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(copied from my post in the MPG thread)
To complete a Regen faster, shift down a gear, get hard on the pedal, then coast down, do this for 6-10 miles, and Regen is complete. Make a conscious effort to NEVER park the truck overnight when a Regen is due, the moisture from dew will make the carbon buildup into a mucky muddy mess that takes even longer to burn off.

(Removed dangerous info)
 
When in town I will do same as far as dropping a gear and running higher rpm. Seems to work, as far as increase in power and gain in mpg by adding oil to fuel oil? I can't prove you wrong and one day I may try it but I have my dought.
 
Would adding oil be the same as adding something like Howe's or Power Services diesel treatment? Since they are both making the fuel slicker, or less dry?
Please disregard my previous statement about oil. I will delete it. Researched further (I did it in my Cruze and had no I'll effects over 50k miles) but it can shorten the lifespan of the dpf, and can clog the injectors.
 
I gotten past the first 3 or 4 regens due to driving alot on the hwy. Yesterday i was in rush hour traffic and basically stuck. The truck eventually went into Limp Mode, which reduces your low end tourque causing it to take a while to get up to 60-70 mph. Sucks up hills etc. I thought i could drive it around and eventually reset it but after a long day on the road, i took it into the dealership where they said there was a recall on the DPF sensor. Now i am in a base model Canyon...seriously. Hope to get it back today as i have to tow a camper up to Clemson for the NC State series tailgate this weekend for baseball. Other than this, i had an issue last year with a thermostat covered by warranty but i love the truck.
 
What are you driving?
You seem to have a different vehicle than the res of us.
We are all talking about the 2016/17 GM's Chevrolet Colorado 2.8l Duramax & GMC Canyon 2.8l Duramax
(Babymax I prefer - There is also Littlemax and Minimax)
  1. You my friend are a fucking idiot. Your trying to make it sound like he doesnt know what hes talking about but you dont even know that your truck regens to clean your particulate filter? Try googling the subject before you try to sound smart about something you know nothing about lol. Ps. I am having the same issues and yes I know what I drive it's a. 201
  2. 8 minimax. Fucking clown ass dude
 
new member traveling from ontario to florida had( cleaning exhaust filter must continue driving) come on , on I75 at 70mph for past 6 hrs called ts and was told to keep driving don,t worry going through smoky mts reduced power came on and the big truck behind me was not happy when i slowed down on long hill because truck had no power called ts and they found nearest dealer they tried to regen by letting run at high rpm for 30 min with no success computer said customer fault not covered by warranty they did not know what to do ,it was 5pm told to drive to knoxville with reduced power .find a motel and go to reeder chev at 7am and hope they will look at it as they have a diesel shop after pleading my case they regen it two times and said it,s fixed now 10am but not bad , about half way to atlanta engine light came on called ts on onstar told to keep driving and take to dealer in next 7 days ,went to chevrolet center inc in winterhaven fl on fri they could not look at it till mon, called me at 10am mon said needed part sensor no. 55590140 available in michigen took to friday to get it had to go back to ont on monday missed trip to keys and cannot figure out why it takes 5 days to get small part from mich to fl truck had 7000km on when i left now has 11000 got home no problem also not sure why tech computer said no warrianty as they did not know what to bill me for and did not make up a work order
I’m starting to have a similar issue with my 2017 Colorado Diesel 2.8L.
I almost 47,000 on mine and I’ve had it 3 1/2 years. I’ve never had the Cleaning Exhaust Continue Driving until last week. And it immediately went into Limp/ Low Power mode. I took it to the Dealer in Lake Wales, but haven’t heard anything since last Thursday. Did warranty ever cover any thing?
 
I’m starting to have a similar issue with my 2017 Colorado Diesel 2.8L.
I almost 47,000 on mine and I’ve had it 3 1/2 years. I’ve never had the Cleaning Exhaust Continue Driving until last week. And it immediately went into Limp/ Low Power mode. I took it to the Dealer in Lake Wales, but haven’t heard anything since last Thursday. Did warranty ever cover any thing?
From what others have posted the warranty doesn't cover the exhaust system. That's only covered under the 3/36 not under the drive-train coverage duration. Sucks that the EPA pushed all is garbage onto the manufacturers and ultimately to the consumers.

