Check engine light comes on. The catalytic converter changes this into sulfur dioxide which is odorless.

What Are The Bad Catalytic Converter Symptoms

When the light pops on your car s engine control module ecm will also store a diagnostic trouble code often a p0420 code in its memory.

Symptoms of a bad catalytic converter nissan altima. Here are the most common signs of a bad catalytic converter in a nissan altima. When failing you may notice a sulfuric rotten egg like smell coming from the exhaust. Reduced acceleration sluggish engine performance excessive heat under the vehicle dark exhaust smoke the smell of sulfur or rotten eggs from the exhaust.

A bad or failing catalytic converter can also cause an illuminated check engine light. Check engine light turns on usually an illuminated check engine light is the first and only sign of a bad catalytic converter. In some cases a catalytic converter will become plugged up and cause an exhaust restriction.

Unburnt fuel left in the exhaust by the bad catalytic converter produces the odor and may even cause dark exhaust smoke. Catalytic converter need regular maintained further small symptoms of a bad catalytic converter are. If the problem is that the catalytic converter is clogged you can try an italian tune up essentially this is just driving your vehicle harder than usual for a few miles to increase the temperature of the cat.

But be warned the cat is close to the cly head and pieces of the cat can be. There are certain signs that can indicate a problem with the catalytic converter of your nissan altima such as the following. Clogged exhaust causes lack of power on acceleration.

A lack of engine power. Fuel efficiency reduces significantly problems with starting your car failure to accelerate even after stepping on the gas pedal. Service engine soon light any vehicle made in the last 20 years is going to have an onboard obdii computer.

An inefficient or failing catalytic converter can leave more unburnt fuel in the exhaust which will smell like sulfur or rotten eggs. After the cat converter breaks apart the exhaust gets plugged up. Mpg suffers as the exhaust flow begins to slow your gas mileage will as well.