Questions tagged [catalytic-converter]

Device placed within the exhaust system used to catalyze pollutant gasses found in exhaust gasses. Is normally located after the exhaust header, but before the muffler. Can be configured as 2-way or a 3-way: the 2-way affecting hydro-carbons (HC) and Carbon-monoxide (CO) gasses; the 3-way affects Nitrogen Oxide (NOx - do not confuse with Nitrous Oxide or NO2) as well.

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Does anyone the location of the serial numbers for 2004 CARB Subaru Outback Catalytic Converters?

I replaced most of my exhaust system a few years ago (catalytic converters and O2 Sensors) because of a P0420 error. My car came from a state that required the vehicles to meet strict emissions ...
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Does engine oil compensate below-threshold Catalytic Converter performance?

I have a Toyota Yaris 1.3 VVT-i with 2SZ-FE engine. The car has 100K of mileage (I recently bought it with no service history). Most importantly, its check-engine light is on for "catalytic ...
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Suzuki SX4, P0134/ P0420, sensor or CPU?

So, my friend is having car trouble with their Suzuki SX4, 2007. I was told the car had some issue with the catalytic converter in the past. The mechanic told them it would cost $2000, but that it ...
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1994 Chevy 1500 loss of power slow acceleration what could this be

Chevy having slow acceleration when driving I was told it could be my catalytic converter could it be fixed by replacing with new exhaust system
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Citroen C2 Catalytic converter replaced with patches

I just had a new catalytic converter fixed by a local mechanic and there are few patches visible. Wondering if this is sloppy work and might cause issues soon. Could any one help me understand if this ...
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Replacing catalytic converter from cut pipe

How would I go about replacing a catalytic converter (2003 Honda CR-V incidentally) when the exhaust pipes were cut as shown in the following pics? Can I mount it somehow without welding it? Most of ...
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47 views

2014 Cruze Diesel

can't find replacement converter for car GM not making at this time been in dealer ship since Nov. can the converter be reemed out and reinstalled or will removing the back pressure cause low power ...
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dashboard light to replace catalytic converter, later engine loud dash light disappears

A engine checklght appeared on my 2004 Hyundai Elantra GT hatchback, and was diagnosed as a faulty catalytic converter, that was considered normal for the age of the car. About 3 days later when i ...
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High voltage on downstream O2 sensor after driving, but low voltage on idle

After driving on the highway, my downstream O2 sensor voltage was a steady 0.8V, which is high. On the other hand, when idling before the drive, it was a steady 0.3V. Is it normal for the downstream ...
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Painting a Front Catalytic Converter — Bad Idea or Not?

I need to replace the front catalytic converter on my 2006 Suzuki Aerio. The part came in bare metal, no paint or any coating is visible or possible to feel on the surface. Should I not paint it to ...
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Replaced my 5 cylinder Volvo V70 2.5l turbo engine with a 6 cylinder S80 2.9l twin turbo engine and I'm having trouble with the exhaust

Replaced my 5 cylinder Volvo V70 2.5l turbo engine with a 6 cylinder S80 2.9l twin turbo engine and I'm having trouble with what to do about the exhaust. The original 5 cylinder had only 1 turbo, 1 ...
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Incomplete Catalytic Converter Monitor on otherwise flawless old Tacoma

I have a 2000 Toyota Tacoma with 250k miles on it that runs like a champ. But, after some repairs, the catalytic converter monitor (or catalyst monitor) has never set. Every mechanic has told me ...
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I have a 2000 ford contour 2.0 runs fine but will not get any faster then 40 mph no matter how much throttle I give,

Motor runs fine transmission shits fine has full rpm range all gears but at 40 it will not run any faster no matter how much throttle you give
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Catalytic Converter Clogged, But with what?

So, I've recently replaced my catalytic converter, bank 1 and 2. Both were a pretty penny (About $1,500 Each), I inspected the old catalytic converters and they look to have failed due to being ...
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Is my catalytic converter bad?

