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My 2018 2500 Laramie Mega Cab gasser came on last week after I had to put it in 4wd to back the trailer up into the camping spot because of the wet grass. I checked the seating of the focus and disconnected the battery for ten minutes like someone else on the sight mentioned and it stopped until I had to put it in 4wd again when I was putting it into storage and it started again. Got it into the dealer yesterday and they said the hcu had to be replaced. Coincidence or timing because that wasn't the first time the truck had to go into 4wd to move a trailer.
Our 2018 needs its 2nd HCU replaced in 2 years and now they are telling me the part is on back order!
 
I have had similar problems 2018 2500 6.7 Laramie 28,500 miles, stuff staying on windshield wipers on, dash lights flashing battery low listening to radio short time needing jump to start service electronic breaks system, traction control I believe I have had it all over the last 2000 miles I have service appointment on Monday will find out but common denominator is hcu, or brake unit short. I do have a draw on one of the batteries I found out but alternator charges batteries are good except for that draw which I suspect is related to the break system either way i believe it is something electronic which is above my pay grade. I suspect 1000-1500 bucks will tell me what the problem is so meanwhile I joined a class action suit to help me feel better this is a common happening with dodge trucks and they knew it would happen I have read.
What class action lawsuit. I have same issues with my 2018 2500 bug horn
 
I have the same problem with my 2018 Ram 2500. Dealer says it’s covered under extended warranty and ordered the ABS control module, but there is no ETA. It seems from reading these posts that there is no actual reliable fix. The truck was very expensive, and only has 13,500 miles. How can we submit complaints? NTSC?
 
I bought an ‘18 3500 with 52k miles a few months ago from a private party. The abs hcu was replaced just shy of two years ago under the factory warranty. I have that paperwork. It has now failed again. Dealer is saying there’s no warranty at all, as warranty for any repairs under factory expires at the same time. What information do you have that the part itself has a two year warranty? What was the outcome of your situation?
After filing a claim with RAM, I was assigned a case # and case worker. It took an hour on the phone pleading my case to get them to do it. It took a while for them to do the right thing, but they agreed to cover about 85% of the cost of the repair. Problem is, the dealer is saying they can't even order the part until at least January......
 
My 2018 Power Wagon has abs off and on. Dealership says needs a HCU and they are backordered and have no ETA. The so called mechanic should be fired because I wanted them to check for a bad wire and all he could do was read the code. Why isn’t RamCares taking care of this problem before someone dies??? They know there’s a defective HCU and that’s probably why you can’t find them
It took me calling RAM and pleading my case person by person getting passed around for an hour before they opened a "case" for me and assigned a "case worker." Then it took another month to get someone on the phone to do the right thing. In the end, they did and agreed to cover the majority of the cost of the repair since it is the 2nd time it has failed. But the service rep at dealer stated he was told by RAM he can't even place an order for the part until at least January. He said since my truck has been in he's had another show up with the same problem. I grabbed it from them today and I guess I have no choice but to wait.
 
I contacted Ram Customer Assistance and got a cal back today with a case number. Matt admitted that he is working another case with the same problem. Apparently he’s in contact with the dealer, Cardinale Way, Santa Ros, CA to coordinate with them on part order expedition. I asked him if the system is being redesigne. He didn’t know, but will ask. I feel like a sucker, but will give them a chance.
 
I contacted Ram Customer Assistance and got a cal back today with a case number. Matt admitted that he is working another case with the same problem. Apparently he’s in contact with the dealer, Cardinale Way, Santa Ros, CA to coordinate with them on part order expedition. I asked him if the system is being redesigne. He didn’t know, but will ask. I feel like a sucker, but will give them a chance.
NHTSA opened an investigation into this matter on November 28, 2022: https://static.nhtsa.gov/odi/inv/2022/INOA-PE22012-9925.PDF I found two articles on the investigation: Heavy Duty RAM Trucks Under Investigation For Braking Performance Loss | Carscoops and Ram HD Pickup Brake Failures Being Investigated By NHTSA
What also is interesting about this is that the 2012 through 2018 models all apparently use the same HCU, but only the 2017 and 2018's seem to have the problem. Also shows it is important to file a complaint with NHTSA if you experience this failure. The complaints appear to have lead to the investigation.

