Emission Problem Diagnosis & Repair Help for Common Emission Control Problems
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Emission Control Repair Information

catalytic converter reduces exhaust pollutants

Emission Control Repair Topics:

Understanding OBD II Driveability & Emissions Problems

Fixing Emission Failures

All About Onboard Diagnostics II (OBD II)

Advanced Diagnostics: Mode 06

Basic Emission Control Systems Overview

How Fuel Injection Affects Emissions

Exhaust Emissions Diagnosis

Troubleshooting a P0420 Catalyst Code

Catalytic Converters

Catalytic Converter Thefts

Exhaust Gas Recirculation (EGR)

Positive Crankcase Ventilation (PCV)

EVAP Evaporative Emission Control System

Making Sense of Engine Sensors

Oxygen (O2) Sensors

Wideband O2 Sensors & A/F Sensors

Sensing Emission Problems (more on O2 Sensors)

Driveability Diagnosis: Misfires

Troubleshooting Intermittent Engine Problems

Finding & Fixing Vacuum Leaks

Understanding Oxygen (O2) Sensors

Sensing Emission Problems (O2 Sensors)

Emissions testing update

OBD II Emissions Testing

Evolution of I/M 240

OBD2 Basics Self-Test Quiz (Download or Print PDF file)

Emission Control Basics Self-Test Quiz (Download or Print PDF file)

Automotive Environmental Issues:

Automotive Environmental Issues

SUVs Versus Trees: The Environmental Challenge

The Environmental Challenge Now Is CO2

Toxic Chemicals In Your Car's Interior

Automotive Emissions Related Resources:

California Air Resources Board (ARB)

California Bureau of Auto Repair

California South Coast Air Quality Mgmt. Dist.

Department of Transportation (DOE)

Environmental Protection Agency (EPA)



Hybrid Vehicle Center

Sierra Club

Mitchell 1 DIY eautorepair manuals

Mitchell Repair Information for the Do-it-Yourselfer