[Danny5]

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#: 55581034

Exhaust Gas Temperature Sensor #3 (pre-SCR) - upstream of DEF injector Part#: 55581035

So I think the #2 and the #3 sensor part numbers are wrong (switched). I had gone off this thread:

http://www.cruzetalk.com/forum/201-...en1-diesel-technical-discussion/155961-part-number-exhaust-temp-sensor-2-a.html

but after replacing sensor #2 with 55581035, I am now getting (a week later) a P20E4 code. So coming back this thread, thinking I might need sensor #3.

Now, if you look up 55581035 on Amazon it shows a curved sensor, like what was in position #2 of your picture. Part 55581034 shows a straight sensor, like in the downstream position 3. I double checked this against GMPartsDirect.

Description of 55581034: CRUZE, CRUZE LIMITED; 2.0L; DOWNSTREAM; EXHAUST TEMP SENSOR; POSITION 3
Description of 55581035: CRUZE, CRUZE LIMITED; 2.0L; DOWNSTREAM; EXHAUST TEMP SENSOR; POSITION 2

Can anyone verify this? I would hate to think I put the wrong sensor in position #2 in my car. However, it was an exact match of what I took out...

 

[Danny5]

I've been trying to find this answer myself since it was raised in the other thread. The part numbers in my OP here are based on the descriptions given in the RockAuto.com catalog at the time it was written. I know that another user has seen the numbers used as you describe above in a work order written by the dealer who replaced his sensor. As more evidence comes in and the part becomes more readily available, it is looking like I might need to revise the OP to reverse those part numbers. The difficulty with these EGT sensors is that I can't find the part number imprinted anywhere on the part itself, which is the method I used for identifying many of the other sensors, leaving us to rely on secondary evidence to discern the correct part numbers.

Well, you're in luck! I still have the sensor I removed from position #2 on my shelf, so I looked on it to find a part number. Lo and behold!!!

 

[Danny5]

A cautionary tale

So I've been getting the dreaded EGT codes lately. About 2 months ago, I replaced EGT#2.

However, I was still getting some intermittent codes, and I naturally assumed EGT#3 also had to be replaced. This sensor gave me some troubles, so let's get you some helpful tips.

First, the #3 sensor is only 6" forward of the DEF injector, and on top of the pipe. You can almost see it by looking down the back of the engine bay. The sensor wire is clipped to another wire, and then has it's own clip that fits around a small pipe on the back of the engine. Access from under the car should be done from the Passenger wheel area. I removed the wheel for more clearance for my fat ass.

Here is the tricky part:

It's clipped in an open connector on the back of the engine towards the top. A little wiggle will pull it out of the clip so you can access the connection better. Pull up on the red lock clip, and separate the connector. Note orientation! There is a mark on the egt plug, so I wanted to make sure the same mark went the same direction when putting it back together.

Now a 17mm will fit on the sensor itself, but when mine broke loose, it was in the direction of the DEF injector, and I broke it. I tried to MacGyver it back together, but the def line is high pressure...

Breaking the def injector is a $450 repair at your local dealer.

My suggestion is to save money by buying EGT#3, but also SAVE money by letting the dealer replace it.

 

[Danny5]

I changed mine from the top of the engine compartment with a couple of rachet extensions. That way the only thing you might break is the ol knuckles

Interested to hear how you did this. None of my ratchets would fit over a sensor with a 3' wire coming off of it!