Check engine light turned on

Hi,

Is it the same code as before? Also, do you have the code? If you do, let me know what it is.

As far as the catalytic converter, are you experiencing any odd smells, loss of power, or anything out of the ordinary?

Here is a link that explains the most common symptoms of a faulty converter. Take a look through it.

https://www.2carpros.com/articles/bad-catalytic-converter-symptoms

Let me know what codes are showing up. That will help me narrow things down.

Take care,

Joe

Hi,

The idea that you smell fuel can be several different things. Also, since they are unable to find any new codes, how do they know the converter is the problem again? If you are smelling fuel, it could be a leak or an emissions component issue. The idea that you can't fill the fuel tank easily is likely related to the EVAP system.

Here is what I need you to do: First, make sure there are no fuel leaks. Check for evidence of a leak under the hood and vehicle. Most times, fuel evaporates before you get the chance to see it. However, it usually stains the area it leaks on.

Next, if there are no fuel leaks and the vehicle is safe to drive, we need to drive it until the check engine light comes on. That should point us to the issue. It is likely going to indicate something with the EVAP system (evaporative emissions system).

Also, if it is a converter-related issue again, the smell may indicate too much fuel being burned by the engine. If you have a misfire, raw fuel can get into the converter and damage it, so that is another possibility.

Overall, we need to see if codes are set. Otherwise, it becomes a guessing game. But, we need to make sure there are no fuel leaks.

Let me know.

Joe

Kim,

The P0431 indicates a failed catalytic converter, bank 2. If that is the one that was replaced, it should have a warranty. I attached a pic below showing the converters.

Now the P0455 indicated a large evap leak. This is in the evaporative emissions system. Since it is a large leak, it shouldn't be too hard to find. Make sure the fuel cap is tight, check the fuel filler tube for rust damage, Also, open the hood and locate the EVAP charcoal canister. It is near the brake master cylinder. Check the vacuum hoses attached to it for damage. Also, follow the hoses to the engine and one to the fuel tank and check for issues.

Pic 2 shows the charcoal canister.

I can't be sure, but there is a chance if we can get this leak fixed, the converter will be fine. A large leak is causing an engine vacuum leak. If the fuel mixture is lean enough, this could be throwing the oxygen sensors off causing the code.

Let me know what you find. Also, here is a link you may find helpful. It explains how to test for an engine vacuum leak.

https://www.2carpros.com/articles/how-to-use-an-engine-vacuum-gauge

Let me know what you find.

Joe