I have a 2016 and the sensor ends are reversed from what you have here. Position 2 has the plug that you disconnected and goes down to the exhaust not the back of the engine.
2014,2015,2016 LML require to regen DPF when NOx sensor(s) replaced according to tech service bulletin. Did u do a DPF regen prior to reset on NOx sensor?
helpful info and direct delivery good stuff. Are those testing values the same for the downstream NOx sensors on the LML's? I've got a '13 that just kicked the Poor Def Quality msg in the DIC, so just trying to gather info on how to test & troubleshoot everything before we dive in.
Great video and information. I had the NOX sensor1 replaced about a year and a half ago and the sensor code pops up high signal. Any idea what this means as far as high signal. Any would be greatly appreciated
Thank you for the video. Also I replaced my nox sensor on a 2015. Duramax reset the code 10 minutes later comes back on. Don’t know what’s going on. Any idea it could be
Hey, thanks for the video, great help.... Can you tell me what Snap-on scanner you're using and if theres a certain module/key i'd need for it,. and can you do the Redundant Fluid Quality Test with it??...its for a GMC 15 LML??
Do you have to do a nox/ecu reset after replacing sensor? With a scan tool? Or maybe disconnecting battery for 15 min? Light came back immediately after replacement and clearing codes, 2013 chevy diesel
Do you have to go in manually and reset the nox sensor it’s self? I just replaced the nox sensor 1 and still have a CEL for it everytine I clear the codes and thought I had a bad one
my check engine light came on and threw a code for sensor 1. I removed the sensor and soaked it in injector cleaner and then sprayed it all out with carburetor cleaner and wiped it down put it back in with anti cease cleared all the codes and the light has stayed off and the truck is running great. I will recommend on the LML spend some money and buy a shock it socket set the only way to do it in my opinion.
I have a 2013 Silverado duramax that just went into reduced 55 mph reduced speed. I did 2 regents. Took 40 minutes each time. Check engine light went out but exhaust symbol still on. Going to next check my NOx error codes and go from there. Thanks
hey man, thanks for this video it really helped me out dianosing the NOx code i had. however, i performed the exact same tests you did, and replaced the sensor. now i have a dtc U029D- loss communication with NOx sensor 1 module. i clear it it come right back. i reset NOx sensor 1 with the scan tool. and it will not go away. all of my wiring is good, i have power and grounds exactly where i had them before. i need some help getting rid of this DTC please.
@@screamindieselltd I did check my connections. All of them were solid. I mean the only thing that makes sense to me in a bad part. Other than the ECU. And I've proven that the ecu is doing what it wants. Yeah in the times we are in, a (new) bad part is all too common. But thanks again!
Have the P11CB code on nox 1. Replaced it with AC Delco new sensor. I reset the computer and reformed the reset on the nox sensor. My pin 2 and 3 read 1.049m ohms with the key on engine off. If i test the same pins with the key off, i get the readings you said. Any idea what would be wrong?
Thanks for the video. I'm getting ( key off) 120.9 ohms on pins 2-3 and 17K ohms on pins 5-6. With key on, 1.05 M on 2-3 and 122 ohms on pins 5-6 so presumably have bad spot in wiring
OEM is always the way to go with stuff like that. Aftermarket parts have been garbage for the past 3-4 years. Old sensor may have got damaged taking it out or something like that and not be working anymore as well.
Thank you for doing this video on NOX sensors for Duramax. Great information.
I have a 2016 and the sensor ends are reversed from what you have here. Position 2 has the plug that you disconnected and goes down to the exhaust not the back of the engine.
2014,2015,2016 LML require to regen DPF when NOx sensor(s) replaced according to tech service bulletin. Did u do a DPF regen prior to reset on NOx sensor?
helpful info and direct delivery good stuff. Are those testing values the same for the downstream NOx sensors on the LML's? I've got a '13 that just kicked the Poor Def Quality msg in the DIC, so just trying to gather info on how to test & troubleshoot everything before we dive in.
Not 100% sure if the values or wiring is the same.
Thank you man! My Duramax just had that code come up today. Just subscribed!
Great video and information. I had the NOX sensor1 replaced about a year and a half ago and the sensor code pops up high signal. Any idea what this means as far as high signal. Any would be greatly appreciated
Sounds like the sensor is bad or a short on the signal wire
If everything checked out with the meter why did the sensor need to be changed?
