What causes an emissions system to go bad?

When there is a problem with this system, you can experience a rough idle or stalling when the valve is stuck open. A commanded state that is not actually happening inside the valve is another issue that will set the check engine light on and cause emission failure.

What happens if you fail an emissions test?

If you happen to live in a state which requires emissions testing, you will fail the test if your secondary air injection pump is bad. A faulty secondary air injection pump will cause problems for the air-to-fuel ratio in your internal combustion engine.

What are the symptoms of a bad catalytic converter?

Symptoms of a Bad or Failing Catalytic Converter. 1 1. Reduced Engine Performance. One of the first symptoms commonly associated with a bad or failing catalytic converter is a reduction in engine 2 2. Rattling Noise. 3 3. Sulfur Smell from Exhaust. 4 4. Check Engine Light Comes On. 5 5. Failed Emissions Test.

How does the EVAP system work on a Chevy Trailblazer?

The EVAP system captures all fuel vapor from the fuel tank and sends them to the engines intake in order to be ignited in the normal combustion process. When there is a large leak in the Chevy Trailblazer’s EVAP system, it will throw the P0455 OBDII Code.

Why is the Check Engine light on on my Trailblazer?

It’s amazing how a small light on your instrument panel can ruin your day. Your Trailblazer is running fine then the “Check Engine” light appears. The list of causes can make your head spin.

What is the trouble code on a Chevy Trailblazer?

One of the most common trouble codes with the Chevy Trailblazer is the P0455 code. This trouble code references a number that is given to you when you plug your Trailblazer into a OBDII scanner.

Can a fuel leak cause a trailblazer to stop running?

While P0455 is not going to cause the Trailblazer’s engine to stop running, it should not be treated lightly. You could have a fuel leak. Pay extra attention to your tank level and make sure you are not leaking fuel. We recommend taking it in and/or dealing with it right away.