Detroit Diesel - Low DEF Pressure
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- เผยแพร่เมื่อ 30 ก.ค. 2024
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"EEC 61", SPN 4334 FMI 7, "Low DEF Pressure"
Does your EPA10 DD13/15 have a Malfunction indicator light (MIL) and/or Check engine light (CEL) on with this code? This is one of the most common causes for this problem that I see. It could happen in a Freightliner Cascadia, an M2, a Western Star or anything else powered by an EPA10 DD13 or DD15. When this problem goes misdiagnosed, it can get quite expensive. This is basically a free check you can add to your regular maintenance to save yourself a lot of time, money and frustration down the road! - ยานยนต์และพาหนะ
I remember when those codes use to be a thing in my truck life. But not anymore
Did the pneumatic switching valve replacement and cleaning of system parts. This fixed an extremely annoying problem. Thank you very much.
Been dealing with this code for a couple weeks now. This fixed it. Thanks so much and I really appreciate how thorough you are
Thank you thank you thank you! Great explanation of my issue and how to repair it.
Cascadia DD13 - Thanks for the informative & helpful video. I didn’t have a lot of oil but the filter screen was clogged.
Great video and information thanks for sharing.
Thank you. That was one of my problem
thanks for the insight. very detailed
Thank you very much, very helpful information. I fix my problem. All the best👍👍👍
Thank you so much
Very good info thanks. ...for what trucks years this info apply?
Hey I got the pump changed and still has that code. I did took the metering unit apart and clean. When I took off the air line and there is no oil coming out. What can still cause this code?
Awesome video thanks for the simple explanation
+Crystal ojeda No problem. Glad you liked it.
Hi my friend I have the same code, and I already change for a new one all the parts that you show in your video but I didn’t clean the airlines because a don’t know how can i do that so I turn on my truck and I still having the same code, can you show me how can I clean the lines, when I remove that parts I saw the same oil that you show in your video. I’m in New Jersey and I need drive to Florida tomorrow, do you think that my truck can get to Florida before turn on the red light, I know that if I continue driving with these code maybe it’s happen. Please answer as soon as posible. Thank you my friend.
good video. thanks for making it.
+usdpaulp No problem. Hope it helps.
Thank you
Ok thank you
i have exactly this problem,letme doing and i let’s know if works,thanks for now🙋🏻♂️
what's the part number for the fitting with the screen inside it?
I keep getting a Engine derate and it’s saying it’s the DEF PRESSURE SENSOR. i took to Peterbilt they said my filters needed to be replace they were dirty and the pump cap has a leak so I replaced that. And now the same code is still popping up now they’re saying the recommend replacing the DEF PUMP.. any recommendations? The code is intermittent comes active and inactive
How do you access the grafts like that
I have a code today eec 61 4335 for a metering unit low pressure. Someone else recommended replacing this before replacing the expensive one. Now can I do it my self and just do a regen after or the light will go off by it self
Dealing with a similar issue on a Mercedes 906la motor but the pump and metering valve switching valve are exactly the same.
Spn 4334-18
Replace pump and metering valve and flushed lines still no luck going to check voltage at pump I know I have 24v there on 1 pin need to check the other. Also I did have oil in air line so going to check that line.
Would a "practical fix" for the oil problem be to install one of those painters oil/air separators between the limiter and the pump? Route the hoses to make the cup a "drain trap", and just drain it every Friday, or a similar interval?
That could certainly help! If you decide to try it, I'd love to know how it works out.
That is the only screen on the pump or there are another on def lines???
yes it’s work I change my new def pump code active then I change inside small filter run park regen after 5min code active again then I change inside valve from old def pump make sure the way you push out valve same direction you push to new def pump then run park regen 45 min regen is complete and you good to goooooo.
how long can I drive the truck if I have this code?
Now what about your def pressure limiter that controls
Do you provide DEF related services? If so, would like to visit shop if one available.
Hi there, i watched your video many time and these codes are on and off with me for the past 6 months (EEC 61/4334/07 and 4375/06) and finally i decided to fix it on my Cascadia 2014. I have no mechanical background at all, so i was a little worrisome ... So i went under the truck and unscrewed everything as you shown on video. I had everything ready, new Switch from Dealer according to my VIN number. And then it was a little surprise!!! When i puled out the Old Switch, it was half the size of the new one. It was shorter and there was small circular rubber back side wall on it. The face of the switch looks the same though....So like you said, DEF start leaking out and i took a tool and try to gently clean the socket to make sure its clean. And it was super clean, no Oil no Crystals no nothing. I quickly inspected the small (Old) Switch that i pulled out and it looked like new, clean and not blocked at all. I blew some air through it, washed it a bit and placed it back. Just in case i changed the air fitting and screwed everything back together. Then i took apart Metering Unite and cleaned it as well and mounted it back to the One Box. I stared a truck and drove for about 30 min but codes did not go away :( . I talked to some local mechanics and some of them offer to delete the whole DEF System. They scared me a bit because we are talking about 15k/20k repair, and i was hoping to rich out to you and maybe we could talk? Please let me know what do you think and if its possible to get in touch with you about my situation, if you don't mind. In any case i wanted to thank you for your videos. they help alot to understand what is what, especially for some one like me with no Trucking Mechanical Experience. Best regards
Even if the issue was repaired, the MIL light will not go out immediately on its own. Each fault has specific conditions that must be met before the ECU gives it a Pass/Fail. It sometimes also needs to see this over multiple drive cycles before it will turn off the MIL. Like I've said in past videos, I tend to cover the more common problems but there are many others that can occur. Hopefully yours has been solved and the MIL will be going out soon.
