[Azerlazer26]

Hi everyone! I got my car checked out for 3 engine codes and don’t know what any of them mean! If you don’t mind helping me figure out what each code is for it’ll be very appreciated!
Here are the codes:
P10E2 P2101 U0101

[Azerlazer26]

I should note. The car is currently in storage. I had to move the car closer to the wall since I was getting a new window installed and needed more space to open my drivers door. While moving the car, I noticed that my check engine light stayed on. Also the car was on accessory mode while undergoing diagnostics.

[CrazyCatGuy]

P10E2 = Ignition On/Start Circuit Source Bypass Relay Control Circuit Low Voltage. Control Circuit = Short to Ground — For greater than 1 s.

P2101 Throttle Actuator Control module circuit fault

U0101 Lost communication with Trans. control module.

Found all of these using Google. I assume they are accurate as the info was from this website.

[Azerlazer26]

Originally Posted by CrazyCatGuy

P10E2 = Ignition On/Start Circuit Source Bypass Relay Control Circuit Low Voltage. Control Circuit = Short to Ground — For greater than 1 s.

P2101 Throttle Actuator Control module circuit fault

U0101 Lost communication with Trans. control module.

Found all of these using Google. I assume they are accurate as the info was from this website.

Do you have any idea on what would trigger these codes?

[Keloid]

I got a similar trifecta of codes twice, all related to depleted battery (low voltage causing problems when vehicle systems were being checked). I would look into this first... are you using battery tender ? Is it working right ?

[Azerlazer26]

Originally Posted by Keloid

I got a similar trifecta of codes twice, all related to depleted battery (low voltage causing problems when vehicle systems were being checked). I would look into this first... are you using battery tender ? Is it working right ?

Have my car hooked up to a battery tender. I have both positive and negative hooked up to the front terminals under my hood.

[Wolvie70]

Originally Posted by CrazyCatGuy

P10E2 = Ignition On/Start Circuit Source Bypass Relay Control Circuit Low Voltage. Control Circuit = Short to Ground — For greater than 1 s.

P2101 Throttle Actuator Control module circuit fault

U0101 Lost communication with Trans. control module.

Found all of these using Google. I assume they are accurate as the info was from this website.

Google! Who would have thought.

[Gunkk]

Originally Posted by Azerlazer26

Do you have any idea on what would trigger these codes?

This is all from low battery voltage. The various modules in the car can go nuts and randomly throw bogus codes when they drop below a certain voltage. I got a P10E2 and a random TCU code once when the keyless entry glitched and left the ignition in "key on" mode and the battery died (dark dash, doors locked, fob in my pocket outside the car, etc.). Other common ones are "service stabilitrack" and rear diff errors for those with the e-diff.

I jumped the car, cleared the codes with a $15 OBD2 reader and Torque app and haven't looked back.

[ctrlz]

Originally Posted by Gunkk

This is all from low battery voltage.

I agree.
The pattern doesn't really make sense otherwise.

From all the threads noting battery problems with storage, I also agree a code scanner is a wise investment.