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Major Electrical Issue or something else?

mikeh67

New Member
Jun 22, 2021
5
6
Truck Year
2016
I'm new to the forum so hopefully I am posting at the correct location. I did an introduction message and highlighted my issue, but didn't want to continue that thread under that category, so I'll summarize here and hopefully can get some help. I'm hoping one day I can provide answers and not just ask questions but right now I new to the ecodiesel.

Just purchased a used 2016 RAM ecodiesel and had a check engine light with the following codes:
P242B - Exhaust Gas Temperature Sensor Circuit Range/Performance Bank 1 Sensor 3
P2455 - Diesel Particulate Filter Pressure Sensor A Circuit High
P2453 - Diesel Particulate Filter Pressure Sensor A - Circuit Range/Performance
Short story is used car dealer said they would order a new Particulate Pressure Sensor and replace it when it came in. I should have know better but I really loved the truck and I went ahead and purchased.
Drove great for about 300 miles, then while driving on the highway I had a loss of power and the message "Service Electronic Throttle Control" came on the dashboard. Still drove ok but seemed like it was lacking power (maybe no turbo?)
Anyway I decided to start looking under the truck for any obvious issues and found the following electrical connection:
1624541088417.png
It was suggested that I check out this and other electrical connections. So that is what I did. Drove the truck onto ramps, turned it off and I was under the truck and made sure there was no loose wires, wiggled all the connectors I could find to make sure they were tight and I spent a fair amount of time on this connection including disconnecting and reconnecting.
Now I have MAJOR issues. The Truck will not start and I get the following messages on the dash board:
Still have the "Service Electronic Throttle Control" message plus the following:
"Service Electronic Braking System"
"Service Trailer Braking System"
"Service DEF System See Dealer"
"Exhaust Filter 80% Full Safely Drive at Highway Speed to Remedy"
"Service Transmission Continue in D. Do Not Shift or Turn Engine Off Until you Reach a Desired Location. You May Not Be Able to Shift Again Until Serviced"

The last one I'm assuming is why I can't start the truck. Also the truck was not running so not sure why it came up saying continue driving.

So I'm "guessing" I have some electrical issues, can't believe the transmission, DEF, trailer brake, etc. all went bad except if it was electrical (especially because I was looking at electrical stuff and disconnected and reconnect the wire connector in the picture.

Does that seem reasonable? At this point I am thinking of maybe looking to replace wire harness on the truck, I'm assuming I will need to replace the harness on both sides of the connector in question. Or am I looking at the wrong place? Any other suggestions would be greatly appreciated.

Mike
 

Tremper126

Moderator
Staff member
Feb 15, 2019
842
309
Truck Year
2014
So to be clear, the codes got worse after you played with the wiring? It’s deffinately got to be something in the large plug pictured. If they knit picked wires out and spliced them, then it may be the plug is failing. Correct splicing wire to wire shouldn’t be an issue, but it’s most likely 110% electrical.
 

GearHead

Active Member
Sep 13, 2016
355
121
Truck Year
2014
Wow!! Assume picture.
I have only witnessed this type of wiring "repair" when the gang plug has corrosion or bent connector pins. I would agree partially with Tremper126, You have additional electrical issues.
First: the first three codes if not corrected at the source, will result in a "Limp Home Mode" activation once they trip again while being an active code in the ECM memory.
Second: the "Service Electronic Throttle Control" also results in immediate "Limp Home Mode"
Third: once "Limp Home Mode" is engaged the DEF regeneration is stopped and your shift is limited to third gear, the turbo boost is limited, the fuel injectors timing is limited as well. If you continue to drive the vehicle your next list of codes will result, along with "Low Turbo Boost", "Fuel Inject capacity below expectation" and whatever issues the previous owner was trying to correct with the wiring jumpers.
There are numerous threads regarding the "Service Electronic Throttle Control" error message. My humble investigation has found at least 86 issues which trip this code. Some as mundane as a loose connection at the camshaft position sensor to exhaust temp sensor or EGT temps.

If you are considering wiring harness replacement, you are correct, you will need to replace both sides of this connection. At present I am not aware of any repair connectors available from FCA or the aftermarket. A technician familiar with this vehicle and it's systems is without a doubt indispensable.

Good luck.
 

mikeh67

New Member
Jun 22, 2021
5
6
Truck Year
2016
Update - Had my local RAM dealer replace the connector (both sides) and all codes and issues were cleared. Cost around $900 but given the headache that a bad electrical connection could cause it seemed worth it. Had I been able to find an aftermarket connector with pigtails I would have done it myself.
Thanks for the info and advice. Looking forward to spending more time on this forum.
 

Jackpot

New Member
Nov 14, 2022
1
0
Truck Year
2016
Update - Had my local RAM dealer replace the connector (both sides) and all codes and issues were cleared. Cost around $900 but given the headache that a bad electrical connection could cause it seemed worth it. Had I been able to find an aftermarket connector with pigtails I would have done it myself.
Thanks for the info and advice. Looking forward to spending more time on this forum.
Hi mikeh67, i have the same issue, got HPFP & lift pump change and then the garage tried to fix the fuel in water sensor and got all strange code after that.
By chance do you know the part number for the the connector they've replace,, can find it online?
 
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