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Emission Control Diagnosis and Repair Help
Emission Control Repair Topics:
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Onboard Diagnostics:
All About Onboard Diagnostics II (OBD II)
OBD II Driveability & Emissions Problems
OBD II Basics Self-Test Quiz (Download or Print PDF file)
Advanced Diagnostics: Mode 06
Engine Sensors (basic types of sensors & what they do)
Basic Emission Controls:
Basic Emission Control Systems Overview
Oxygen (O2) Sensors
Wideband O2 Sensors & A/F Sensors
Catalytic Converters
Catalytic Converter Thefts
EGR (Exhaust Gas Recirculation) systems
EVAP Evaporative Emission Control System
Positive Crankcase Ventilation (PCV)
Emission Control Basics Self-Test Quiz (Download or Print PDF file)
Emissions Testing & Diagnosis:
Emissions testing update
OBD II Emissions Testing
I/M 240 Emissions Testing
Exhaust Emissions Diagnosis
Fixing Emission Failures
How Fuel Injection Affects Emissions
Misfire Diagnosis
P0420 Catalyst Code (How to Diagnose & Repair)
Sensing Emission Problems (more on O2 Sensors)
Troubleshooting Intermittent Engine Problems
Vacuum Leaks (how to find & fix)
Automotive Environmental Issues:
Automotive Environmental Issues
The Unforeseen Environmental Impact of Air Conditioning (Sept 2021)
Global Warming and Climate Change: What Do We Know Now? (March 2019, Updated April 2022)
CO2 Emissions (global warming issues) (December 2020)
Is water Vapor in Car Exhaust Affecting Our Weather? (January 2024)
SUVs Versus Trees: The Environmental Challenge
The Birth, Evolution and End of Automotive Emission Controls
Toxic Chemicals In Your Car's Interior