Please come back and tell us what the resolution is/was as I'm sure there will be readers who will be interested.

Good Luck!
 
Today's diesels with all there exhaust treatment sensors and DPF ect are no good if you do a lot of city driving....

They need heat and a load on the engine to drive the exhaust temperature up to burn off the Soot.

If you spend a lot of time in stop and go traffic the DPF will plug up very quickly
If you spend a lot of time over landing running at slow speeds the DPF will plug up very fast.
If you spend a lot of time on the highway the DPF will take a lot longer to fill with Soot.
If you pull a trailer on the highway the DPF will collect a lot of Soot because of the amount of fuel you are burning, BUT , because you are on the highway the DPF will be very hot.
The heat will burn off a lot of the Soot collected in the DPF. Not all but a lot.
This is called Passive Regeneration.

Driving around in stop and go traffic will fill the DPF very quickly.
When the pressure sensors tell the ECU the DPF is getting clogged or full of Soot. The ECU will start a regen cycle IF the vehicle meets the min speed required of 30 mph. At that time the ECU will spray fuel into the exhaust and that will cause the temperature in the DPF to rise high enough to burn off the Soot. If your speed keeps dropping below 30 mph the regen cycle will fail.
If the regen cycle fails the ECU will display on the DIC keep driving...... This is the ECUs last chance of cleaning the Soot out of the DPF.
If you have seen this msg your DPF is in critical condition. And can be permanently damaged. Or at least it's life expectancy can been reduced.
You don't want to see this msg.....
If you continue to drive in stop and go traffic the ECU will start to limit power to protect the engine. It does this because trying to push exhaust through a plugged up DPF will damage the engine.
If continuing to drive above 30 mph doesn't clean the Soot a forced regen at a dealer is the next step.
Forced regen by the dealer is done by connecting the ECU to the dealer diagnostics computer and starting a forced regen. Not good for your truck but your last resort....

If you follow the forums you may have noticed that people who use there trucks on the highway a lot don't have DPF issues.
Highway driving makes heat and heat burns off the Soot.
Highway driving reduces the amount of regen cycles the ECU commands.
Towing a trailer works the engine and that is what today's diesels need.

Today's diesels are a bad idea for city dwellers that use there trucks for short drives .
Get a gas truck....
 
I have used Stanadyne fuel additive starting day one in my 2019 ZR2. I do a mixture of city/hwy driving and have so far had 20k trouble free miles. One of the benefits of the additive is to reduce soot and burn cleaner. Hopefully the trend continues!
8934
 
I have a 2016 Chevy Colorado Diesel that just hit 131,000 miles. Filled my tank at Costco, drove up the mountain to the ski resort, then on the way back down, the “keeping driving” message came on and kept dinging every 5 minutes or so. The drive down was slow with the snow so I couldn’t go above 30 or give it much fuel. Shortly after, I got the “engine power reduced” and have had that for 3 days now. The “keep driving message comes on when I first drive, but now turns off after I drive at higher speeds and doesn’t come back on until the next drive. I’ve done 30+ minute drives up to 80mph, but it remains in limp mode even though the “keep driving message” clears. On larger hills, limp mode slows the truck to a dangerously slow speed on the freeway. Should I disconnect my battery to try and reset the codes?
 
