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:

Emission Guide training software EMISSION TRAINING GUIDE Basic Emission Control Systems, Diagnosis & Repair

All About Onboard Diagnostics II (OBD II)

Advanced Diagnostics: Mode 06

Basic Emission Control Systems Overview

Catalytic Converters

Catalytic Converter Thefts

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

Emissions testing update

EVAP Evaporative Emission Control System

Exhaust Emissions Diagnosis

EGR (Exhaust Gas Recirculation) systems

Fixing Emission Failures

How Fuel Injection Affects Emissions

Engine Sensors (basic types of sensors & what they do)

I/M 240 Emissions Testing

Misfire Diagnosis

OBD II Driveability & Emissions Problems

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

OBD II Emissions Testing

Oxygen (O2) Sensors

Wideband O2 Sensors & A/F Sensors

P0420 Catalyst Code (How to Diagnose & Repair)

Positive Crankcase Ventilation (PCV)

Sensing Emission Problems (more on O2 Sensors)

Troubleshooting Intermittent Engine Problems

Vacuum Leaks (how to find & fix)

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

Mitchell 1 DIY eautorepair manuals

Mitchell Repair Information for the Do-it-Yourselfer