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Common Issues and Fixes for 2014-2015 Cruze Diesel

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All,

I finally got around to putting this together. Please post any corrections/additions below. I am going for common issues here, not things that just pop up once randomly.

Symptoms: Could be a DEF Quality poor message (P20EE) but usually a code (P21DD) for the DEF heater. Sometimes these messages are related to each other. The P21DD is more definitive.
Solution - DEF Tank Reservoir Heater – Replacement part number 23377881 (replaces 22978800). Update: In my case, it gave the DEF quality poor message but the CEL never actually lit up. You can also get a P20B9 code, but that usually only comes after one of the other codes or the def quality poor message have already reared their heads. There is an extended warranty on this 10years 120K miles. Note that it can take up to 100 miles after replacement for the error to clear!

Symptom: P0133 code (O2 sensor bank one slow response)
Solution: Most commonly there is a fuel trim update that can be done to prevent the sensor from getting sooted up in the first place. Sometimes it's not necessary to replace the sensor. You can get away with just cleaning it. Could also be caused by a few other things. Some have reported that issues with the EGR or EGR plate could cause this. Others have reported that loose intake clamps could cause this. (See post below for more details).

Symptom: Pop sound followed by loss of power, rough running, strong smell of diesel fumes, visible smoke. Check engine light may or may not appear. Note: So far this has only happened on cars with over 150K miles.
Solution: Most likely your intercooler pipe has cracked. Top, right, rear of the engine as you facing the car. Part number is 95472182 for the intercooler pipe. Some have reported this also causing damage to other related components, but only with extended driving in the broken condition.

Symptom: P20E4 code (Exhaust Gas Temperature Sensor 2/3 Correlation Bank 1)
Solution: Further diagnosis must be done to determine if it’s sensor number 2 or number 3 causing the issue. EGT3 Part number is 55581034 and EGT2 is 55581035

Symptom: Your car displays a message that says “DPF Full Keep Driving” (or something like that) followed by “Engine Power Reduced”. Most likely you have interrupted a “pre-regen”.
Solution: Unfortunately, you will need to go to the dealer for a manual DPF regen. See this post for how to prevent: http://www.cruzetalk.com/forum/201-...sel-owners-read-can-save-you-trip-dealer.html

Symptom: P11D7 NOx Sensor 2 Performance - Sensing Element Status Signal
Solution: Replacement of the NOx sensor, but sometimes the code will clear itself. This can also be caused by the exhaust flange bolt mentioned below. Some good info in post 46 here: http://www.cruzetalk.com/forum/201-gen1-diesel-technical-discussion/36393-p11d7-code-5.html

Symptom: Any number of random codes
Solution: The exhaust flange bolts under the middle of the car are prone to corrosion and snapping off. Getting these replaced along with the gasket as a preventative measure is a good idea, mainly if you live in a northern climate where salt is used on the roads. Procedure to fix is here: http://www.cruzetalk.com/forum/169-...ary/172753-how-replace-exhaust-studs-scr.html

Symptom: Any number of random codes
Solution: A common issue is that the intake hose clamps work themselves loose over time (or come loose from the factory) allowing for unmetered air. Procedure to check is here: http://www.cruzetalk.com/forum/169-...ry/150146-how-check-diesel-intake-clamps.html

Symptom: Failure to start, any number of weird electrical gremlins, failure of transmission to shift out of 1st gear
Solution: Most likely, it's the battery. The factory battery only seems to last about 2 years in these cars. Another thing, if you've not had your negative battery cable replaced, do so. It's an extended warranty item up to 10 years, 120K miles. More about the cable is here: http://www.cruzetalk.com/forum/25-g...al-coverage-14311-negative-battery-cable.html

Symptom: P11DC after the NOx Sensor 1 and reprogram emissions recall. The theory is that the parameters set in the ECU reprogramming are too tight and throw a P11DC code which isn't really a valid code. This can also cause DEF Quality Poor message. More info here: http://www.cruzetalk.com/forum/64-g...ecall-poll-p11dc-please-post-only-thread.html
Update on the above - the recall has been recalled. More info here:
http://www.cruzetalk.com/forum/64-g...on-1-sensor-replacement-recall-suspended.html
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I purchased our 2014 Cruze diesel brand new from a local dealership. Everything was great until the vehicle O2 sensor recall/recalibration was done with under 10k on the vehicle. Since then, my mileage dropped significantly(averaging between 18-20mpg, with full tank range consistently indicating less than 350 miles). I also experienced a significant loss in power and driveability, with the vehicle lagging upon acceleration, and intermittent shifting issues. I have had it into the dealership several times, and they have repeatedly told me they can find nothing wrong. They also told me the poor mileage sometimes just happens! I am thoroughly frustrated with the situation, as the vehicle still has under 50k on it, and I really like(d) the power and mileage the vehicle had when I first bought it. Any feedback or suggestions on a remedy are greatly appreciated, and if I can’t find an answer I’m likely going to use it as a trade in on another vehicle before I start having costly repair bills to keep it on the road!
 

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Hopefully you have documentation of your visits. Have you directly contacted GM Support with complaints? I don't drop below 30MPG even when I am stop and go around town.
 

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I purchased a new 2014 CTD in November 2013 and within a few days began to receive numerous codes regarding emissions problems including DEF tank, fluid quality, tank heater, bad sensors etc. After numerous trips to the dealer requiring 34 days and numerous parts replacement the car continued to throw codes and had poor economy.

I finally found this forum and printed a GM technical instruction for updating the emissions software. I provided the software instructions to the dealer, who reflashed the computer. This fixed all the problems and improved fuel economy about 20%. I've had no additional problems with the car and love it.