I have a 2006 Lexus LX 470 and I’m getting the check engine light on. I have a reader and I am seeing P0430 “ catalyst efficiency below normal (bank 2). I took some data from the sensors and plotted ...
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How to determine if P0430 is O2 or catalytic converter

2009 CTS4 3.6L P0430 catalyst below efficiency bank 2 comes on periodically. (There are no other codes being thrown.) I put a data logger on it today on my drive to work and the rear sensor is ...
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Breaking in a new catlytic converter?

I read somewhere you need to break in a new catalytic converter. To that end: Is this accurate? What is the purpose of breaking one in? How do you break it in?
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What socket fits the Catalytic-converter-to-Exhaust-manifold stud?

I'm trying to replace the exhaust manifold on my 2010 Chevrolet Equinox (2.4L 4-cylinder), and there are studs which connect the catalytic converter to the exhaust manifold. I cannot, for the life of ...
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Does cat removal disable check engine light?

If you remove the cat I imagine the ecu would have been reprogrammed to make it ignore o2 sensors readings? If so would this be considered a remap? When Changing the ecu in this way would it cause ...
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Do I need to replace my catalytic converter or it could be exhaust leak?

I have WV Polo 1.2 petrol from late 2005 with 170k. Recently I got the check engine light and I went to non official repair service (since there isn't one in my country). They told me it's the oxygen ...
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Check engine light, p0420 error and o2 sensor voltages

Good Evening, Some time ago I bought a used KIA ceed 2009. I've checked it with a mechanic who found it clean. The car was stationary for a long time and with little gasoline in the tank. I changed ...
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599 views

Potential for failing PCV valve causing intermittant p0420 (catalyst efficiency below threshold)

The car is a 2002 Honda CRV with the 2.4 VTEC engine. Had it about two years, and I've done a fair amount of maintenance on it at this point. It's got a nagging, intermittent p0420 code. And ...
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Catalytic converter tests

Got a Mk 6 Fiesta with an engine light on, and showing a code for under performing cat or oxygen sensor. Connected a vacuum gauge to my intake port and it's pulling a very good level of 25. Might run ...
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Testing whether engine stutter/hesitation is caused by catalytic converter

I have a 2005 Ford Expedition, from my dad, which stutters and hesitates to accelerate. Sometimes it barely has a problem and sometimes it's bad. It has new spark plugs and spark plug coils which the ...
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Protecting the Mating Surface between the Catalytic Converter and Header

In the midst of replacing my Catalytic Converter on my 03 Nissan 350z, I have taken off the Catalytic Converter to reveal a pretty rusty mating surface between the two components. My question is what ...
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2011 Chevrolet equinox check engine light

I got my 2011 Chevy Equinox back from the dealer for the engine repair on the oil consumption. This was covered by Chevy due to a class action lawsuit regarding this issue. Today, a week after getting ...
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Can a car operate without a catalytic converter?

So I was reading this Quora question which answers in the affirmative, but here's my misgiving: I was under the impression that the oxygen sensor which the ECU uses to adjust the fuel-to-air ratio, is ...
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Car wont go past 20mph before stalling out- 2003 lexus es300

timeline of issue: -battery light comes on -AutoZone employee says to replace the alternator -car won't start at night, so I get a friend to jump start it -while driving home the car starts to die....
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Can A Catalytic Converter Fail Due to Age?

Suppose that a car has 120,000 miles on it and the catalytic converter fails. From what I read (see here as an example), age doesn't appear to be a general cause for failure. Is this a possibility ...
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Are my cats bad? — secondary O2 sensor voltage

I have a 2002 BMW M3, and I've been trying to track down a poor fuel economy issue for quite some time now. My long term fuel trims are high (+7%-10%), and when I had the car on the dyno a couple ...
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102 views

Error code P0421 - warm up Catalytic converter efficiency below treshold (bank1) - problem with Catalyst Monitor Bank 1? (Mazda 5, 2014)

I have Mazda 5, 2014, about 40K miles There is error code: p0421 - warm up Catalytic converter efficiency below treshold (bank1) Engine is not vibrating, so I assume this is not a problem with spark ...
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112 views

Faulty O2 sensor identification

The car is a 2006 BMW 325i (N52B25 engine). The problem started out as a performance issue (car didn't pull quite that hard), after a while it turned into more serious issues like low rpm stuttering/...
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192 views

Should catalytic material be between upstream and downstream o2 sensor?

