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Lost communication faults are common for NOx sensors. Cummins NOx sensors are a microprocessor equipped “Smart Device” that communicates over the J1939 datalink. They have 4 wires going to the NOx sensor module. A 12VDC or 24VDC power & ground, and two J1939 wires. The power and ground wires simply power up the module. The actual signal from the sensor is delivered on the J1939 datalink. A no communications fault says that that particular module quit talking on the datalink. The fault may read erratic data, no communications or “abnormal update rate” which is the preferred Cummins terminology.
routerlogin.ltdI have a 2005 Nissan Altima. I have some issues that I’ve pinpointed to these two sensors but don’t know which one is the culprit nor do I even know the difference between the sensors.
Symptoms:
Difficulty starting up. It will start up everytime but it’s very rough. And I usually have to have my foot on the brake when starting it up.
I have a 2005 Nissan Altima. I have some issues that I’ve pinpointed to these two sensors but don’t know which one is the culprit nor do I even know the difference between the sensors.
Symptoms:
Difficulty starting up. It will start up everytime but it’s very rough. And I usually have to have my foot on the brake when starting it up.
Lost communication faults are common for NOx sensors. Cummins NOx sensors are a microprocessor equipped “Smart Device” that communicates over the J1939 datalink. They have 4 wires going to the NOx sensor module. A 12VDC or 24VDC power & ground, and two J1939 wires. The power and ground wires simply power up the module. The actual signal from the sensor is delivered on the J1939 datalink. A no communications fault says that that particular module quit talking on the datalink. The fault may read erratic data, no communications or “abnormal update rate” which is the preferred Cummins terminology.
