it varies - Tried it on a 04 taurus that broke a valve spring. Wiped the convertor on that side. Fixed the spring and scrubbed the convertor. Switch rates looked great. Released the vehicle and it came back 1000 miles later. Had to replace the convertor on that one. Vehicle only had 15k on it so it was all warranty. Also had a 96 explorer with 250k on it and after a scrub it's worked great. been about 20,000 miles so far... When my vehicles pop this code, I'll do the same to mine. Cheap fix.