I have just purchased a replacement catalytic converter. Using a flashlight, I can see the catalytic material inside the converter. When I was inspecting it, it looks like both the upstream and ...
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Want to clean EGR passages using shop vac, worried about debris from broken catalytic converter getting into exhaust manifold

I need to clean the EGR valve and passages on a 1998 Honda Accord 4 cylinder. Needless to say I would like to vacuum the debris out after scraping it up, the catch is that this vehicle possibly has ...
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Is the catalytic converter broken? An odd rope is coming out of the exhaust pipe

Old Volvo GL 440 and this is coming out of the exhaust pipe. No noise, all working fine but this cosmetic thing: does it mean that the exhaust gases are now not well filtered out? Does this mean that ...
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Coolant in the cat, can it be saved?

The catalytic converter on a 2007 Mazda RX-8 is full of engine coolant. Is there any way this can be saved or do I need a new cat? It seems to me that coolant won't melt the cat like unspent fuel or ...
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How long will my motor last having clogged catalytic converters?

My catalytic converters have been clogged for awhile, and the o2 sensors need changed because of this. What is it doing to my engine? And gas mileage for that matter? If i take out my ...
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Battery died a few months ago. Since then catalytic converter smog test not passed

I have an old 2000 Camry car that died in storage and so I replaced the battery 4 months ago. That reset all the monitors. Since bringing it back up it also had a check engine light which required me ...
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does straight piping your car remove catalytic converters?

I have a 2014 dodge charger hemi r/t. I'm looking to make it louder and i was just concerned about the cats being removed if I straight pipe it.
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Catalytic converter without heat shield?

My car was making a rattling noise when driving with very low RPM and slow, or very high RPM and fast. When cruising it was OK. Drove car to the mechanic and he said that cat is broken. He replaced ...
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How many catalytic converters does a VW CC 2010 2.0L Sport have?

I have a P0420 code on my VW CC 2010 and I've narrowed it down to a faulty catalytic converter. I have edited this photo to try and explain easier. In the red circle is the catalytic converter I ...
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Would a hole in the catalytic converter cause code p0420?

VW CC 2010. Catalytic converter was replaced when I first got the car at 78k miles. It is now at 83k miles. Downstream oxygen sensor was replaced at 80k miles. There is a small leak in the catalytic ...
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84 views

Mercedes Benz Vito 116 cdi

Is it is safe to remove the "cat" in my vehicle? I have been losing power even after replacing the turbo.The cluster lights up the "diesel particle filter" sign. I have intermittent bursts of black ...
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2003 Dodge ram 1500 4.7 v8

My 03 Dodge ram 1500 is cutting out, won't stay running. I've changed all 8 spark plugs and all 8 coils, I had to replace the breather box and assembly as well because my ex had tried to put a cold ...
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Removing catalytic converters on a 2000 v6 Mustang?

I live in Oklahoma, so we don't have to get emissions checked. I have a 2000 v6 3.8l Mustang. I bought the car for $3500 at 70k miles (it was a really good) so I don't want to spend more money than I ...
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catalytic converter

i have 170,000 miles on my car, no problems driving, but my check engine light is on. i took it to a auto parts shop and it read that I needed a knock sensor or catalytic converter, so I changed the ...
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Is my cat dead?

My car is a 2003 bmw e46 with 2.2 petrol engine. Just bought an elm 327 Bluetooth scanner and did some testing with it. Below are some graphs made with ScanMaster app. This is lambda output voltages ...
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P0430 (Catalyst System Efficiency Below Threshold) Toyota Camry 2005 V6

I have a 2005 Toyota Camry V6. The check engine light was on for while and I cleared it once using an OBD2 reader. It didn't come up for while. I used the .87 petrol and I thought that is what ...
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Nagging P0430 (and now a pending P0420 too!) 2004 Lexus ES330

I've got a 2004 ES330 (2nd owner) with roughly 315,000. We didn't pay much for the car in 2012 with 164,000 miles. So, i've never gone overboard in maintenance of it. A year ago, when it was time for ...
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Catalytic Converter self-service

Can I remove catalytic converter, remove loose fragments, then put it back on without harming vehicle? I have a 2003 Ford Windstar.