Inquiry on few codes MAF and ECM?

Hi,

The codes are likely tied together. It indicates low airflow as well as a rich fuel mixture. Are there any restrictions in the air box or inlet tube?

Also, have you checked the fuel pressure to confirm it isn't too high? If you haven't, that should be considered. Here is a link that you may find helpful:

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

Also, if you haven't already, you may want to service the MAF sensor and throttle body. The MAF is on the air intake. See pic 1.

Here are two links you may find helpful:

https://www.2carpros.com/articles/throttle-actuator-service

https://www.2carpros.com/articles/mass-air-flow-service

Let me know.

Joe

See pic below.

Numbers.

This is after the car got warm.

Hi,

The trims are all over the place. In the second set of pics (warm) the STFT is okay, but the LTFT is indicating a rich mixture. Have you tried cleaning the MAF or servicing the TB?

Also, in the first pics, was that when the engine was first started cold? I noticed the ECT indicates 122 degrees, and the system is running in a closed loop. The +38% STFT is extreme. That indicates the ECM is dumping fuel due to a lean mixture, which is the opposite of what I would have expected. With your scan tools, watch oxygen sensor voltages to see where they are.

Here is a link that explains how to test one:

https://www.2carpros.com/articles/how-to-test-an-oxygen-sensor-02-sensor

Try servicing the MAF to see if that changes thing. Also, after you service it, delete the codes prior to starting it. See if they return or if something different comes back.

Let me know.

Joe

The first thing i did was clean the MAF. I removed the throttle, and it was very clean. First set was when car was cold, second when warm. I will send sole o2 numbers.

Let me see how the oxygen sensors are responding. When scanning them, hit the throttle a few times so I can see how they respond.

Take care,

Joe