Advice on cleaning lambda (O2) sensors
Discussion
Hi all, my car struggled to get through the emissions test on a recent MOT and the tester suggested cleaning the Lambda sensors. Im just wondering what the best way is to go about cleaning them, a quick google gave numerous ideas one of the most popular seemed to be cutting a lemon in half and sticking the sensor into it! Has anyone tried this method with success or has any other suggestions?
E-bmw said:
Buy replacements.
^^ That. But it's possible to test them to see whether they're getting blocked. I guess you're talking about narrow band sensors, in which case you should see the signal cycling between rich and lean about once a second while the engine is in closed loop mode, if everything else in the engine management system is in good order. The main symptom of a dirty sensor is that it cycles more slowly.Gassing Station | Engines & Drivetrain | Top of Page | What's New | My Stuff