Code 67 - Catalyst System Efficiency Below Threshold
Your Catalytic Converter is dead. I got this code, replaced the cat with a Carsound high-flow cat, and the code magically went away. What this code means is that your mostly-useless secondary o2 sensor is reading that there's a lot of unburnt fuel still present in the exhaust, meaning that the catalytic converter isn't doing its job. Thus, the system efficiency is below threshold.
Code 45 - System Too Lean/System Too Rich
First, lets look at why your catalytic converter died, because it should last a while.
If you read this article on Team-Integra.net, it will say:
<font size="2" face="Verdana, Helvetica, sans-serif">So it looks like that answers the question of whether or not you're running rich or lean. If I had to put my money on it, I'd say you were running rich, and this richness destroyed your cat.<u>Excess Fuel Overheating The Catalytic Converter</u>
An engine that is performing at peak efficiency will burn all the fuel in the combustion chamber during the combustion process. An engine that is not performing properly, that is not burning all the fuel, will allow unburned or excess fuel to enter the exhaust system. When this excess or unburned fuel contacts the hot core of the converter it will ignite. This constant infusion of unburned fuel will cause temperatures to continuously rise above the designed operating temperature until the core of the catalytic converter will actually melt. Possible causes for the excess fuel entering the exhaust system are an incorrect fuel mixture, incorrect timing, corroded spark plugs, worn and cracked ignition wires, improper fuel pressure, a faulty oxygen sensor, sticking float, faulty fuel injector or a malfunctioning check valve.
<font color="#a62a2a" size="1">[ December 20, 2004 01:14 PM: Message edited by: 01TypeR ]</font>
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