Nox sensor

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Check engine light came on my stock 2014 2500. It has 77,000 miles and seems to be running normal without any issues. I had it scanned at advance auto and it showed “ invalid data received from NOx sensor B”. I had issues with dim headlights, and a fast blinking passenger blinker and I’m wondering if this is not another electrical issue. Any ideas?

 

[nlambert182]

Nox sensor B is the rear most SCR sensor behind the DPF. It has been known to fail.

There have been some dealerships who have had to delete that sensor because the issue recurs regardless of what has been fixed.

Don't know if that's your issue though.

 

[robertpattison873]

Hi! I am new here. I Suggest some issues with your NOx sensor check engine light is activated due to NOx sensor B malfunction. The malfunctioning NOx sensor will impact emissions performance and fuel efficiency levels gradually even if the vehicle continues to operate smoothly. The electrical problem could be responsible for both your dim headlights and rapid blinking passenger blinker since you also experienced similar electrical faults.
Perform an inspection of the wiring and check both electrical connections to prevent corrosion and loose connections from occurring. The NOx sensor error requires sensor replacement or ECU software update if it continues. A dealership or mechanic professional diagnostic scan would give you more comprehensive examination results.