Symptoms of Catalytic Converter Failure

If you feel that you have a failing diesel catalytic converter experts advise to take your car to a mechanic and get a full diagnosis of the problem. A diesel catalytic converter is an extremely important part of the car’s exhaust system. It is used to convert all the harmful gasses in the whole exhaust systems and so change them into safe compounds that can be easily emitted into the atmosphere and cause much less damage to the environment. The diesel catalytic converter is placed between the engine and the exhaust muffler on the car’s underside. It is not a common problem for a diesel catalytic converter to fail. As a rule, problems caused by external damage or overheating occur.


The engine system misfiring can cause the diesel catalytic converter to overheat. Sometimes the same effect can occur because of rich fuel mixtures when this mixture enters the catalytic converter of the car and is ignited. As experts from specializing on diesel exhaust systems, this kind of situation may cause your whole diesel catalytic converter’s components to melt.

Check Performance

Exhaust may become trapped in front of the diesel catalytic converter and there may appear some latent reduction in performance. The sudden increase in the back pressure of a car can become a cause for your engine to stall during the drive. This fact will take place even if there might be an air lock in the whole vehicle’s system. This issue will cause your car jerk or even the feeling of no petrol reaching the engine when you will be pushing the accelerator.

Exhaust System

Assessing the cause of a diesel catalytic converter failure can sometimes be traced back to some error occurrence in the fuel system of a vehicle. The most obvious distinctive sign of this problem is some restriction in the performance of the vehicle’s exhaust system. This will indicate heavy melting of diesel catalytic converter materials inside the car.


Another way to identify whether a diesel catalytic converter is failing is to take out your car’s oxygen sensors from the exhaust for some period of time. In case you see an obvious alteration in the performance of the car then you can be absolutely sure the diesel catalytic converter has clog and is failing.

Alien Chemicals in the Converter

Some contamination of the chemical mechanisms inside the diesel catalytic converter, which is caused by the addition of substances like motor oil or antifreeze can usually prevent the diesel catalytic converter from performing correctly. As a rule, you will see a raised level of carbon emissions from the diesel catalytic converter. If you noticed that, then experts in Honda catalytic converter systems advise to simply replace the diesel catalytic converter before it is going to damage your entire exhaust system.