Transmission stuck in third gear and check engine light is on

I have the vehicle listed above it is the 6 Wagon S. I performed transmission filter and transmission fluid replacement service, aftermarket headers installed and replacing oil pressure sensor. After all of the work was completed, my car would not shift into any other gear as selected with the exception of reverse, neutral and third gear.
The manual gear selection did nothing to move vehicle out of third gear. The check engine light would lit up as soon as the engine is started even after the CEL have been erased and cleared many times before the start up.

Mass airflow sensor and camshaft position sensor were replaced with the same test result, original mass airflow sensor was installed back for testing and still getting the same check engine code and still stuck in third gear with reverse gear being hard shifting/aggressive shifting into reverse.
These are CEL codes below. Battery voltage reading at the battery terminal after start up 14.30 volts.

1. Mass airflow sensor low input.
2. Camshaft position sensor left and right side.