Discussion
Can someone help confirm my diagnosis?
I have a 2007 2.0 sport. It has started flashing up a p0421 code. So using the toque app I have investigated the lambda sensors. It appears that sensor 1 (pre cat) is not working as there is no voltage showing on the graph. Sensor 2 is responding ok. So if sensor 1 is not showing fluctuation in voltage is it broken? If it is can i replace it with a generic sensor?
Thanks for any help
I have a 2007 2.0 sport. It has started flashing up a p0421 code. So using the toque app I have investigated the lambda sensors. It appears that sensor 1 (pre cat) is not working as there is no voltage showing on the graph. Sensor 2 is responding ok. So if sensor 1 is not showing fluctuation in voltage is it broken? If it is can i replace it with a generic sensor?
Thanks for any help
nickthecynic said:
SmilerFTM said:
The O2 sensors are both in the midpipe, have you had a new manifold without a cat built in fitted?
Smiler - if you're still on here, I'm getting P0421, have changed the sensors and fitted a new manifold without the pre-cat but still getting the EML every 50-70 miles. Is there something I need to know?Gassing Station | Mazda MX5/Roadster/Miata | Top of Page | What's New | My Stuff