Troubleshooting Duramax L5P Injector Circuit Codes
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- Опубликовано: 26 сен 2024
- Troubleshooting P0201, P0202, P0203, P0204, P0205, P0206, P0207, P0208 on a Duramax L5P.
Tags: Duramax L5P injector connector
Duramax injector connector pin tension
Dude, thank you so much for making this video.
As a retired mechanic I really appreciate the information you provided here. I would have very limited information available had you not shown me the pin numbers at the ECM connector. If you know where or how I might obtain the wiring diagrams for my 2021 L5P truck please let me know. Thanks very much! I am now subscribed.
Alldata is what I use. Try Alldata DIY. It will cost you some $ though. I think you have to pay to unlock one vehicle for a whole year. Gets expensive but if you only need one vehicle it's not too bad.
@@TechnicianRed Will do, thank you!
general motors is aware of the faulty part they have made a new part and therefore they should do the right thing and do a recall instead this cost falls consumers head we need a class action lawsuit against GM for this issue
Interesting. I wasn't aware they updated the connector. Last one I did was when this video was published.
I know that some of the sensors utilize 5 V. I had to replace my injector and plan on cleaning all of them outside of the engine block. What is the appropriate voltage for the injectors?
Not sure on these Duramax injectors, but most are around 48V
It’s no wonder why people tune and delete their trucks with all this JUNK on them, seems like everything is so sensitive
I keep having P026D appear after I delete it. Ever seen this? I've changed Map sensor, added S&B Map sensor spacer , changed fuel filter and cleaned air filter, but code keeps coming back. My BLUEDRIVER scanner reader says "fuel Injection Quantity higher than expected.
I haven't ran into that code yet but a quick Google search shows many things can cause it. Your best bet is to find a good repair shop as it would likely be hard for the DIYer to diagnose. The modern duramax platform takes lots of knowledge to properly troubleshoot.
Have you had the injector replaced before? Is the fuel injector IQA code programmed to the correct cylinder
Same issue here
What was your fix ?
@@lasvegasrottweilersvomprei8589 I replaced all my glow plugs because I had a code on one of those too and CEL has never came back and going on 10K miles. At 100k and the glow plug tips were in bad shape but now it all
Good.
@@lasvegasrottweilersvomprei8589 Remove your fuel filter and look for brass metal shavings. They will be tiny. I replaced various sensors including the MAP&T with no results. It was pretty nasty though. The lift pump in the fuel tank starts to shred itself and those brass metal shavings get caught in the fuel tank pressure sensor giving whacky data to the computer(I think). Now it may make the truck run richer, the would explain the high soot on the MAP&T sensor, but also I am not an expert and also know the MAP&T sensors are known for sooting up in the first place. The truck I worked on was not deleted.
All this being said, I replaced the entire fuel module (the lift pump and sending unit in the tank). GM calls it a fuel module and when I got mine, I paid 3x the cost and GM had none in the country. Big backordered part and it may still be that way.
4 Months later, No P026D or engine light.
Also clean the tank thoroughly from brass metal shavings as these diesels have fuel return lines. I also flushed the lines per GMs TSB on the matter.
Make sure no brass shavings get past your fuel filter. GM has a TSB on how to prevent that as well...
Doing research on this code led me almost no where. Even TSBs just call for a fuel system flush... I don't think GM wants a recall....
It is unclear to me if GM acknowledged the problem with an updated fuel module or new manufacturer. Not sure. A fuel system flush may fix the problem temporarily, but if the pump is shredding brass, that didn't sit well with me. Just replaced it all.
As stated, this is what fixed it for me. I am no expert, but these things are very sensitive with fuel pressure and readings. Truck only had 90K miles as well.
Replacing fuel filters often may help prevent this also, wish you luck!
i have a 23 model l5p with a U1345 code. Any idea??
So you were checking the pigtail by probing into the front side of the ecm connector and nothing else? Right? Set on ohms? And just wiggle the harness and any fluctuation means the pigtail at the injector is bad?
Yes. Except for fluctuations in the resistance doesn't guarantee its the injector connector. You could still have a broken wire or the ECM connector pin could be bad. You must never assume the problem is going to allways be the same as last time no matter how many times you see it. Allways try moving the harness at JUST the injector connector without moving the rest of the harness to get the resistance to change.
Could somebody provide any info for the tools/equipment used to test? What is the specific name for the Matco wire adapter(s)? I have a multimeter tool and would like to be able to test my harness myself. Thanks
Sorry but Matco no longer makes the test leads in this video. You will need to buy the "uTest Advanced Terminal Test Kit" from aeswave.com
What cc’s are these injectors? Just curious🧐
Not sure. They are stock that's all I know.
@@TechnicianRed Can't find it anywhere if you had to guess how many cc's, 1000?
@@kungfujiujitsufliptrick4832 I'm sorry but I have no clue. I stick to the diagnostics and repair side- not the performance side. So I have never researched injector flow rates.
@@TechnicianRedokay I appreciate it I’m a mechanic in the usmc so I was asked and had no idea haha I appreciate the videos keep it up brother
Where is cylinder 5?
I’m having a similar issue with my LML it’s a P2146 code and I’ve narrowed it down to cylinder 1 out of 1 and 4 being in the group but can’t find the issue and I don’t have the means to do this electrical testing, any ideas on how to find the issue?
I’m having the same problem did u figure out what was the cause was
@@Jacob-gl8nt ended up being #4 injector but I kept looking over it cause I was set on it being a issue from cylinder #1. Finally I opened my mind and it was #4 even though it was a brand new injector. Which they were all new it was a first crank after cp4 failure
@@Dmaxtyler I just did cp3 conversion and all new injectors and fuel lines like 5000 miles ago. How did you test the injector to find out it was the injector.
02 6.6L DURAMAX OPEN CIRCUIT CYL 1- 4- 6- 7 HELP
All share ignition voltage from ficm on one wire
We have number 7 code