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
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Tuesday, December 21st, 2021 AT 6:58 PM