P0511 - Idle Air Control (IAC) Circuit Malfunction
P1633 - Keep Alive Power Voltage Too Low
The P0511 can be triggered due to a faulty wiring, short in the circuit. It can also be due to a PCM issue.
The P1633 is another issue that could be caused by wiring issues.
To figure out the cause you will have to take a deep dive and look through all the possibilities.
I have attached the trouble shooting guide for both of those codes below.
Follow these steps as it can help you determine the issue.
You will need to use a multimeter to complete these steps.
Please let me know if you have any questions.
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Friday, January 21st, 2022 AT 9:12 PM