U0100 means that communication with the Engine Control Module has been lost.
U0101 means that communication with the Transmission Control Module has been lost.
I'd do the following:
- Check the voltage drop from the battery terminal to the chassis ground. Replace battery ground cable if it's more than 0.01 Volt.
- Disconnect the battery, wait awhile and reconnect. Things may have gotten messed up by the low battery and didn't reboot properly.
- Look for signs of mice or squirrels that might have chewed some wiring.
Having these codes in history is not usual. Make sure they are current codes. They can be set during troubleshooting.
U0101 means that communication with the Transmission Control Module has been lost.
I'd do the following:
- Check the voltage drop from the battery terminal to the chassis ground. Replace battery ground cable if it's more than 0.01 Volt.
- Disconnect the battery, wait awhile and reconnect. Things may have gotten messed up by the low battery and didn't reboot properly.
- Look for signs of mice or squirrels that might have chewed some wiring.
Having these codes in history is not usual. Make sure they are current codes. They can be set during troubleshooting.