Hello,
The code P1811 typically gets triggered when there is a shifting issue. Typically delay in shifting.
Depending on what is causing this issue, it could be any number of components or sensors.
It could be due to not having sufficient fluid pressure within the transmission, or faulty valve body or shift solenoid.
The best course of action would be to take a deeper dive in diagnosing the issue. That can determine if a transmission overhaul or replacement is necessary.
https://www.2carpros.com/articles/automatic-transmission-problems
As for if it will be worth repairing, it is really a subjective question and depends completely on you.
I have attached the diagnostics steps for code P1811 below for your reference.
Please let me know if you have any questions.
Thank you.
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Wednesday, January 5th, 2022 AT 11:42 AM