Symptoms of a Bad or Failing Catalytic Converter

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Cost of Replacing a Bad or Failing Catalytic Converter

Common signs include reduced engine performance, rattling sounds, and the Check Engine Light turning on. Our certified technicians can come to you and diagnose the problem. You will receive a $30 credit towards any follow-up repairs that result from the diagnostic. Following are example prices for Catalytic Converter Replacement. Click on the button below to get an upfront quote for your car.

Cars Estimate Parts Cost Labor Cost Savings Average Dealer Price
2004 Nissan Xterra $1032 $961.68 $70.00 3% $1069.18
2008 Toyota Matrix $670 $530.20 $140.00 10% $745.20
2010 Kia Rio $996 $897.76 $98.00 5% $1048.26
2004 Cadillac SRX $1062 $894.44 $168.00 7% $1152.44
2011 Mercedes-Benz ML550 $1422 $1205.19 $217.00 7% $1538.44
2006 Jaguar X-Type $1484 $896.05 $588.00 17% $1799.05
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How to Diagnose a Bad or Failing Catalytic Converter?

catalytic converter

A catalytic converter is a car component that works to reduce vehicle emissions and pollution. It is a metal canister that is installed in the exhaust system. It is filled with a chemical catalyst, usually a platinum and palladium mixture, and helps to convert the vehicle’s emissions into non-harmful gasses. Usually a faulty catalytic converter will produce a few symptoms that alert the driver that replacement may be required.

1. Reduced engine performance

One of the first symptoms commonly associated with a bad or failing catalytic converter is a reduction in engine performance. The catalytic converter is built into the vehicle’s exhaust system, and as a result, can affect the performance of the engine if it develops any problems. A clogged converter will restrict exhaust flow, while a cracked one will leak. Both can negatively affect engine performance and can cause a reduction in power and acceleration as well as fuel economy.

2. Rattling noise

Rattling noises are another symptom of a bad or failing catalytic converter. If a catalytic converter becomes old or damaged internally from excessively rich fuel mixtures, the catalyst coated honeycomb meshes on the inside of the converter can collapse or break apart, causing a rattle. The rattle may be more obvious when starting the vehicle, and will get worse over time.

3. Check Engine Light comes on

A bad or failing catalytic converter can also cause an illuminated Check Engine Light. The oxygen and air fuel ratio sensors that modern vehicles are designed with monitor the efficiency of the catalytic converter by monitoring the gas levels in the exhaust. If the computer detects that the catalytic converter is not operating correctly, or not catalyzing the exhaust gases properly, it will set off the Check Engine Light to alert the driver that there is a problem. A Check Engine Light can also be activated by a variety of other problems, so it is recommended to have the vehicle scanned for trouble codes to be certain of the issue.

The catalytic converter is one of the most important emissions components found on modern vehicles. Without it, the vehicle may produce excessive emissions and have trouble passing the emissions tests that are required in some states. If you suspect that your catalytic converter may be having a problem, have the vehicle inspected by a professional technician, such as one from YourMechanic, to determine if the car will need a catalytic converter replacement.

Check Engine Light
catalytic converters
rattling noise
exhaust system

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Recent Catalytic Converter Replacement reviews

Excellent Rating


YourMechanic Catalytic Converter Replacement Service

Average Rating

4.7/5

Number of Reviews

79

Rating Summary
71
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1
71
7
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1

Luis

9 years of experience
9 reviews
Luis
9 years of experience
Luis was great, he knew exactly what to do and had all the tools to do it. He was friendly and even showed up early.
2009 PONTIAC G8 - CATALYTIC CONVERTER - RIO RANCHO, NEW MEXICO

Cody

5 years of experience
18 reviews
Cody
5 years of experience
Cody waa time savy, communicated very well, and made the service that much more worth it . would book again in the future without a doubt.
2009 TOYOTA COROLLA - CATALYTIC CONVERTER - ARLINGTON, TEXAS

Michael

13 years of experience
312 reviews
Michael
13 years of experience
Very professional. Called ahead to let me know he could come out earlier if it was ok. Got work done quickly, left no mess and clean up behind.
2006 CHRYSLER PACIFICA - CATALYTIC CONVERTER - MARIETTA, GEORGIA

Dallas

26 years of experience
76 reviews
Dallas
26 years of experience
Dallas is very knowledgeable about the mechanics of a vehicle...friendly...professional...goes above and beyond and what I like most is that when you send a message to him....you get a response back at a reasonable time even if it had nothing to do with what he is working on. He answers general questions about the workings of a vehicle so you can have knowledge of it and the concerns you might have about it.
2001 TOYOTA SEQUOIA - CATALYTIC CONVERTER REPLACEMENT - BALTIMORE, MARYLAND

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