Check engine light on

Hi Carl, the short-term fuel trims normally should be between -10% and +10%. If the engine is under a heavy load and you are pressing hard on the throttle, it will increase above +10%. The higher gears will normally place more of a load on the engine, so that is a possibility.

So, can you tell me if there are drivability issues? Also, have you retrieved any diagnostic trouble codes indicating a problem?

Let me know as much as you can. I will watch for your reply.

Take care,

Joe

Hi,

The fuel filter is a good idea. If it is restricting fuel delivery, it certainly can cause a lean mixture. As far as the regulator, here is a link that explains how to check the fuel pressure and the regulator:

https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator

Since the lean mixture is only bank 1, I have to ask. Are there any exhaust leaks? If you have one upstream, it can create a lean signal to be provided by the downstream sensor.

Let me know.

Joe

Hi,

A vacuum leak would cause a lean fuel mixture. Do you know what the short-term fuel trims are? Also, since it is only one side, make sure you don't hear a ticking sound from in front of the catalytic converter (manifold) which can cause a lean mixture.

I attached the description and possible causes below. Note: that one is an exhaust leak pre catalytic converter. That's why I'm suggesting it could be an issue.

Also, toward the end of the descriptions are directions specific to circuit testing. Take a look through them and let me know if you feel comfortable doing them.

Let me know.

Joe

See pics below.

Hi,

No, sir. You are not wrong. Based on the info you provided, that is very possible. I may have already asked, but have you checked fuel pressure, for vacuum leaks, and the engine coolant temperature sensor signal? Also, are there any exhaust leaks?

Let me know.

Joe

Hi,

I believe fuel pressure should be between 55 and 60psi at idle. However, if it is a flex-fuel vehicle, 45 is likely correct.

Let me know.

Joe

Interestingly, the P2200 isn't listed on this year and model. See pic 1.

The code itself indicates that NOx gases readings are out of parameters. In most cases, the code is set due to a faulty catalytic converter. However, that usually happened due to a different problem such as a misfire, rich fuel mixture, high fuel pressure, and the list goes on.

Again, both the P219A and the P2200 are related to bank one, so that is where the issue is.
So, I have a question. Are there any exhaust leaks? Do you have an infrared thermometer?

If you do, allow the engine to reach operating temperature. Check the temperature of the exhaust pipe before and after the bank 1 converter. See if there is a big difference in the temperature. If there is, chances are it is the converter.

If there is an exhaust leak before the converter, it will indicate a lean fuel mixture causing the computer to compensate by adding fuel. (The high fuel trim 33%)

Let me know.

Joe

Carl,

You are very welcome. It's tough not being there, so hang in there. We'll get it figured out one way or another.

Take care,

Joe

Hi,

The readings actually are cooler than I expected. With the idea that the vehicle is producing high Nox gases (P2200), we are likely to have a vacuum leak specific to the bank involved. Have you checked all around the intake manifold and are you certain there is no pre catalytic converter exhaust leak?

As far as the temperatures, where there is a variation of approximately 200+ degrees, that usually indicates a problem. You are nowhere near that.

Recheck the intake for leaks where it mounts. Also, try this and let me know the results. Attach your scanner. With the engine at idle check the MAP sensor parameters. The readings should be between 2.7 and 6 PSI.

Let me know.

Joe