Question about 2000 Chevrolet Silverado 1500

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How hard/easy to replace the OEM catalytic converter. Can you show me how. thaknk

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The factory catalytic converters are welded in place. You can buy a replacement y pipe that has new converters or have an exhaust shop cut out the old ones and weld in new ones. Job can be difficult if exhaust has never been dropped before.

Posted on Dec 14, 2009

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P 0420 code on toyota corolla2004


Hi there:
A code P0420 may mean that one or more of the following has happened:
  • Leaded fuel was used where unleaded was called for
  • A damaged or failed oxygen sensor (HO2S)
  • Downstream oxygen sensor (HO2S) wiring damaged or connected improperly
  • The engine coolant temperature sensor is not working properly
  • Damaged or leaking exhaust manifold / catalytic converter / muffler / exhaust pipe
  • ******** spark timing
  • The oxygen sensors in front and behind the converter are reporting too similar of readings
  • Leaking fuel injector or high fuel pressure
  • Cylinder misfire
  • Oil contamination

About the possible solutions, some suggested steps for troubleshooting include:
  • Check for exhaust leaks at the manifold, pipes, catalytic converter. Repair as required.
  • Use a scope to diagnose the oxygen sensor operation (Tip: The oxygen sensor in front of the catalytic converter normally has a fluctuating waveform. The waveform of the sensor behind the converter should be more steady).
  • Inspect the downstream heated oxygen sensor (HO2S), replace if necessary
  • Replace the catalytic converter
Overall probably the biggest mistake vehicles owners make when they have a P0420 code is to simply replace an oxygen sensor (H02S). It is important to do proper diagnosis so you're not wasting money replacing parts unnecessarily.
We strongly recommend that if you need to replace the catalytic converter that you replace it with an OEM unit. Second choice would be a high-quality replacement part. There are many stories in our forums where folks replaced the cat with a cheaper aftermarket one only to have the code return shortly thereafter.

Hope this helps.

Dec 08, 2012 | 2001 Toyota Corolla

1 Answer

Check engine light code PO135, 02 heater circuit, bank1, sensor 1 for 2000 plymouth breeze


It is telling you that the oxygen sensor has failed. Replace the sensor, it is located in the exhaust pipe between the engine and the catalytic converter. The part runs around 40 dollars. It is fairly easy to spot, if you do not recognize it, purchase the replacement and look for the same critter on the exhaust.
I recommend getting the OEM sensor to save grief during install.
Hope this helps.

Jul 31, 2011 | 2000 Plymouth Breeze

1 Answer

Troubleshooting P0420 OEM Brand Honda A/F ratio concern Air leak near H2OS(heated oxygen sensor) Ignition system concern faulty catalytic converter


P0420 indicates the computer thinks the catalytic converter isn't working as well as it should. This is determined by the PCM evaluating the switch rate of the front and rear o2 sensors. Once the rear o2 sensor switch rate reaches a point close to the front o2 sensor it sets the code. This can be a result of degenerated catalytic converter, or in some rare instances, bad o2 sensors. In most cases repairing this condition requires replacing the catalytic converter with an OEM unit. Aftermarket converters don't have the same quality and quantity of the precious metals that make up the substrate found inside. This usually results in the code setting again in just a few months.

Oct 04, 2010 | Honda CR-V Cars & Trucks

1 Answer

Is there a problem with replacing a non OEM catalytic converter in a 2003 cadillac. I've heard of computer issues if not replaced with oem parts


there are problems if a converter is not put back in but doesnt have to be an oem one an aftermarket one works just fine

Sep 30, 2010 | 2003 Cadillac Deville

1 Answer

Replace catalytic converter


The oxygen sensors are easy to replace which takes a 22mm wrench or a special removal tool. The converters are the problem. These to my knowledge have to be welded on. A local shop usually sells aftermarket which are just as good because these have to meet the same standards. For your accord you should need one converter. If the Accord is a 4 cylin it will take 2 oxygen sensors and 6 cylinder takes 3. Usually there are one sensor at the manifold and one at the converter. I would buy aftermarket sensors. I work at Bosch and operate the line that makes these. These look different than your OEM but are actually the same or better. Aftermarket is about $40, OEM is about $70-110. You can buy the converters online cheap, but buying from a shop you can at least show up there if you have problems. You can replace the sensors after the converters are replaced which takes about 10 min to replace. Good Luck

