Welcome, never heard back from Shovelshort. His post was from 2022. Please introduce yourself and describe your troubles. We will try to help.
Andy

 

New thread, please.

 

Hello Andy,
While driving the RPM's and speed would suddenly drop. Now it has developed into once the car warms up the automatic door locks start clicking and then RPM's climb quickly like it missed a gear, and the speedometer drops to 0 mph while it's coasting at a high speed. The digital odometer readout will say POWER STR. After a few seconds everything will correct itself and be fine for a few miles and it will start all over. I am getting the following code: UO101, displayed although was never stored (which are all transmission related).

Did find this list of all the ground locations on the car.
https://charm.li/Saturn/2005/ION%20L...Ground%20List/
Will start checking them.

 

Please start a new thread in the Ion section, this will clear your thread from this old thread. I would start at the battery and clean connections. With the battery in the trunk and using the body as a battery cable every connection has to be perfect. The next connection to clean will be the negative between the body and both the engine and the body at the front.
Thanks,
Andy

 

New thread started.