5thGenRams Forums

Register a free account today to become a member! Once signed in, you'll be able to participate on this site by adding your own topics and posts, as well as connect with other members through your own private inbox!

Start Stop System Issue, Only during cold starts & P0456

Jerryallday

New Member
Joined
Oct 25, 2023
Messages
1
Reaction score
0
New to the Forum, I have a 2019 Ram Rebel 3.6 v6. 78K miles

I have been having issues with my start-stop system. I took it to the dealer and they told me to replace my main battery and that would fix the issue.

Well, it hasn't after replacing the main battery. One thing I have noticed is the light only comes on in the morning or after the truck has been sitting overnight. If I drive a few minutes and turn the truck off and back on right away the light disappears. On my way home from work, the light doesn't come on either. It only when the truck sits for at least 10-12 hours. Do I have a small battery draw?

The truck has been giving me issues and it feels like they all came at once after years of no problems. at the same time, I had a CEL with a missed fire in cylinder #4 and found coolant in the cylinder. I had both sides of the heads resurfaced and new gaskets everywhere they were disturbed, new spark plugs, coolant, and oil. This fixed that CEL light.

Yeterday, I got a P0456 CEL. I did a little research and ordered some parts from Rockauto based on some videos on YouTube. Parts come in tomorrow, I reset the CEL light for now and it hasn't returned.

2019 RAM 1500 3.6L V6
DORMAN​
310219 (310-219)Vapor Leak Detection Pump
$ 15.18​
$ 0.00​
1​
$ 15.18​
DORMAN​
911410 (911-410)Vapor Canister Purge Valve / Solenoid
$ 17.75​
$ 0.00​
1​
$ 17.75​
 

6of36

Spends too much time on here
Joined
Jan 19, 2023
Messages
3,000
Reaction score
1,864
Location
Michigan
New to the Forum, I have a 2019 Ram Rebel 3.6 v6. 78K miles

I have been having issues with my start-stop system. I took it to the dealer and they told me to replace my main battery and that would fix the issue.

Well, it hasn't after replacing the main battery. One thing I have noticed is the light only comes on in the morning or after the truck has been sitting overnight. If I drive a few minutes and turn the truck off and back on right away the light disappears. On my way home from work, the light doesn't come on either. It only when the truck sits for at least 10-12 hours. Do I have a small battery draw?

The truck has been giving me issues and it feels like they all came at once after years of no problems. at the same time, I had a CEL with a missed fire in cylinder #4 and found coolant in the cylinder. I had both sides of the heads resurfaced and new gaskets everywhere they were disturbed, new spark plugs, coolant, and oil. This fixed that CEL light.

Yeterday, I got a P0456 CEL. I did a little research and ordered some parts from Rockauto based on some videos on YouTube. Parts come in tomorrow, I reset the CEL light for now and it hasn't returned.

2019 RAM 1500 3.6L V6
DORMAN​
310219 (310-219)Vapor Leak Detection Pump
$ 15.18​
$ 0.00​
1​
$ 15.18​
DORMAN​
911410 (911-410)Vapor Canister Purge Valve / Solenoid
$ 17.75​
$ 0.00​
1​
$ 17.75​
You started a thread about start stop issue, and you told about other issues, but didn't really explain what your issue is with start stop.
 

23RAM

Well-Known Member
Joined
Feb 23, 2023
Messages
478
Reaction score
494
Location
Canada
New to the Forum, I have a 2019 Ram Rebel 3.6 v6. 78K miles
You have a 4th generation RAM so you're asking in the wrong forum. However, it sounds like a heat-related intermittent problem.
 

Alakdan

Active Member
Joined
Nov 8, 2021
Messages
42
Reaction score
16
New to the Forum, I have a 2019 Ram Rebel 3.6 v6. 78K miles

I have been having issues with my start-stop system. I took it to the dealer and they told me to replace my main battery and that would fix the issue.

Well, it hasn't after replacing the main battery. One thing I have noticed is the light only comes on in the morning or after the truck has been sitting overnight. If I drive a few minutes and turn the truck off and back on right away the light disappears. On my way home from work, the light doesn't come on either. It only when the truck sits for at least 10-12 hours. Do I have a small battery draw?

The truck has been giving me issues and it feels like they all came at once after years of no problems. at the same time, I had a CEL with a missed fire in cylinder #4 and found coolant in the cylinder. I had both sides of the heads resurfaced and new gaskets everywhere they were disturbed, new spark plugs, coolant, and oil. This fixed that CEL light.

Yeterday, I got a P0456 CEL. I did a little research and ordered some parts from Rockauto based on some videos on YouTube. Parts come in tomorrow, I reset the CEL light for now and it hasn't returned.

2019 RAM 1500 3.6L V6
DORMAN​
310219 (310-219)Vapor Leak Detection Pump
$ 15.18​
$ 0.00​
1​
$ 15.18​
DORMAN​
911410 (911-410)Vapor Canister Purge Valve / Solenoid
$ 17.75​
$ 0.00​
1​
$ 17.75​
How did you replace the Vapor Leak Detection. Seems it's PITA to replace due to heatshield blocking.
 

Cbty2050

Ram Guru
Joined
Dec 26, 2021
Messages
1,814
Reaction score
1,213
How did you replace the Vapor Leak Detection. Seems it's PITA to replace due to heatshield blocking.
You used YouTube to order parts, imagine if there was a video source on how to replace the ESIM.
 

Alakdan

Active Member
Joined
Nov 8, 2021
Messages
42
Reaction score
16
You used YouTube to order parts, imagine if there was a video source on how to replace the ESIM.
I got the part number using the VIN in mopar store and cross ref it for local available non mopar stocks. Hope I got the right one.
I'm gonna try again today to replace the ESIM by bending the heatshield.
 

Triton2k3

Active Member
Joined
May 31, 2021
Messages
35
Reaction score
4
I got the part number using the VIN in mopar store and cross ref it for local available non mopar stocks. Hope I got the right one.
I'm gonna try again today to replace the ESIM by bending the heatshield.
Did this resolve your problem? I am having a similar issue.
 

Alakdan

Active Member
Joined
Nov 8, 2021
Messages
42
Reaction score
16
Did this resolve your problem? I am having a similar issue.
2 months ignoring this error. Clearing the code everytime it show up.
I just replaced it today.
The permanent error code P0440 is gone now.
 

Attachments

  • 0225-01_1708895639653.jpg
    0225-01_1708895639653.jpg
    81.4 KB · Views: 6
  • 20240225_150709.jpg
    20240225_150709.jpg
    95.1 KB · Views: 6
  • 20240225_155110.jpg
    20240225_155110.jpg
    121.2 KB · Views: 6
Last edited:

Users who are viewing this thread

Top