Nox sensor codes - MBWorld.org Forums

Jul 3, 2018 | 12:24 PM

DansGL

Thread Starter

Member

Joined: Nov 2016

Posts: 90

Likes: 9

From: Barrie, On

GL320 / R350

Nox sensor codes

Good afternoon all.
I went to do my emissions test this morning and on the way, the CEL popped on. the codes are: 147600, 147700, 153600, 153800.
I already replaced the downstream sensor 2 years ago. Now both are faulty?
Does anyone know anything about this scenario or do I really need to buy two new NOX sensors? That's big money! Not to mention the difficulty. That job sucks without a lift and a brontosaurus to break the torque.

Thanks in advance
Dan

Jul 3, 2018 | 01:04 PM

DansGL

Thread Starter

Member

Joined: Nov 2016

Posts: 90

Likes: 9

From: Barrie, On

GL320 / R350

How very helpful your response was. Thank you for taking the time to write to me.

Dan

Sep 16, 2018 | 01:31 AM

bluegl350

Junior Member

Joined: Sep 2018

Posts: 30

Likes: 0

GL350

Hi, I’m new to MB but in other brands I have experienced the upstream sensor fail and cause the downstream false failure as it’s reading was out of spec. Changing the upstream corrected both codes. I would try changing the upstream first before doing both.