Apr 19, 2010 | 1997 Honda Accord

2 Answers

Catalytic converter


The short answer is NO... It's not like changing a muffler in the "good old days". They are welded in and need to be cut out then rewelded, etc... not an easy job unless you have access to shop tools.
Can I ask WHY you need to change the converter??? They usually last as long as the car. I recntly sold a 1998 Olds with 245,000 miles on it and it had the original converter intact.
Good Luck

Jan 10, 2010 | 2000 Dodge Intrepid

1 Answer

Catalytic converter is bad on 1995 Subaru Legacy L Wagon


dearship parts are high.you can buy a factory catalytic converter or universal converter cheaper at auto parts place.they basic the same parts the.dealership has same catalytic converter.they put their price and labor rate charge an hour your pocket book will be empty.i have used universal catalytic converter.had no problem with it.the only difference is universal converter body a little shorter.but has same lengh as factory.if check engine is coming on you cant turn it off .if computer showing you a code.you could have a misfire causing rich exhaust emission.that can ruin a catalytic converter have it scan.dealership charge you about $130.00 .you can have it scan at advance auto or auto zone.to see what pcm code is.it could be oxygen sensor somethinh minor.

Jul 12, 2009 | 1995 Subaru Legacy

2 Answers

Bad catalytic converter?


Log onto www.partstrain.com. I believe they have Catalytic converters for your pathfinder for under $200.00, there OEM direct fit which means no cutting other then removing the old bolts.
If it is the Catalytic converter you can always buy it from on line and have a muffler shop install it like speedy or midas. Make sure you ask for stainless bolts and nuts.
Before you go through all the trouble, re check the DTC codes. Most of the time it's the O2 sensors that go bad and i question the garage charging you so much for the replacement of a catalytic converter.
Good luck and keep me posted.

Jun 01, 2009 | 1994 Nissan Altima

1 Answer

Catalytic converter


HI, this guide will help you with this replacement.

Step1 Lift your jeep. Unfortunately, the catalytic convertermag-glass_10x10.gif sits about midway down the length of your jeep, so lifting one end or the other will not do. Ramps are your best bet to get you within reach of the parts when working from home. Luckily, this is usually the hardest part of this repair. Step2 Be patient with the bolts, as they are often hard to remove due to size and awkward placement. You may have to drill or saw bolts to remove them. With this in mind, you should pick up new bolts, nuts and seals for your replacement project. Step3 Buy a catalytic converter specific to your jeep to avoid extra work. A generic part must be welded into the jeep, while a vehicle-specific model comes pre-welded to the proper pipes for easy bolt-on installation. Step4 Remove the 02 sensor (with an O2 wrench) before unbolting the catalytic converter. Then, you should remove the pipe connecting the sensor to the converter. Depending on your exhaust system, you may have to remove more pipes before you unbolt the converter from the muffler. Step5 Replace the old catalytic converter with a new one. This should be the easy part, as you simply bolt the new part in place. Step6 Reattach the exhaust pipesmag-glass_10x10.gif and 02 sensor, and the basic job is done. Make sure you replace any cracked or rusty pipes while you have the exhaust system apart.

  • Catalytic converters often fall under a separate emissions warranty that lasts at least 7 years and 160,000 miles. Even if your car is out of its regular warranty, but it is a newer model, ask your dealer to replace the part for you free of charge.
  • Rent the O2 wrench or socket if you do not own one. Most auto parts stores carry this tool for rentals.
  • In many states, older (vintage) cars do not need a catalytic converter, so you can gut it or remove it completely. No damage will result from running a car without a converter.
  • Due to emissions standards, it is illegal to buy or install used converters.
Please rate and god bless:)

Apr 20, 2009 | 1998 Jeep Wrangler

1 Answer

Engine code 430


did you use oem catalytic converters????? the aftermarket converters break down very fast. thats why they are cheap. we have to replace them all the time due to bad catalytic converters.

Oct 06, 2008 | 1998 Chevrolet Suburban

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