How to fix check engine light? 4lo blinking

My tundra is having a check engine and when the check engine light is on the 4lo light also blinks. Now if I erase the code the 4lo light disappears like it should but then my 4lo works but while it’s blinking it doesn’t because this has to do with the check engine light.

 

If you can erase codes then presumably you also have the ability to read those codes. My question would be what codes is it throwing? Sort out the problem from the source and it shouldn't keep putting on the management light.

 

It’s the transmission code and I just unplugged my battery to erase the code but it keeps coming back with same code and blinking 4lo

 

Max Nordau's observation seems apt. Perhaps you should try doing something else?