Likely the problem is not the ABS module but the ABS Hydraulic Control Unit (HCU). The dealer needs to pull up the TSB for the fix. Ram recommends replacing the HCU first, and if the C0020-01 code shows after the replacement to then replace the ABS Module. They explain it in a TSB from 2020: S2005000004 RAM Technical Service Bulletin
On my truck they followed this procedure and the ABS module did not need replacing. No code after the HCU was replaced and the ABS module did not need replacement According to the TSB the ABS Module is on restricted supply, and up until the middle of the year the HCU's could be had easily, but since the new version came out they are hard to get.
 
NHTSA opened an investigation into this matter on November 28, 2022: https://static.nhtsa.gov/odi/inv/2022/INOA-PE22012-9925.PDF I found two articles on the investigation: Heavy Duty RAM Trucks Under Investigation For Braking Performance Loss | Carscoops and Ram HD Pickup Brake Failures Being Investigated By NHTSA
What also is interesting about this is that the 2012 through 2018 models all apparently use the same HCU, but only the 2017 and 2018's seem to have the problem. Also shows it is important to file a complaint with NHTSA if you experience this failure. The complaints appear to have lead to the investigation.

Likely the problem is not the ABS module but the ABS Hydraulic Control Unit (HCU). The dealer needs to pull up the TSB for the fix. Ram recommends replacing the HCU first, and if the C0020-01 code shows after the replacement to then replace the ABS Module. They explain it in a TSB from 2020: S2005000004 RAM Technical Service Bulletin
On my truck they followed this procedure and the ABS module did not need replacing. No code after the HCU was replaced and the ABS module did not need replacement According to the TSB the ABS Module is on restricted supply, and up until the middle of the year the HCU's could be had easily, but since the new version came out they are hard to get.
Thanks RaeDawg,
You found more than I did! I’ll file a complaint with NHTSA today. I’ll also use the documents for my ongoing discussion with Ram Customer Assistance. In past product quality issues I have found that making continuous contact helps. I’ll connect back with the forum with any progres.
Thanks,

TomHop
 
Thanks RaeDawg,
You found more than I did! I’ll file a complaint with NHTSA today. I’ll also use the documents for my ongoing discussion with Ram Customer Assistance. In past product quality issues I have found that making continuous contact helps. I’ll connect back with the forum with any progres.
Thanks,

TomHop
The details on the HCU are that the ABS Hydraulic Control Unit part # 68143491AB (that supersedes defective part # 68143491AA) is on national back order. Previously only the ABS module was in short supply and I have not heard if that is still a problem. Latest reports on the forums are that it will not be available until late January. Here is another thread on the forums with more information: Warnings About Service Electronic Brake System
That thread has been going on for years and the last couple of pages have good information about what you are dealing with.
 
Just dropped my 2018, 2500 tradesmen only 24320 miles, in for Traction control light, ABS/EBS lights come on. Looks like there is a problem with the modules and a pump sensor. Per the code we will see. I have seen there are several others having the same problem. No recall since they claim it is not a safety issue.
I rear ended someone on my way home from the dealer after they told me they wouldn’t have the fix until mid-March.
 
Thanks for the info @RaeDawg submitted my complaint as well. Just had my abs module replaced after waiting 2 months for the part. Made it 15 miles before it started acting up again.

The dealer offered me an option to just pay a $200 deductible for the first repair and they would take the issue up with Ram. Not sure how that works or if it will help anyone.
 
Thanks for the info @RaeDawg submitted my complaint as well. Just had my abs module replaced after waiting 2 months for the part. Made it 15 miles before it started acting up again.

