I have a 2000 Ford Explorer Sport with 100KM on it and just recently the "Check Engine Light" came on. My mechanic pulled the codes and said it was the O2 sensors. It's been a few days since that and my "Check Engine Light" has gone off. Should I still replace the O2 sensors or should I just wait them out until the light comes back on?
Also, I've been quoted about $150 CDN for each sensor, can I get them for cheaper anywhere else?
One more thing, is it wise to just change 2 02 sensors (the faulty ones) or is it advisable to change all 4 at the dame time.
Any help would be greatly appreciated. Thanks!