Th
I have a 2016 Chevy Colorado Diesel that just hit 131,000 miles. Filled my tank at Costco, drove up the mountain to the ski resort, then on the way back down, the “keeping driving” message came on and kept dinging every 5 minutes or so. The drive down was slow with the snow so I couldn’t go above 30 or give it much fuel. Shortly after, I got the “engine power reduced” and have had that for 3 days now. The “keep driving message comes on when I first drive, but now turns off after I drive at higher speeds and doesn’t come back on until the next drive. I’ve done 30+ minute drives up to 80mph, but it remains in limp mode even though the “keep driving message” clears. On larger hills, limp mode slows the truck to a dangerously slow speed on the freeway. Should I disconnect my battery to try and reset the codes?
The truck thinks the DPF is full of soot. It may or may not be the case. It could be a bad temp sensor or maybe a bad 5th injector that sprays fuel into the DPF to get it hot enough to burn the soot out .
There is also a sensor that monitors how much back pressure the soot in the DPF is causing. When it’s hard to push exhaust through the DPF it’s time to burn that soot out.
Your truck is telling you the DPF is full but for some reason it’s not burning off the soot.
Hopefully the DPF is ok and it’s just a sensor.
To narrow this down a bit I need more information.
How much highway driving do you do ?
How much city driving do you do ?
Do you use a fuel treatment ?

Rob
 
Th

The truck thinks the DPF is full of soot. It may or may not be the case. It could be a bad temp sensor or maybe a bad 5th injector that sprays fuel into the DPF to get it hot enough to burn the soot out .
There is also a sensor that monitors how much back pressure the soot in the DPF is causing. When it’s hard to push exhaust through the DPF it’s time to burn that soot out.
Your truck is telling you the DPF is full but for some reason it’s not burning off the soot.
Hopefully the DPF is ok and it’s just a sensor.
To narrow this down a bit I need more information.
How much highway driving do you do ?
How much city driving do you do ?
Do you use a fuel treatment ?

Rob
Thanks, Rob, for looking into my questions. My daily commute is about 30 miles round trip. About half of that is stoplights and half is freeway. Weekends I usually take a 60+ mile freeway trip. Earlier this month I did a round trip between Las Vegas and Salt Lake (900 miles). I drive about 20,000 miles per year. I just started using a fuel treatment when this issue popped up. It says it is a DPF cleaner as well. Since I put that in and got some more fuel from a different place, the “keep driving” message only comes on for about a minute at the beginning of each drive. When the issue first arose, it seemed to stay on almost the entire drive and ding every 5 or 10 minutes. It’s trending in the right direction at least, but the engine power is still limited. I did disconnect the negative battery terminal to clear the codes, but that only lasted about 5 minute before the check engine light was back on. Think it’s the 5th fuel injector or a sensor? I plan to keep using some fuel additives/cleaners to see if it continues to improve.
 
What fuel additive are you using?
I have done a lot of experimenting with my truck. What I found was that if you really hammer it the engine produces a LOT of soot. To the point that it could overwhelm the DPF. Also hammering on the engine before it’s warmed up can lead to no passive soot burn off as the DPF is cold.

What does it say about your maximum speed now that your in reduced power mode?
These trucks will keep reducing your power until you’re at walking speed. This is to force you to get it fixed. If it hasn’t continued to reduce your speed that would indicate a ECU issue.

There has been a few on this site that had to get there DPF replaced as it just wouldn’t clean itself of soot. There is another possibility that your truck was trying to finish a regen and it was shut down over and over because of short trips. And it never got a chance to finish the regen
Or if you put furnace oil in the tank or farm diesel or off road diesel instead of Ultra Low Sulfur Diesel that would be extremely bad. As the DPF would never be able to handle all the soot from non Ultra low sulfur diesel.
If you haven’t add any non ultra low sulfur diesel. It is possible you got some bad fuel.

Just trying to cover some possibilities here.
If the proper fuel was used. And you’re not hammering it all the time.
I would try a mega dose of this. A double dose might fix this issue.
Diesel extreme
Image
This will drive your exhaust temperature up and hopefully clean the DPF

If that works I would run a double dose of this at each fill up
Image


But you may end up at the dealership where they will try a forced regen and look for a reason that this happened to you.

You should consider getting a gauge like this to monitor your engine and after treatment system.
It will allow you to monitor the sensors and show you when the truck is doing a regen.
Its a must have for diesel owners.
Image

There is cheaper options but the leaning curve is much bigger.

