O2 sensor code wont clear after replacement of new sensor.

retroman · Posted: Wed Sep 01, 2010 11:10 am Post subject:

Hi all. Had a code p0037. Replaced the first sensor before the Cat Con. Conected the battery but engine light and same code cleared for a few minutes but then came back on. Drove the car for a few days but still code and engine light stays on. I also disconnected the second 02 sensor previously and ran the car for a minute so I could determine its code(p0031) Now it also stays on as an error and will not clear even though it had no fault before I disconnected it. Does it take a while for the codes to clear?