Ignition Output Signal
- Code 16 - Fuel Injectors
- Code 17 - Vehicle Speed Sensor (VSS)
- Code 19 - Lock-Up Control Solenoid Valve
- Code 20 - Electrical Load Detector (Eld)
- Code 21 - VTEC Solenoid Valve
- Code 22 - VTEC Pressure Switch
- Code 41 - Heated Oxygen Sensor (Ho2S) Heater All Models Except D15Z1 Federal Model
- Code 41 - Heated Oxygen Sensor (Ho2S) Heater D15Z1 Federal Model
- Code 43 - Heated Oxygen Sensor (Ho2S) Circuit Or Fuel Supply System All Models Except D15B8 CALIF. Model
- Code 48 - Heated Oxygen Sensor (Ho2S) D15Z1 Federal Model
- Summary
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
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.