Hi!

My instrument panel check engine light was "tuned" by the previous user (check engine lamp was connected to the oil pressure lamp), so I put into the car my old instrument panel from my previous car. Now the diagnostic is working and I have a fault code.
39, oxygen sensor 1 voltage too high, both sensors were replaced  1 month ago (because it's a V6, used sensors were build into).
The check engine light is vibrating, so it's not a continious light.Is this normal?What should I check?Ok, I can repalce the sensor 1 again, but this vibrating is strange..