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Posts Tagged: catalytic converter

Catalytic Converter — What is it?

Catalytic Converter — What is it? First off, it’s a CATALYTIC converter, not a Cadillac converter. A catalytic converter is designed to convert pollutants from your engine into less harmless carbon dioxide and water through a catalytic reaction. A catalytic converter is part of the exhaust/emissions system A catalytic converter is part of the exhaust system. It’s usually mounted right after the exhaust manifold. The catalytic converter contains a ceramic honeycomb that’s coated you’ll find a ceramic honeycomb coated with a microscopic layer of precious metals like Platinum, Palladium, Rhodium, … Read More

Which catalytic converter is best?

Should you buy an OEM catalytic converter or aftermarket catalytic converter? There’s a HUGE difference in price between an OEM (dealer) and aftermarket catalytic converter so you may be wondering if they’re really different, and if so, how so? The answer is yes, there is a difference. But first, understand that OEM catalytic converters are designed to meet Federal emissions standards for NEW cars, which is 8-years or 80,000 miles. Plus, they’re designed to last the life of the vehicle. So factory OEM catalytic converters have a larger ceramic structure … Read More

What does a catalytic converter do?

What is a catalytic converter and how does it work? A catalytic converter is a metal container that houses a honeycomb ceramic structure that’s coated with certain precious metals like platinum, palladium or rhodium. The converter’s job is to transform harmful exhaust into Carbon Dioxide (CO2), Water (H20) and Nitrogen (N2). There are two types of catalytic converters: • Two-way catalytic converter— The precious metals store excess oxygen from the exhaust and use it to convert carbon monoxide (C0) into carbon dioxide by adding one oxygen atom. The metals also … Read More

Overheated catalytic converter

How a catalytic converter works

How a catalytic converter works, what it does A catalytic converter converts the various exhaust compounds of hardrocarbons (HC), Oxygen (O2), and Oxides of Nitrogen (N2) into more environmentally friendly gases. If a perfect world, all engines would burn the perfect combination of air and fuel in this ratio: 14.7:1 (air to fuel). After combustion, you would wind up with CO2, H2O and N2. Unfortunately, that never happens in the real world. How your car actually computes the air fuel mixture You’re constantly adjusting the gas pedal and the car … Read More

P2098

Fix code P2098 trouble code on Dodge Stratus, Sebring Trouble code P2098 on a Dodge Sebring or Dodge Stratus indicates that the downstream (post catalytic converter) is reporting a reading that’s consistently above or below center for a predetermined amount of time. Most DIYers replace the oxygen sensor and wonder why they still get the same code. In effect they’re treating the messenger and not the message. An exhaust system has two oxygen sensors. The first sensor tests how well the computer did in calculating air/fuel mixture. The second sensor … Read More

Fix Code P0420

Fix Code P0420 A P0420 code means your catalytic converter has failed an efficiency test. In other words, it’s not removing harmful combustion byproducts from the exhaust. Many people think that the way to fix code P0420 is to replace the oxygen sensors. That’s wrong. In fact, the vehicle comuter can’t even come to the conclusion that your catalytic converter has failed the efficiency test if your oxygen sensors are bad. So don’t waste your time and money on oxygen sensors. What goes wrong with a cat converter? Catalytic converters … Read More

Black smoke from tailpipe Saturn Vue and Oulook

Black Smoke from Tailpipe If you own a 2009-10 Saturn Outlook or VUE with the 3.6L engine, you may notice black smoke coming from the tailpipe on cold startups. Don’t flip out—it’s normal. Saturn is purposely running a rich mixture right after a cold start to get the catalytic converter operating faster. A rich mixture gooses the catalytic process. Of course, that’s exactly why misfires set off the flashing Check Engine light, to warn you that the converter is rapidly approaching meltdown. However, in this case, Saturn won’t let it … Read More

Fix code P0430

Code P0430 Catalyst System Efficiency Below Threshold (Bank 2) NOTE: Codes P0420 and code P0430 are similar. I wrote a much more detailed explanation of how an emission system works and what causes these codes. Read this post and then refer to this more detailed post. Code P0430 means the catalytic converter that treats the exhaust for Bank 1 has failed it’s testing. The oxygen sensor in front of the catalytic converter switches back and forth between rich and lean as the computer constantly changes air fuel mixture. But after … Read More

Catalytic Converter

Catalytic converter contain precious metals and are worth big money at recycling yards. Read More

P0420 after Catalytic Converter Replacement

Why do I get P0420 after Catalytic Converter Replacement Trouble Code P0420 is “Catalyst System Efficiency Below Threshold.” This coded sets if the computer see similar readings from both the pre- and post- converter oxy gen sensors. The pre-cat sensor should switch rich/lean. But the post-cat sensor should give a fairly steady reading, indicating that the converter is doing it’s job. Independent repair shops report that the majority of these P0420 codes after converter replacement are due to the installation of AFTERMARKET converters. They’re less expensive than original equipment, well, … Read More


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