LOL, well, I'm not quite there yet!Diesel, I think what that light means is that your Cruze is due for a delete and a tune.
That makes a lot of sense. Also, from where I had a bad oil drain plug gasket, oil leaked directly on it for several months too.My guess, based on what you describe (DEF Poor, but no CEL) is that you might be looking at a clogged or malfunctioning DEF injector. Since bad DEF is unlikely, and a NOX sensor problem should set a CEL, that leaves the injector, unless a CEL does set before you accomplish the repair. With the number of miles you have put on, I can imagine that, if that injector hasn't reached the end of its useful life, it at least has built up some crystallization or corrosion at this point that might be enough to impair its performance.
I am hoping this addresses the issue with mine. It goes into the shop next week.I Just received a recall notice about Nox1 sensor (replace req'd) and or soot buildup on Ox sensor (nothing about replacing it?), think it might be related to the 'Bad Def' readings people are getting.
Keep us posted - this seems to be a different flavor of the issue. It almost sounds like the injector is clogged in this case.And so it begins, caught a P249D on the way home. Cleared it in the driveway, came right back on restart.
P249D -> Closed loop reductant injection control. control limit reached low flow detect.
We just stepped into winter a few days of freezing weather. I'm thinking heater also.
I filled the DEF last-night and cleared the code 1/2 way to work this am, stayed cleared, will monitor.
This would go hand-in-hand with the 'poor DEF' warning.
The dealer put it in to see if GM would approve all or part of it, but it came back that I was just too far out based on mileage. I agree with them. I am 71K miles past the warranty coverage limit.
It seems as if there are very inconsistent symptoms, all for the same issue. I think I am the only one that didn't get a CEL, but I'm pretty sure everybody else got the reduced speed message.I know I'm way late to the party on this one, but I had that same repair. I didn't get the DEF light, but I certainly got the CEL. Strange thing is, I never got a reduced speed message. I drove with the bad tank heater for almost 2 months before it was repaired; and this was when I was putting 25k miles on the car a year.
That's what my dealer did. They were still able to diagnose the problem with no CEL. I've gone at least 2500 miles since then with no further issues, and I never changed the fluid either. Mine was not covered under warranty since I was out by 70K miles.Last time the DEF heater failed I had a code that identified it. Is there a chance the dealer would replace it with no code, just symptoms?
The speed limit/poor DEF quality issue is extremely likely the DEF heater. They are apparently not doing a good job of diagnosing it. That repair is covered under a 10 year 120K mile extended warranty. I am 99% sure that's what the issue with your car is. My dealer was able to diagnose without a CEL present.I hope I can get the car out of there without them charging me for diagnosing the problem. I need to drive it about 45 miles home at 55MPH I don't even know how far the car will let me go at that speed. Plus, if I obtain the sensor online and I'm still in limp mode???
Is there truth to there being a possibility of getting rid of the DEF system and re programming the ECM to run without it?
Outside of the DEF issues and always paying to be part of the dealership's learning curve I'm very happy with the car.
Good luck with everything, it sounds extremely frustrating.Thanks for the responses guys. I like to fix and maintain my one vehicles. I am pretty frustrated that if I am resigned to take it in to the dealership they just guess and throw parts at it, too.
They told me they drove the car with a laptop hooked up and another tech watching readings and figured the Nox 2 was the problem. I asked why there was no code. They don't know.
While I was there waiting the other day I submitted the request for reimbursement on the last DEF heater. The record of their diagnosis of that one noted that the ohms for the heating element were off. I think I need to go there and move the crap out of the trunk and ask them to check that again. Especially if a bad DEF heater can put it in limp mode and the NOX 2 sensor can't.
Hopefully that's it. Keep us posted on how it does moving forward.OK.. just an update. Limped it to the dealership. 12 miles from the 55 MPH limit. They swapped out the nox #1 sensor, reflash, and did the regen on the recall. Still wouldn't come out of limp mode, wouldn't pass DEF quality test. And, still no codes.
Two of the guys took it for a spin with the laptop and saw that nox #2 was not working. Service quoted me $1300 to replace that and do the suggested radiator and trans fluid flush, only about $900 just to do the nox sensor only (that was 3 hrs labor). I waited a couple of days so I could call and speak to them without yelling.
I was just going to go get it and order the sensor online. But, they backed off of their list price on the part to $350 and I OK'd 2 hrs labor. So $600 plus tax and we're down the road.
The dealer is 45 mi away so that was a factor. If I paid $125 for 1 hr diagnosis and swapped it out at home and that fixed it and cleared the warning out I'd be good. But if they needed to do something for it to do the DEF quality test then I'd need to bring it back. I didn't know if the "DEF quality test" is just part of normal operation of the motor or if it was initiated by them. They implied I'd still need to bring it back after I changed it myself. I know this is not always the case and I'm sure they don't know if I'd need to bring it back either.