i had the same problem gen 1 2.0L diesel. Ended up going to the steelership. The reset the ECM and forced regen. Been perfect ever since. Of course it cost $125.00. They said there was nothing wrong with it. Frig-in A holesDriving south today in bitter cold, about -4ºF. I spent at least an hour of highway driving with the engine up to temperature. Halfway through the drive, the engine seems to start a regen cycle with fuel economy hovering in the 30s at highway or city speeds. The regen cycle was dragging on very long again, so I cycled the engine to restart and the regen continued. Driving an excessively long highway route to my parents' house did nothing to stop the regen.
Then, a block from their house, the CEL illuminates.
I guess today I'm going to the local auto parts store to get the code read, and then will see what happens after that. Overnight low might be down to -5ºF, so I'm going to fill the fuel tank up with a good dose of Power Service white bottle.
If you did end up with a substantial percentage of biodiesel, even if within the 20%, it's possible that it's gelling in the filter and causing issues with fuel delivery that would prohibit a successful regen. The fuel would ungel in the heated dealer shop, so they wouldn't see the issue when they did a regen. That's just a thought.Today they cut me loose with the car while they order the sensor (should be there tomorrow). Their tech worked with GM at HQ and they think it's some sort of "glitch," which doesn't sound like a great explanation.
First, they said the tech tested the fuel and found biofuel in the tank. Well, no kidding, because every fuel station is selling biofuel. The ASTM specifications for diesel fuel were revised to include up to 5% without any labeling required, and then the stickers can be displayed on the pump for a 5-20% biofuel blend. Likewise, GM warranties the car for up to 20% biofuel.
They said the sensor appears to be reading fine but is still somehow causing problems, so they've confirmed it's under the powertrain warranty and they're going to replace it to satisfy GM as a warranty item to be billed that way.
Hard to know. I can't tell if the dealership is replacing that sensor because GM tech support told them to do it, or if they're doing it to get everything they did billed as warranty work. The service writer did mention they wanted to get the technician paid for his diagnostic time, so it sounds like they want to bill this to GM instead of me again after they couldn't find anything wrong with my car blowing blue smoke out the tailpipe.If you did end up with a substantial percentage of biodiesel, even if within the 20%, it's possible that it's gelling in the filter and causing issues with fuel delivery that would prohibit a successful regen. The fuel would ungel in the heated dealer shop, so they wouldn't see the issue when they did a regen. That's just a thought.
There is literally no where that I can buy fuel without biodiesel in it. Every single pump all over town has the 5-20% stickers with the exception of my local HyVee grocery, and even then that fuel can have up to 5% without it being labeled as such. I have no way to purchase fuel that I know is exclusively petroleum.If you did end up with a substantial percentage of biodiesel
I don't know any places that sell a specific 20% blend at retail. Oil companies have that as off-road fuel for farmers, but you can't get it from the pump. The stickers on all the pumps are 5-20% meaning you are probably getting 20% or close to it in summer and dropping down to 5% or less in winter. Minnesota runs 5% year-round as (I believe) the first state to require that in all diesel sold.I remember the last time I was in IL, we had to grab diesel and it was B20
5% wouldn't be an issue, but 20% could be ... stations (or rather their suppliers) should adjust the percentage based on weather, and use appropriate additives in their fuel supply for the time of year. I'm just saying it's possible that a fuel supplier dropped the ball. I've had issues with the cars I rarely drive because I go through so little fuel that there's still summer fuel in them come winter. If it's persistently cold, it would only take one off batch as buildup in filters can be hard to break down even with de-gel treatments. It's just a thought, that if it persists, you could try changing the fuel filter early. Though I would think now that it's been in the heated shop it should be fully ungelled and wouldn't gel again as long as you don't have the misfortune of hitting another off batch.There is literally no where that I can buy fuel without biodiesel in it. Every single pump all over town has the 5-20% stickers with the exception of my local HyVee grocery, and even then that fuel can have up to 5% without it being labeled as such. I have no way to purchase fuel that I know is exclusively petroleum.
I found a Mobil station in 2018 that had a label on the pump stating the B20 diesel was a non-Mobil product - probably some local oil company blending B20 for bulk delivery, like is done to farmers. If it were a FS product, that's great. I passed because I didn't know where it came from.If I recall, this was a Mobil station
It saves me from paying the bill and there is a possibility I get the money back from the prior complaint (blue smoke out the tail pipe).I guess let them do their thing and hope it takes care of it. At least they are making an honest try at it!
Getting the money back from before would be nice.It saves me from paying the bill and there is a possibility I get the money back from the prior complaint (blue smoke out the tail pipe).
Makes me wish I had just ignored the CEL and let it go. After a couple weeks it would probably disappear on its own.
Yep, takes a looong time if ever depending on outside temp. A winter front over the grille helps, i had one on my gen 1. The gen 2 is much better, but below -20F it still struggles to get the engine up to temp.I have seen both Dcruzes I have owned not heat up properly when there is a heavy heat load on the engine.
If the coolant does not heat up after an hour then what about the oil?
I did clear the code. After that, it was back in regen when I pulled out of the parking lot because I figured the ECU was immediately running a regen to clear the DPF and to check if the temperature sensor was working. It was about 10ºF out and I took it for a highway drive on the loop around the city. At 55 mph it was achieving about 30 mpg and in regen for at least 20 minutes - then the CEL was on again.Getting the money back from before would be nice.
That's why I usually clear them at least once to confirm the trouble, and rule out a fluke glitch. Especially when extremely cold.
Does the oil cooler have a thermostat for bypass? My Mazda RX-7 had an oil-to-air cooler and it had a thermostat that would open at 180ºF if I am remembering correctly. It bypassed (or mostly bypassed) the cooler if oil temperature was lower than that.Oil temp will be close to coolant since the oil cooler uses the coolant.