Hesitation

Hi,

What you listed, ISO9141 isn't a diagnostic trouble code. Instead, it is a communication protocol. Were there diagnostic trouble codes found? Usually, they will start with the letter P.

As for the hesitation, I have a few questions. When was the last tune-up? Have you checked fuel pressure and for vacuum leaks? Have you checked the air filter to make sure it isn't partially plugged?

Let me know. Also, here is a link that explains how to test for vacuum leaks. Try this and see if anything is found.

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

Let me know.

Joe

Hi,

If fuel pressure is good and you covered the aforementioned items, then it may be a good idea to try servicing the throttle body to see if that takes care of the issue. Here is a link that shows how to do it:

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

Also, can you let me know what the fuel pressure was when checked? And, if your scan tool has live data, let me know what the short-term fuel trims are.

Take care,

Joe