[aollaku]

Hello Folks,

My car is showing me a few errors on the DME.

12C004
12C204
12C104

All these errors referred to the NOx sensor. I`ve diagnosed the car with ISTA and another diagnostic OBD tool (ThinkCar2), and I have the same error regarding the NOx sensor. The error says that the line of the NOx sensor, Linear and Binary, is disconnected. I don`t know what is referring to as far as both NOX sensors are physically connected, and I don`t see any mechanical damage on the wires or sensor itself. By the way, the engine light is not illuminated, and at the moment, I can`t see any issue with the car when I drive, and it feels ok. I have only one problem in the morning when the car is cold, after turning on the engine, the engine rpm will move up and down for a few seconds, and then it settles. It doesn`t stall, but yes is noticeable in the morning on the rpm, and the car vibrates a bit, but as I said no check engine light or other error codes like lean or rich from the engine. Please suggest what affects the car to throw this code and make the rpm fluctuate in the morning?



Best,

Andi