I have a 94 civic hatch cx with an obd1 gsr swap installed. When I first started the engine the check engine light was on. I checked the code, and I was getting 41. I wired up my o2 sensor and now the light is off. However, when I try to check codes, 41 still appears. Is that just in memory? Because my check engine light stays off now. Is there a way to erase that? Thanks!