Ryan12345 Posted August 21, 2021 Share Posted August 21, 2021 Hi, I have an Audi A3 1.6 8V (Engine code BSE) which failed the emissions today. After a throttle body clean, it managed to pass but right on the 0.20% CO limit. The lambda and ppm are good. The front O2 sensor is reading 2V and pretty steady, seems rather high. The rear sensor is at a steady 0.7V. Is it likely that the front O2 sensor is faulty or perhaps the cat? Any help much appreciated Quote Link to comment Share on other sites More sharing options...
Steve Q Posted August 24, 2021 Share Posted August 24, 2021 Might be worth doing a diagnostic check to see if the car flags up any fault codes. Would be cheaper to change the o2 sensor first in my opinion. Quote Link to comment Share on other sites More sharing options...
Ryan12345 Posted August 24, 2021 Author Share Posted August 24, 2021 There's no fault code in any system on the car. I'm now wondering if it's a wideband sensor and that 2V is normal? Quote Link to comment Share on other sites More sharing options...
Steve Q Posted August 25, 2021 Share Posted August 25, 2021 Could well be. I wonder if you're a3 ever had the emissions recall from Audi which might be playing up. Quote Link to comment Share on other sites More sharing options...
Ryan12345 Posted August 25, 2021 Author Share Posted August 25, 2021 I checked on the gov website and there are no outstanding recalls, and I believe the emission recall was for diesel only, although I could be wrong Quote Link to comment Share on other sites More sharing options...
Steve Q Posted August 25, 2021 Share Posted August 25, 2021 42 minutes ago, Ryan12345 said: I checked on the gov website and there are no outstanding recalls, and I believe the emission recall was for diesel only, although I could be wrong Correct it was only for diesel. Sorry I naturally assumed you had the 1.6tdi Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.