Chevrolet Cruze Forums banner

Diesel Emissions Sensor Number and Location

86643 Views 50 Replies 19 Participants Last post by  NH_Diesel
3
I'm creating this thread as a means of compiling a one-stop reference for defining, locating, and identifying Diesel Emissions Sensors for the Cruze, including part numbers and links to How To threads for repair/replacement instructions. Additional information is welcomed, as well as corrections to the material here. I will update the OP continuously with newly-discovered or corrected information.

O2 Sensor #1 (Lambda - pre-DPF) - Located at the entrance to the DPF unit, below NOX#1 and EGT#1 sensors. Part#: 12644786

Auto part Pipe Fuel line Vehicle


Exhaust Gas Temperature Sensor #1 (pre-DPF) - Next to (right of) NOX#1 Sensor, between Turbo and DPF. Original Part#: 55583113, New Part#: 55598259

Exhaust Gas Temperature Sensor #2 (mid-DPF) - Inserts onto front of the DPF unit at the border between the Oxidation Catalyst stage and the Particulate Filter stage. Part#: 55581035

Exhaust Gas Temperature Sensor #3
(pre-SCR) - upstream of DEF injector Part#: 55581034

Auto part Engine Vehicle Car City car


EGR Temperature Sensor - Located on Exhaust Manifold at exit of cylinder 4. Part#: 12634536

Differential Pressure Sensor (DPF Pressure Sensor) - A single sensor module that inserts at two points (pre-DPF and post-DPF) and measures the difference in pressure between the two points to identify when a re-gen of the DPF is necessary. Part#: 55570092

NOX Sensor #1 ("Forward," pre-DPF, or pre-SCR) - First Sensor in the exhaust system, next to (left of) O2 Sensor, between Turbo and DPF. Measures Nitrous Oxide in exhaust in order to regulate DEF injection, and monitors SCR performance in conjunction with NOX Sensor #2. (The photo is currently mis-labeled, I will update as soon as I have a chance.) Original Part#: 12641556, New Part#: 12662658

NOX Sensor #2 ("Rear" or "post-" SCR) - Second-last sensor in the exhaust system; located immediately upstream of the Particulate Matter Sensor (on the right of it if looking from the passenger side of the vehicle); inserts on exhaust pipe just forward of the rear wheels, along the mid-line of the vehicle, across from the fuel filter. Module end of the sensor can be found to the rear of the Fuel Filter (on your right if you slide under the car from the passenger side). Measures Nitrous Oxide in exhaust after DEF injection to monitor performance of SCR. For a How To article on replacing this part, see the article on replacing the Particulate Matter Sensor, found at http://www.cruzetalk.com/forum/169-...matter-sensor-exhaust-particulate-sensor.html. Follow the same procedure outlined for the Particulate Matter Sensor, but replace the other sensor of the pair. Original Part#: 12641557, New Part#: 12662659

Footwear Bumper Auto part Automotive lighting Shoe


Particulate Matter Sensor (a.k.a. Exhaust Particulate Sensor) - Last sensor in the exhaust system; located immediately after NOX Sensor #2 (on the left of it if looking from the passenger side of the vehicle); inserts on exhaust pipe just forward of the rear wheels, along the midline of the vehicle, across from the fuel filter. A wire runs from this sensor to a control module that is mounted next to the fuel filter. The module and sensor are replaced together as an assembly. How To available at: http://www.cruzetalk.com/forum/169-...matter-sensor-exhaust-particulate-sensor.html Original Part#: 12655962, New Part#: 12661098
See less See more
  • Like
Reactions: 5
1 - 20 of 51 Posts
Rev ...... just one o2 sensor an its pre DPF an it has 3 exhaust temp sensors, top an bottom of dpf an pre def injector in exhaust pipe.
Great idea for a post!
Rev ...... just one o2 sensor an its pre DPF an it has 3 exhaust temp sensors, top an bottom of dpf an pre def injector in exhaust pipe.
updated original post to reflect this
I'm guessing you've seen this? It's not exactly straightforward:

EGR SYSTEM for 2014 Chevrolet Cruze (Diesel)
I'm guessing you've seen this? It's not exactly straightforward:

EGR SYSTEM for 2014 Chevrolet Cruze (Diesel)
Yeah. That's one of the three diagrams across which the emissions components are spread. That particular diagram drove me crazy when I was doing my Particulate Matter Sensor search, because that sensor, and a few others do not show up on any parts diagram at all. Kind of infuriating when trying to work on the vehicles. Hopefully the service/repair manual has better diagrams, but by the time I get my hands on one at a price I can afford, we may have already put all the pieces together ourselves, making it unnecessary.

