Skyline check engine light NOx sensor

I had something similar with my Skyline. Check the NOx sensor itself. They fail pretty often, especially with higher mileage. Did your air-fuel ratio change before the check engine light?

Thanks for the quick reply. I didn't notice any change in the air-fuel ratio before the light. Can you tell me more about what happened with yours? Was the NOx sensor definitely the problem, and how did you fix it?

Yeah, it was the NOx sensor for me. With your symptoms, the error codes, and the exhaust leak, it's probably that. I'd get it checked at a good shop. Cost me about 95€ to fix.

Thanks, that's helpful. Sounds like the NOx sensor is the issue. I'll take it to a shop to get it checked out. Appreciate you sharing your experience and the cost. It helps a lot.