The Vehicle Emission Control Label is located under the hood of your car
and will help you identify the type of emissions platform
that your vehicle came equipped with from the factory. 
These labels may be one of these locations:

A COMPLETE DIAGNOSTIC MANUAL
FOR TROUBLESHOOTING THE
OBDII CATALYTIC CONVERTER

Following is a complete Diagnostic Manual in helping you diagnose and troubleshoot problems with a vehicles emission system and the possible replacement of emission parts including the catalytic converter.

TECHNICAL SERVICE BULLETIN

2004-2006 TOYOTA CAMRY, SOLARA AND SIENNA

3.3L 3MZ-FE ENGINE

Catalytic Converters Don’t Fail on Their Own!

It is Important to Check the Following Prior to Converter Replacement:

Toyota Camary, Solara, Sienna
DTC PO171 or PO174 Engine Running Lean

The following Toyota factory bulletin refers to codes P0171 and P0174, lean conditions on either or both banks, but this raises cause for concern when diagnosing catalytic converter codes as well. This bulletin is acknowledging there may be a problem with the Intake Air Control Valves on 2004 Camry, Sienna and Solara vehicles with 3.3L (3MZ-FE) engines.

TECHNICAL INFORMATION BULLETIN

GENERAL MOTORS 3.5L & 3.9L ENGINES

TECHNICAL INFORMATION BULLETIN

GENERAL MOTORS 3.5L & 3.9L ENGINES

Some customers  may experience P0420, P0430 as well as P0300 to P0306 misfire codes along with melted converters on the above vehicles.

TIGHTENING PROCEDURE FOR
ALL MANIFOLD CONVERTERS

TIGHTENING PROCEDURE FOR
ALL MANIFOLD CONVERTERS