You'd think they would just create a diagram of the exhaust stream from the manifold through the turn-down and diagram all of the sensors in the locations they're installed. Instead, they have them floating out in thin air with no indication where the sensor you're seeing inserts or where the sensor you know the location of on your car is in the diagram.
I seem to remember somebody posting a diagram on here that listed all the sensors, but I can't find it.
This is a great picture

Attachments

See less See more
  • Like
Reactions: 4
This is a great picture
That's a good diagram. Even though it doesn't have the various twists and turns of the pipe, and some of the locations are slightly off (NOX2, for example, should be on the other side of the pipe), it at least provides the order they come in the stream. I see a few naming differences and location details that vary from what I have compiled above, so when I get a chance, I'll have to edit the original post to reflect those corrections. Thanks for posting the diagram!
This is a great picture
That's the one I was talking about
I got the picture of sensors in the front of the engine bay today. (Hopefully I can get the remaining under-car sensors next time I have it lifted up.)

Here's my first shot at labeling this photo. It's difficult to translate from the diagram above to the real-life photo, so look it over and see if you agree with my labeling or if I need to make some revisions.

Auto part Pipe Fuel line Vehicle
See less See more
  • Like
Reactions: 2
OP updated with 2 photos and revised descriptions
  • Like
Reactions: 1
I love this thread, a great resource!
  • Like
Reactions: 3
Found out while looking under the hood today and looking up part numbers on some of the sensor modules that I have the labels NOX1 and O2 reversed in my under-hood photo. When I have a chance, I will re-label the photo to correct the mistake. I also discovered the location of the DPF Pressure Sensor and lines (hidden in plain sight), so I plan to add a photo and description of its location, along with part numbers for many of these sensors, which I've discovered in my search for a decent price on NOX2 for my Cruze, when I do that as well.

In addition, I discovered a new sensor while I had the engine cover off. There is a sensor that looks a lot like the EGT sensors which appears to be inserted directly to the exhaust manifold (pre-turbo, near the front-driver's side corner of the engine). I wasn't previously aware that this sensor existed, and it isn't listed in the diagrams that I can recall, so it looks like I'll be trying to research what this sensor is/does.
  • Like
Reactions: 3
I had time today to swap the location descriptions for O2 and NOX#1. I also added all of the part numbers, including both the original part number (for those of us with early 2014 builds) and the updated part numbers (original to 2015 and later 2014 built vehicles and used as replacement parts for those of us with older builds).

My preliminary conclusion about the newly-discovered sensor is that it is the EGR Temp Sensor. I have included that definition, but continue to research to confirm this conclusion and would welcome input from others about this sensor and its location/definition.

I still need to update the labels on the photo of the DPF area (and add photos of EGT#3, EGR Temp, and the Differential Pressure Sensor). Hope to do that on a rainy day when I have time to dig into the photo editing software or once I finish all my fall outdoor work that is hanging over my head.
Completed major update of the OP this afternoon: Additional photos, corrected labels, finished adding part numbers (except for EGT#3), updated some info, and included note that the repair How-to for NOX#2 is identical to the Particulate Matter Sensor, except that you replace the neighboring sensor and trace it to a module on the other side of the fuel filter.
You may need to re-look at the Differential Pressure Sensor location and hoses. It appears the hose labeled "pre DPF line" actually routes to the turbo variable-vane actuator and the hose labeled "post DPF line" goes to some sort of vacuum reservoir on the front of the engine.



-Brad
Thanks for this. Very educational for those still learning. Now I'm wondering what have I got myself into....
  • Like
Reactions: 1
You may need to re-look at the Differential Pressure Sensor location and hoses. It appears the hose labeled "pre DPF line" actually routes to the turbo variable-vane actuator and the hose labeled "post DPF line" goes to some sort of vacuum reservoir on the front of the engine.



-Brad
You're right. I based that info on a too-hasty look at the parts and I crossed up the paths of the lines with those of similar neighboring hoses when I was tracing their path. I re-examined yesterday and found out that the part number traces back to the turbo actuator. I'll edit the OP to remove that erroneous info. Looks like it's time for me to start researching that DPS again to figure out where it is.
  • Like
Reactions: 2
I am new to having a diesel. Any idea what the various sensors and DPF cost if out of warranty? What a great thread, great work Rev. Thanks so much:eusa_clap:
1 - 20 of 51 Posts
Top