P1121 SUBARU -

Question

How does the neutral switch affect emissions? I didn't pass the emissions test because of this code. I thought it was mainly to prevent me from starting my car in gear

Answer 1

P1121 Nuetral position switch low input

The purpose of the check engine light is to protect the catalytic, This code that you have affects the idle quality,The ECM strategizes the fuel trim to protect the catalytic,