Catalytic Converter Catalytic Converter Catalytic Converter


home
about us
converter design
converter faq
converter failure
converter care
nox emissions
aftermarket converter
converter obd II
converter us law
converter links
converter news
converter replacement
site index
contact us

Discount Catalytic Converter
Catalytic Converter

Please support our site's generous sponsors.

Catalytic Converter
dot org
Contact Us

 
 
Catalytic Converter

Technical Bulletin 1995 - 2004 Honda Odyssey

1999-2004 HONDA ODYSSEY 3.5L V6 ENGINE

WE HAVE FOUND THE FOLLOWING CONDITIONS REGARDING THESE VEHICLES
WHICH MAY LEAD TO CATALYTIC CONVERTER FAILURE, OR FALSE CATALYST CODES:

We’ve been told that some Odysseys in these year ranges have exhibited a sticking thermostat. This is a very difficult fault to isolate because it is generally intermittent. The resulting problem is the vehicles will cool off during the drive cycle, and go into open loop.

The ECU is programmed for a richer fuel mixture in open loop, and this will damage a catalytic converter in a short amount of time. We do not know whether Honda has acknowledged this problem yet.
THERMOSTAT OE# 19301-P8F-A11
GASKET OE# 19305-PR7-A00

Some technicians have reported excellent results using an aftermarket thermostat with a slightly warmer heat range of 82C/180F as opposed to the original 78C/172F.


The second problem we’ve been made aware of is the possibility of a malfunctioning Intake Air Temperature Sensor (IAT).

Techs have told us that a telltale sign of a problem with the IAT may be a long term fuel trim reading that does not change from the reading at idle to the reading at 2500 RPM.

 

The problem again would be an incorrect fuel trim during the drive cycle either causing a too lean or too rich fuel mixture which may or may not set lean/rich codes, but will inevitably cause a catalyst code.

If your long term trim does not change when engine rpms are drastically changed, suspect a problem with the IAT.

 


 
 

home | catalytic converter care | about us | e-mail

ImageBuilders Web DesignCopyright 2004 ImageBuilders Web Design

 


Catalytic Converter Warehouse
Catalytic Converter

Please support our site's generous sponsors.


Catalytic Converter
Catalytic Converters dramatically reduce harmful exhaust emissions


Catalytic Converter
Catalytic converters typically consist of a ceramic or metal honeycombed monolith substrate that carries precious metal catalysts.