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patriciamiller1

Nissan Serena NOx Sensor Exhaust Leak

Hi, I have a 2019 Nissan Serena with a gasoline engine. The check engine light is on and the error memory shows a NOx sensor failure. I also noticed exhaust leaking. I checked the sensor connections, but everything seems ok. Any ideas?

4 comment(s)

noahmiller82

Hey! I had something similar with my Serena. Drove me nuts! Was the exhaust leak noticeable, like super loud or just a whiff? I'm thinking maybe a dodgy sensor, but a leak could mess things up too. Does it smell different than usual?

patriciamiller1 (Author)

The leak isn't too loud, just a faint smell. You had the same NOx sensor issue and exhaust leak?

noahmiller82

Yep, same NOx sensor and exhaust smell! Turned out to be a faulty connection, just like the mechanic said it could be. Honestly, save yourself the headache and get it checked by a workshop, they'll sort it out quick.

patriciamiller1 (Author)

Thanks for the advice! Took it to the workshop, and you were right - the cable connection was defective. Cost me 95€ to fix. Appreciate the help!

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