O2 sensor clean up Posted by mftp on May 24, 2013 Posted in: Uncategorized. Tagged: lambda, O2, oxygen. Leave a comment Due to problems with the sensor I decided to clean it up with 20 % lime acid. It turned out perfectly. Share this:TwitterFacebookLike Loading... Related Posts navigation ← Gearbox additive Mercedes W202 2.0 KOMPRESSOR TUNING →