Rob
Image
Image
Image
 
What fuel additive are you using?
I have done a lot of experimenting with my truck. What I found was that if you really hammer it the engine produces a LOT of soot. To the point that it could overwhelm the DPF. Also hammering on the engine before it’s warmed up can lead to no passive soot burn off as the DPF is cold.

What does it say about your maximum speed now that your in reduced power mode?
These trucks will keep reducing your power until you’re at walking speed. This is to force you to get it fixed. If it hasn’t continued to reduce your speed that would indicate a ECU issue.

There has been a few on this site that had to get there DPF replaced as it just wouldn’t clean itself of soot. There is another possibility that your truck was trying to finish a regen and it was shut down over and over because of short trips. And it never got a chance to finish the regen
Or if you put furnace oil in the tank or farm diesel or off road diesel instead of Ultra Low Sulfur Diesel that would be extremely bad. As the DPF would never be able to handle all the soot from non Ultra low sulfur diesel.
If you haven’t add any non ultra low sulfur diesel. It is possible you got some bad fuel.

Just trying to cover some possibilities here.
If the proper fuel was used. And you’re not hammering it all the time.
I would try a mega dose of this. A double dose might fix this issue.
Diesel extreme
View attachment 9803 This will drive your exhaust temperature up and hopefully clean the DPF

If that works I would run a double dose of this at each fill up
View attachment 9804

But you may end up at the dealership where they will try a forced regen and look for a reason that this happened to you.

You should consider getting a gauge like this to monitor your engine and after treatment system.
It will allow you to monitor the sensors and show you when the truck is doing a regen.
Its a must have for diesel owners.
View attachment 9805
There is cheaper options but the leaning curve is much bigger.

Rob
View attachment 9803 View attachment 9804 View attachment 9805
I used Lucas Oil Deep Clean DPF Cleaner on my first tank. The truck does seem to be doing better since I got new fuel (filled back up at half empty) and this first fuel treatment. I’ve also had the thought that maybe I got bad fuel. For my next tank, I have already purchased Hot Shot’s Diesel Extreme to use in it.

I wouldn’t say I hammer the accelerator very much, especially when the engine is cold. I also park in a garage overnight (this morning is was 5 degrees outside and my garage was still 40 degrees). I go light on the accelerator when the engine is cold.
The truck hasn’t limited my speed, only my acceleration. I can go 70 or 80 mph, but I have to accelerate medium-slow to get to that point. If I press the accelerator down too far (maybe more than 1/3) the truck will downshift and have high RPMs, but the computer won’t give it fuel. If I do this, the truck actually slows down. So I have to go extra Light on the pedal now (and don’t even think about passing someone on the freeway or on hills). I wouldn’t say power reduction has been reduced any more than the initial reduction.

How long does a regen take to complete? My info center displays the “keep driving” message for about 2 minutes or less and never comes back on until the next drive (at first, it stayed on much longer).

I’ve never used farm diesel or anything other than commercial Ultra Low Sulphur diesel in it.

I will try the double dose of Diesel Extreme next fill up and see if it improves further.
Thanks!
 
I used Lucas Oil Deep Clean DPF Cleaner on my first tank. The truck does seem to be doing better since I got new fuel (filled back up at half empty) and this first fuel treatment. I’ve also had the thought that maybe I got bad fuel. For my next tank, I have already purchased Hot Shot’s Diesel Extreme to use in it.

I wouldn’t say I hammer the accelerator very much, especially when the engine is cold. I also park in a garage overnight (this morning is was 5 degrees outside and my garage was still 40 degrees). I go light on the accelerator when the engine is cold.
The truck hasn’t limited my speed, only my acceleration. I can go 70 or 80 mph, but I have to accelerate medium-slow to get to that point. If I press the accelerator down too far (maybe more than 1/3) the truck will downshift and have high RPMs, but the computer won’t give it fuel. If I do this, the truck actually slows down. So I have to go extra Light on the pedal now (and don’t even think about passing someone on the freeway or on hills). I wouldn’t say power reduction has been reduced any more than the initial reduction.