The truck side checked out good. Not the sensor
Thank you for the video. Also I replaced my nox sensor on a 2015. Duramax reset the code 10 minutes later comes back on. Don’t know what’s going on. Any idea it could be
Will the new sensor reset without using the scanner tool to reset it?
Usually you need to use a scanner.
Hey, thanks for the video, great help.... Can you tell me what Snap-on scanner you're using and if theres a certain module/key i'd need for it,. and can you do the Redundant Fluid Quality Test with it??...its for a GMC 15 LML??
It’s a modus and you don’t need keys for them anymore. And yup you can do all the tests on it.
Do you have to do a nox/ecu reset after replacing sensor? With a scan tool? Or maybe disconnecting battery for 15 min? Light came back immediately after replacement and clearing codes, 2013 chevy diesel
Do you have to go in manually and reset the nox sensor it’s self? I just replaced the nox sensor 1 and still have a CEL for it everytine I clear the codes and thought I had a bad one
Sorry for the late reply. Yes you do have to reset the sensor data
my check engine light came on and threw a code for sensor 1. I removed the sensor and soaked it in injector cleaner and then sprayed it all out with carburetor cleaner and wiped it down put it back in with anti cease cleared all the codes and the light has stayed off and the truck is running great. I will recommend on the LML spend some money and buy a shock it socket set the only way to do it in my opinion.
Muchas Grasias por compartir tus conocimientos !!!
Glad to help!
Do you need to do a regen on that sensor?
I have a 2015 that has a nox sensor code and is down to 55 mph can I just change sensor and code will go away it self or do I need the scan tool
You will need to clear the code and reset the nox sensor system for the one you have changed for that you need a scan tool.
Can you provide the NOX sensors part numbers? I need to change mine also. Thanks.
I have a 2013 Silverado duramax that just went into reduced 55 mph reduced speed. I did 2 regents. Took 40 minutes each time. Check engine light went out but exhaust symbol still on. Going to next check my NOx error codes and go from there. Thanks
Can any scan tool clear it once I have changed the box sensor?
hey man, thanks for this video it really helped me out dianosing the NOx code i had. however, i performed the exact same tests you did, and replaced the sensor. now i have a dtc U029D- loss communication with NOx sensor 1 module. i clear it it come right back. i reset NOx sensor 1 with the scan tool. and it will not go away. all of my wiring is good, i have power and grounds exactly where i had them before. i need some help getting rid of this DTC please.
Possibly defective sensor. Even dealer sensors cant 100% be trusted. Or check your connectors
@@screamindieselltd I did check my connections. All of them were solid. I mean the only thing that makes sense to me in a bad part. Other than the ECU. And I've proven that the ecu is doing what it wants. Yeah in the times we are in, a (new) bad part is all too common. But thanks again!
@@screamindieselltd and I jus replaced that NOx sensor 1 and I still have a no comm's issue...
Have the P11CB code on nox 1. Replaced it with AC Delco new sensor. I reset the computer and reformed the reset on the nox sensor. My pin 2 and 3 read 1.049m ohms with the key on engine off. If i test the same pins with the key off, i get the readings you said. Any idea what would be wrong?
Did you ever get this figured out?
I’m getting the same readings with key on/key off which he does say to do but Identifix doesn’t say to do that.
Thanks for the video. I'm getting ( key off) 120.9 ohms on pins 2-3 and 17K ohms on pins 5-6. With key on, 1.05 M on 2-3 and 122 ohms on pins 5-6 so presumably have bad spot in wiring
This is exactly what i have. Did this turn out to be bad wiring spot? Cause ive never known can circuits to be tested with key on
Well done video to the point and informative. Thank you.
Thanks! Glad it could help you.
I have 45ohms between 2&3 and 16ohms between 5&6. no voltage going to the plug. key is on . WTH?
I have opens with the key on. Ive never known can circuits to be tested with key on and getting 120 ohms but im a technician for heavy duty stuff.
I just replaced bank 1 sensor and now it shows communication loss
OEM part or aftermarket?
@@screamindieselltd I don’t think it’s OEM
I am going to try an old sensor that I kept and see if that one loses communication
@@screamindieselltd I tried to clear the code and it wouldn’t clear
OEM is always the way to go with stuff like that. Aftermarket parts have been garbage for the past 3-4 years. Old sensor may have got damaged taking it out or something like that and not be working anymore as well.
Copy an image of the wire diagram next time please bro