OBDLink MX+ and Ecodiesel

[djevox]

Is it normal to have a boost psi of 14 at idle?
Even when I **** the truck off the gauge reads 14 psi?


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That sounds like the pid is not converting properly, or you’re not reading the pid that you think should display boost in psi. Atmospheric pressure is roughly 14.7, so it’s likely that you’re actually near 0psi.

 

[NewLove]

That sounds like the pid is not converting properly, or you’re not reading the pid that you think should display boost in psi. Atmospheric pressure is roughly 14.7, so it’s likely that you’re actually near 0psi.

I selected the “Boost pressure measured” pid.


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[djevox]

I selected the “Boost pressure measured” pid.


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What’s the calculation applied on the pid- are you able to see that in the pid settings? It should be something like (A+B)/255. <- that’s not exact since I’m going from memory right now.

 

[NewLove]

What’s the calculation applied on the pid- are you able to see that in the pid settings? It should be something like (A+B)/255. QUOTE]

Cannot see the pod settings.. just selecting it from a list in the Diesel engine control module in OBDLink


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[djevox]

Ok, not sure I can help then since I don’t have that software. I’m using OBD Fusion and I can view and modify pid calculations and display values. I’m still sticking to what I said about atmospheric pressure though. What your gauge is showing you is absolute pressure.

 

[DuckySaurusRex]

This is what I’m talking about. I never noticed this until after I plugged in the Mx+. It’s like a clicking noise after turning off the truck when it’s running. But when I keep it in run the noise isn’t there. Just when I actually start the truck.

kind of sounds like a relay clicking away

 

[NorthStar]

For those looking to monitor the miles between regens, there are a couple of PID you can monitor as follows:

1. Covered Distance Since Last Regeneration (km, miles, ft) - this will show how many miles you've driven since your last regen
2. Mean Driven Distance of the last Regeneration" PIDs - there are a couple you can choose - this shows the average miles between regens your truck has been getting

 

[djevox]

For those looking to monitor the miles between regens, there are a couple of PID you can monitor as follows:

1. Covered Distance Since Last Regeneration (km, miles, ft) - this will show how many miles you've driven since your last regen
2. Mean Driven Distance of the last Regeneration" PIDs - there are a couple you can choose - this shows the average miles between regens your truck has been getting

Those sound calculated- do you know the hex values and equation for them?

 

[NorthStar]

Those sound calculated- do you know the hex values and equation for them?

I’m a Ram driver, not a space shuttle astronaut. Not a clue. I wouldn’t know where or how to find that info.

I just remembered I had to utilize hex codes when I had the ScanGauge 2 monitor for my 2nd Gen Ecodiesel and my CTD. However, with OBDLink and the MX+, all hex or any PIDs codes are embedded in the software so you don’t see it and cannot program it.

 

[NewLove]

Do you leave your obd MX plugged into the port all the time?..


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[NorthStar]

Do you leave your obd MX plugged into the port all the time?..


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Yes, I leave it plugged in 24/7 and have not had an issue to date.

 

[agelter]

Well I have good news and I have great news. Good news is I got a full refund for the OBD Link, the great news is that I received an email from OBD support after getting the refund notification, he suggested to change the year of my truck in the vehicle editor, so 2021 instead of 2020 then rescan the PIDs and now everything works, It’s hard to believe that after almost 3 weeks of frustration, back and forth communication delays and all it took was to change the year of the truck to make the OBD link function properly.
Hopefully this will help others if they come across the same scenario.

Unfortunately, I'm running into this same problem, and changing years didn't make a difference for me. I've added and removed the vehicle multiple times from the app, tried setting the year to different values (the truck is a 2020), and rescanned PIDs each time. It either comes up as "Engine Control Module (Gasoline)" (if I keep it at 2020), or if I choose a different year, I don't get an Engine Control Module entry at all. Anyone else run into this and find a solution?

 

[Crazy Dane]

Is this still the best mouse trap to monitor regens and such?

I normally would be looking at trading up in the next 6 months to a year but with the discontinuation of the Eco Diesels I might keep this one a bit longer, doing so I think I want to monitor things better. The eco has been a godsend to my camper towing and general driving altogether. I had a Hemi before this and don't want to go back to a gasser and I don't want to move up to a 2500 series. I have never been a fan of GM but the baby Duramax has got my attention.