How long does a regen take to complete? My info center displays the “keep driving” message for about 2 minutes or less and never comes back on until the next drive (at first, it stayed on much longer).

I’ve never used farm diesel or anything other than commercial Ultra Low Sulphur diesel in it.

I will try the double dose of Diesel Extreme next fill up and see if it improves further.
Thanks!
If it didn’t reduce your speed then I think the issue is it can’t push the exhaust through the DPF because it’s plugged up. So go easy. A plugged exhaust can do serious damage.
I read on another forum about a guy with a Ram 3.0 diesel that had a plugged up exhaust and he tried everything to get it to burn the soot out. He was so desperate he ended up using a crazy amount of Hot Shots Extreme I believe he dumped in the entire bottle. It was the small bottle but still way to much. It ended up unplugging the DPF though.
The Hot Shots Extreme is not to be used every fill up. Use the Hot Shots Everyday Diesel with every fill up.
Now that I start to remember he posted a YouTube Video about it..
I run HotShots Everyday Diesel at every fill up. I try and fill up at half a tank and add 1 ounce.
Then I do the HotShots Extreme every 4 - 6 months.
Really hoping this works for you…. As soon as you get the HotShots Extreme I would dump it in and refill the tank. Even if you still have 3/4 tank.
And my truck takes 30 to 40 min to complete a regen.
 
If it didn’t reduce your speed then I think the issue is it can’t push the exhaust through the DPF because it’s plugged up. So go easy. A plugged exhaust can do serious damage.
I read on another forum about a guy with a Ram 3.0 diesel that had a plugged up exhaust and he tried everything to get it to burn the soot out. He was so desperate he ended up using a crazy amount of Hot Shots Extreme I believe he dumped in the entire bottle. It was the small bottle but still way to much. It ended up unplugging the DPF though.
The Hot Shots Extreme is not to be used every fill up. Use the Hot Shots Everyday Diesel with every fill up.
Now that I start to remember he posted a YouTube Video about it..
I run HotShots Everyday Diesel at every fill up. I try and fill up at half a tank and add 1 ounce.
Then I do the HotShots Extreme every 4 - 6 months.
Really hoping this works for you…. As soon as you get the HotShots Extreme I would dump it in and refill the tank. Even if you still have 3/4 tank.
And my truck takes 30 to 40 min to complete a regen.
Finally took my truck into the dealership and they said the truck needs a new sensor in the exhaust and a new inter cooler pipe. Total for $1198+tax. Had to heat the pipe to remove the old one and then did 3 regen cycles to get the spot level to an acceptable level. Do you know what the inter cool pipe does?
 
Finally took my truck into the dealership and they said the truck needs a new sensor in the exhaust and a new inter cooler pipe. Total for $1198+tax. Had to heat the pipe to remove the old one and then did 3 regen cycles to get the spot level to an acceptable level. Do you know what the inter cool pipe does?
Intercooler pipe
Sounds like the pipe I just changed.
mine was from the turbo to the intercooler . That’s the thing that cools the hot air coming out of the turbo before it goes into the engine. Its a radiator that mounts in front of the actual coolant radiator.
Glad you got it fixed …
 
Finally took my truck into the dealership and they said the truck needs a new sensor in the exhaust and a new inter cooler pipe. Total for $1198+tax. Had to heat the pipe to remove the old one and then did 3 regen cycles to get the spot level to an acceptable level. Do you know what the inter cool pipe does?
Depending wheather it's the "hot side" or the "cold side" pipe in question, those are the pipes that connect the output of the turbo charger to the intercooler that's mounted in front of the radiator or it's the pipe from the intercooler to the intake on the engine. If either one is bad the result a rich mixture and it will clog up your DPF quickly. The intercoolers job (short answer) is to cool down the compressed air coming out of the turbo to make it more dense which allows for more HP.
 
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