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Discussion Starter #1
I am glad it happened close to home!

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Sounds like Domenic is getting a lil sick..........


is that the DPF cel I see on the speedo??
 

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Not good

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Discussion Starter #4
Sounds like Domenic is getting a lil sick..........


is that the DPF cel I see on the speedo??
No, I think that's the one for the DEF. Oddly enough, there was no actual CEL.
 

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It is the DEF warning light. Odd there is no CEL. Might mean you actually have bad DEF.
 

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Discussion Starter #6
It is the DEF warning light. Odd there is no CEL. Might mean you actually have bad DEF.
Hmm, that hadn't occurred to me. I just filled it up with a fresh container about a month ago.
 

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DEF has a limited shelf life and it's dependent on stowage temperature. I only had to buy one container so far and was not happy that there was no data for expiration nor manufacture date on the package. Given the potential expensive repairs possible, maybe the cheapest way to try and fix this is to extract the DEF and fill with fresh fluid? Hope it's not any worse than that. Do keep us posted on how you correct this problem.

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DEF has a limited shelf life and it's dependent on stowage temperature. I only had to buy one container so far and was not happy that there was no data for expiration nor manufacture date on the package. Given the potential expensive repairs possible, maybe the cheapest way to try and fix this is to extract the DEF and fill with fresh fluid? Hope it's not any worse than that. Do keep us posted on how you correct this problem.

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how many times do you know of that 'bad def' was actually to blame?

im not aware of any.
neither are the 20 or field mechanics that ive asked.
100+ yrs of experience, and no time was the def ever 'bad'
 

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On the Cummins forums several had excessive use with DEF that had been sitting around in high temperatures. It can be an issue, that said, some faulty sensor would also not surprise me.. but the correlation to recent DEF add and this condition is certainly suspect as to a fluid problem.

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DEF goes bad more than you think. If the vehicle had a sensor, component, or heater reporting a fault you get a CEL along with the DEF warning light and a message on the DIC: SERVICE EXHAUST FLUID SYSTEM or SERVICE EMISSION SYSTEM. When my heater failed I got the SERVICE EXHAUST FLUID SYSTEM message. We have seen other cars on the forum have bad sensors resulting in the message, but there is usually a CEL along with it.
 

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did you even read what you linked?

rofl
Yes, what is your point? A guy fills DEF and gets poor DEF warning, like OP... How's that not relevant? If poor DEF was not a possibility why does the car even monitor for this? As an engineer, it's clear this was an anticipated problem, hence the system to monitor quality.

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Yes, what is your point? A guy fills DEF and gets poor DEF warning, like OP... How's that not relevant? If poor DEF was not a possibility why does the car even monitor for this? As an engineer, it's clear this was an anticipated problem, hence the system to monitor quality.

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his 'bad def' problem was solved how?....yeah, couple miles later the cel went away....there was no problem...there was no 'bad def'

the cruze nor other vehicles for that matter do not have the ability to monitor the quality of the def on board.

computer gets info from the sensors, if its out of whack, def quality cel goes on....

but its never the def that is the issue....perhaps an overstatement....its never been the def in any circumstance that im aware of, in hundreds of vehicles.

but 'bad def' gets bandied aboot needlessly.

you know how mechanics (again or at least the mechanics ive spoken with) test the quality of def? pour it in a water bottle, if it looks like def, its def...it dont look like water

not one of them had a def refractor, nor did their shops

its not gonna be the def.
 

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Are you sure it doesn't look like water??

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It monitors the ability of the DEF injection with SCR to remove NOx. If it's not performing as expected, you get poor DEF quality message. As DEF degrades over time, it breaks down and more is required to remove NOx, eventually it can get to a point where it is not sufficient, thus thee message and warning, and reduced power. Part of that is regulatory compliance with EPA emissions. To say it doesn't happen because you've not specifically seen it is annectotal. It may be rare, but clearly it can happen.

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