The dealer offered me an option to just pay a $200 deductible for the first repair and they would take the issue up with Ram. Not sure how that works or if it will help anyone.
Find out if the dealer followed the procedure in the RAM TSB: S2005000004 RAM Technical Service Bulletin According to the recommended procedures, if you are throwing the C0020-01 code then they should replace the HCU first and if the problem is still present, then replace the ABS module. Last I heard the HCU is a new model and has been on back order, but was supposed to be available about now. I would not be surprised if the dealer replaced the ABS module hoping that would fix the problem because the HCU is not available. In my own case the ABS module was fine but the HCU was bad, but that was last year and mine was replaced with the old model. Apparently I should not be surprised to see it go bad again.
 
According to the invoice I had code
C2200-49 and they just replaced the ABS module. What's really strange is it seems to be getting better the more I drive. Still flashing lights and alarms over some bumps but it used to alarm whenever I pushed the brake to put it in drive.

Has to be lose electrical connection, is that what the HCU replacement really resolves?
 
According to the invoice I had code
C2200-49 and they just replaced the ABS module. What's really strange is it seems to be getting better the more I drive. Still flashing lights and alarms over some bumps but it used to alarm whenever I pushed the brake to put it in drive.

Has to be lose electrical connection, is that what the HCU replacement really resolves?
Information I found says the C2200-49 code is for an internal electronic error in the ABS module. Has the truck been scanned for codes since the repair? The dealer that did the repair should confirm there is not a problem with the replacement ABS module, or the installation. Even new parts (especially electrical parts) can be defective.
 
File a complaint with the National Highway Traffic Safety Administration - the more of us that file complaints to more likely there will be an investigation. 2019-2022 have a recall for the exact issue: Report a Safety Problem | NHTSA
Reported it today to NHTSA. This is the second time I have had this issue. The first time the HCU went bad was in July of 21 when the truck had 29K on it. The dealership replaced it under warranty, after i provided them with video proof of the dash displaying the codes. The Diagnostics showed codes C006A-54, C2212-00 and C220-00 being thrown. Driving yesterday started to get the same warning lights on the dash again as before. Took it back to the dealership this morning, and they told me it would be around 2600 bucks to fix as it is not under warranty anymore. My current mileage is 42K. So the replacement unit lasted ~20 months and 13K miles, not a good track record. I have called Mopar Cares to see if they will assist. I will post updates.

2018 RAM 2500
6.7L Cummins Laramie 4x4
 
Reported it today to NHTSA. This is the second time I have had this issue. The first time the HCU went bad was in July of 21 when the truck had 29K on it. The dealership replaced it under warranty, after i provided them with video proof of the dash displaying the codes. The Diagnostics showed codes C006A-54, C2212-00 and C220-00 being thrown. Driving yesterday started to get the same warning lights on the dash again as before. Took it back to the dealership this morning, and they told me it would be around 2600 bucks to fix as it is not under warranty anymore. My current mileage is 42K. So the replacement unit lasted ~20 months and 13K miles, not a good track record. I have called Mopar Cares to see if they will assist. I will post updates.

2018 RAM 2500
6.7L Cummins Laramie 4x4
$2600 for the repair sounds high, but what parts did they say need replacement? If you need the ABS module or the HCU what did they say about parts availability? Both of those have been back-ordered art times over the last year.
 
$2600 for the repair sounds high, but what parts did they say need replacement? If you need the ABS module or the HCU what did they say about parts availability? Both of those have been back-ordered art times over the last year.
@RaeDawg So just like last time, they have said that the HCU unit was bad and caused the ABS Module to fail, so both will have to be replaced. Part Numbers, 68143491AA Control Unit, 68347098AB for the Module. They did not say anything about the availability of Parts. When they told me the price, i told them I was calling Mopar Cares. Since it is the second time this has happened. We will see if anything comes out of it.
 
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