Hey guys and gals!, I’ve re-entered the forums. I bought a used 2015 Duramax in 18 and lifted it and put a mild speedo hyper Tech tuner on it. Still has all the Government’s emissions jewels on it 😑
They might fall off.
Long story short, I month ago I started getting a message about low quality DEF. I went straight to the nearest Walmart and put it in blue def platinum.
A few miles of highway driving and it went away.
couple weeks went by and I got a bunch of codes about water in fuel,(which there was none because I checked it after I drained it)
I got everything from ECM codes to PCM codes…
Probably from me temporarily unplugging the def and injector and exhaust temperature sensors.
I fully drained the def tank, Visually inspected the injector in and cleaned the very minor crystallization, and put half peak blue DEF and then topped off with peak blue def platinum.
My speed is limited to 65 about to be 55 until 4mph.
I’ve checked all my fuses and cleared codes and I’m still just getting poor DEF quality.
I have read and thought about replacing the downstream and upstream nox sensors, but that’s a pain in the butt in about four to $600 if I do it myself and what if it still doesn’t fix the issue?
I was getting a P049B or p249b along with fuel in water sensor and different nox codes high input detected.
Even got some ECM and PCM codes that could’ve been from unplugging a bunch of sensors.
Anyone having these issues and finding a solution? I can’t afford to spend thousands on repairs.
If I take it to the wrong place they might try to sock it to me.
I can do a lot of repairs myself but I don’t want to just be replacing sensors and parts.
Anyone have any advice? Please help😢
Thank you so much!
They might fall off.
Long story short, I month ago I started getting a message about low quality DEF. I went straight to the nearest Walmart and put it in blue def platinum.
A few miles of highway driving and it went away.
couple weeks went by and I got a bunch of codes about water in fuel,(which there was none because I checked it after I drained it)
I got everything from ECM codes to PCM codes…
Probably from me temporarily unplugging the def and injector and exhaust temperature sensors.
I fully drained the def tank, Visually inspected the injector in and cleaned the very minor crystallization, and put half peak blue DEF and then topped off with peak blue def platinum.
My speed is limited to 65 about to be 55 until 4mph.
I’ve checked all my fuses and cleared codes and I’m still just getting poor DEF quality.
I have read and thought about replacing the downstream and upstream nox sensors, but that’s a pain in the butt in about four to $600 if I do it myself and what if it still doesn’t fix the issue?
I was getting a P049B or p249b along with fuel in water sensor and different nox codes high input detected.
Even got some ECM and PCM codes that could’ve been from unplugging a bunch of sensors.
Anyone having these issues and finding a solution? I can’t afford to spend thousands on repairs.
If I take it to the wrong place they might try to sock it to me.
I can do a lot of repairs myself but I don’t want to just be replacing sensors and parts.
Anyone have any advice? Please help😢
Thank you so much!