The dealer employees seemed oblivious to the difference between a diesel and gas Cruze. For example, the salesman who sold the car wasn't familiar with the glow plug ignition and the mechanics always deflated the special diesel tires to the lower gas inflation instruction. I believe that there was never anything wrong with the parts that were replaced. Why would so many faulty parts be installed on a brand new vehicle emission system? I estimate that the unnecessary warranty repairs would have cost about $5,000.

I now place a card on the dash explaining that the car is a diesel when it is serviced. This prevents damage from clueless technicians caused by inadequate GM training.
 

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Hey guys, I have a 2014 Cruze Diesel with 109k. Having Poor quality exhaust fluid issues. Already had it too the dealership 2 times, they claimed they replace the tank, heater and the pump. A week later started getting the same message again. Now all I get from ppl is that the DEF system is junk get rid of it and buy a new car. I ve also been told to just bypass the system, but I don't have a clue what to do there. I love this car, I don't want to get rid of it. Little advice goes along ways.....
 

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Hey guys, I have a 2014 Cruze Diesel with 109k. Having Poor quality exhaust fluid issues. Already had it too the dealership 2 times, they claimed they replace the tank, heater and the pump. A week later started getting the same message again. Now all I get from ppl is that the DEF system is junk get rid of it and buy a new car. I ve also been told to just bypass the system, but I don't have a clue what to do there. I love this car, I don't want to get rid of it. Little advice goes along ways.....
I don't want to speak for @revjpeterson but is this the NOX sensor #2 issue?
 

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I don't want to speak for @revjpeterson but is this the NOX sensor #2 issue?
NOX2 would be the most likely cause. Could also be a problem with the DEF injector, clogged DEF line, or some other more obscure causes.

Sounds like the dealership either just threw parts at it and didn't properly follow diagnostic procedure, or they skipped doing the computer reset after replacing the parts.

Could either play the odds and throw a NOX2 on it, or find someone who will fully go through the diagnostic steps first.
 

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Hey guys, I have a 2014 Cruze Diesel with 109k. Having Poor quality exhaust fluid issues. Already had it too the dealership 2 times, they claimed they replace the tank, heater and the pump. A week later started getting the same message again. Now all I get from ppl is that the DEF system is junk get rid of it and buy a new car. I ve also been told to just bypass the system, but I don't have a clue what to do there. I love this car, I don't want to get rid of it. Little advice goes along ways.....
I hope you got this fixed. If not, I would be willing to buy the car from you.

Your best bet is to refer to Surreal Development’s General Motors Emissions Diagnostic Guide to resolve the issue(s).

I thought I had a NOx sensor problem which triggered a speed limit countdown, but what fixed it was performing the DEF Fluid Quality Test which included a regen.

Just my two cents: F%&# the dealer! I am guessing they suck where you live just as much as they do where I live. Save yourself thousands of $$$ and the frustration and fix it yourself with a OBDLINK LX module and Gretio subscription. That is what I did, and I am so thankful for this community for helping me get back on the road with my 2014 CTD with almost 160k miles on it now. It is running better than ever!
 

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That is the year of my Chevy Cruze Diesel. If I had it all to do over again, I would NOT purchase a Chevy Cruze Diesel, again. As it is, I'm out of warranty, and out of luck, when it comes to all these **** emission sensors throwing CEL codes. Buyer beware.
Like most diesels these days with aftertreatment systems, you can't expect flawless durability with low duty cycle and/or a majority of city driving. I only started having problems with mine once the pandemic hit and I stopped traveling as much for work on the interstate. The key is to use it for long-distance travel as much as possible. That is where my baby shines with unrivaled superior performance.
 

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Like most diesels these days with aftertreatment systems, you can't expect flawless durability with low duty cycle and/or a majority of city driving. I only started having problems with mine once the pandemic hit and I stopped traveling as much for work on the interstate. The key is to use it for long-distance travel as much as possible. That is where my baby shines with unrivaled superior performance.
Same here. I got the NOX2 code after weeks of no freeway driving when covid first hit. After I got back on the freeway the light went out and haven't seen it again (just about 2 years ago).

CTD are awesome if you can put 50-100 miles a day on it (which I do). For other people (weeks of city/short trips only) I would also agree to not recommend it.
 

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Not sure if this is the right place to post but I had all the same issues i'm seeing here before I bought the TriFecta tune. Please trust me that I'm NOT advocating or endorsing the company, only offering personal experience. I burned the traditional NoX1 and NoX2 sensors twice under warranty and never since....
I still burn up a DEF heater every 30K since I bought the car new... other than that, I've experienced none of the issues I see regularly expressed here. The tune is completely emissions compliant with both states i've resided in, Washington and Idaho, and has produced no negative effects on my driving or maintenance.
My 2014 2.0 was purchased new in 2016 and the TriFecta tune is the only modification (not installed till 2021). I've had the sunroof glass recalled, the DEF heater replaced 3x under warranty, the steering rack replaced for lack of return to center issues, from new (later proven to be tire issue caused by factory tires, after extensive dealer and manufacturer effort, credit to them), and learned the hard way that 4.8 QTS really means NOT 5QTS(at the dealer thankfully) only manual regen required so far.
Fuel mileage is subjective based on use and conditions. Do NOT expect a gain in MPG. My personal driving habits are somewhat aggressive and lead to accelerated wear due to cornering forces. My experience has proven that increased power usage negated any possible MPG gains but driving same said vehicle daily offered a more than favorable driving experience vs fuel consumption. Other drivers may see different results, because... reality... more power requires more fuel, duh. I guess I mean to say that any increased efficiency was lost on me due to my appreciating the improved engine performance... which I enjoy regularly.
 
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