OK, questions for our RCM experts; I had no issues with my RCM, but decided to replace it with one from DJ, as a proactive measure to avoid a potential outage down the road. He sent me his RCM, but after I installed it, I got an "check engine" light. The code is P0410. I put mine back, and the light went away. Now I have the light on again with my original RCM. Any thoughts?