Did you ever get your lights to turn off?
This was a year ago. Your reply was a bit late))
This is happening to me on a Monday-8 cxu Mack truck.
The code on my DD16 is SPN 4355- FMI 5, can I get some help on how to get closer to the problem? Thanks
+patinoboxx That code is signaling that DEF line heater #2 is reading an open circuit. The heating element that runs through the line may have failed or there may be a broken wire in the harness between the line and the ACM. You can check for an ohm reading through the line. You should also have battery voltage on one pin from the harness and between 2.25 and 2.75 volts on the other.
Hi, What values or parameters do you select towards end of the video to check air pressure graph?
Coast Xpress, Inc. DEF Air Pressure, DEF Pressure and DEF Pump Current (mA). These are all values read from the ACM.
Gr8 video, Do you provide more advance training on diagnostic link?
Can you tell what's code rec 61 son 4358 fail 03 I try to look it up but did not found nothing
+Mariano Covarrubias There is a problem either with the Metering Unit heater or the wiring for it.
TheDieseler ok thank you
additionally, if the pump cuts on and off, on and off every 2-3 seconds the diaphragm may have a pin hole or for any other reason lost its pressure. remove the hex cap on the bottom and push in 45-50 psi of nitrogen. put a drop of spit on your finger and put it over the shrader valve and see if it bubbles. also if the psv has rust particles in the screen that is coming from rust in the air tanks. you need to address why the air dryer is allowing water to the air system. new air tanks, blow out lines and lots of valves. drain those air tanks every opportunity,
I have 3 code 5246 and under it it has 16 and 15 and 00 can you tell me what does it mean I'm broke down
Mariano Covarrubias These are regulatory/derate faults. They are not the cause of the problem. They simply become active once the problem has been ignored for too long.
i have this code but i did what you did ..no oil in airlines and filter is clean..its just simply not spraying DEF into one box.. ive had a full bar of def in just about 2000miles, what do you think it could be ? hope you can help thank you! by the way limiting valve has been replaced and the air valve that sits under the cab in the chassis
The harness
Currently my problem too.. My DEF gauge has been full for 2500+ miles..
Wath was the solution to fix your truck how do you corrected??
Thank you for you explanations of DEF systems. I repair Fire Apparatus and I have been having issues with them lately. Can you tell me the part number for the Pneumatic Switching Valve you mentioned at 2:38 in the video? The local Detroit dealer told me it was unavailable.
I used a random Engine Serial number for an EPA10 DD15 and got these numbers. They should work but it's always best to give the dealer your VIN/ESN just to make sure you're getting the right info.
The Filter number is A0001400594 and the Pneumatic Switching Valve number is A0001420019
Thank you. I tried another dealer, and they found it in a service bulletin, gave me the same part number as you did (we run EPA10 DD13) The Pneumatic Switching Valve did not correct my current issue, Pressure Limiting Valve (S9750090040) did. I didn't think it would have failed already, as I just put a new one on this unit 2 months ago. There was a lot of water that came out of the inlet though, I wonder if that damaged it.
Mike Castro The water probably did contribute to it. Glad to hear you got it sorted out.
What if I'm getting no pressure??? #PleaseHelp
Pneumatic switch valve part# A000 142 00 19
God bless you for posting the part#
Hey how you doing buddy I got code 4374 fmi 0 I did the def/doser kit that came with all new screens, rubber gaskets, def filter and a new valve for the pump and everything was running well then 2 days later this light came on
And I almost forgot it’s not sucking any more def fluid the tank is still full after a week of driving
It can be quite a few different issues but there's a couple of quick things you can do. First make sure all of your DEF lines are in good shape. Not pinched or kinked anywhere. Remove the supply line to the doser on the exhaust. Place it in a container of water and start the truck or, if you're able, run the ADS self check with DDDL. The DEF pump should run. Watch the container and make sure no bubbles are coming out of the line. If there are bubbles, the pump is sucking air on the inlet side. Make sure your pump electrical connections are clean and tight and have a good look at the doser connections and wiring leading to it. The DEF pressure sensor is built in the dosing unit and it's very common for the wires to chafe and corrode near the plug.
Could you explain code EEC 61 and eng 1 come on ?
EEC61 and ENG1 are not fault codes. They are simply identifiers. It's your Instrument cluster telling you that the Aftertreatment Controler and Engine are each broadcasting at least one fault code.
@@TheDieseler how long can you run before it's a must that you fix the EEC 61 issue?
Yes but I lost throttle and no power on truck these are the code 5246 fail 16 ,15 and 00 the 00 is affecting my throttle please help
+Mariano Covarrubias there are more codes than what you're seeing. Those are derate codes. You're most likely locked to 5mph. There are other problems that need to be addressed.
There's another code rec 061 spn001761 fail 03 could that be affecting my throttle
Again, there's nothing wrong with your throttle. The engine is derated and with no other info to go on, other than what looks like a fault code here, I would say there's a problem with the DEF tank Level/Temp sensor or the associated wiring.
What is the best way to get to that area without having underground access?
I always just use a rolling "creeper". Getting under some of these trucks can be pretty tight these days.
Wes Gagarin I made myself 2 ramps out of pressure-treated 2X10s. (8 ft long). Bought 4, cut 2 in half then added a 3 ft section then a 2 ft section on top of each to form ramps. I use them routinely to change oil, filter and grease. Just be sure to chock your drives when you are under truck. Cheers.
is 004364 is that caused by the same thing
It can be. That fault can be caused by a number of things.
I have this system just nothing but problems!!
C Quinn delete
Very good. I just want to know if you can help me I have code EEC 61 SPN 4335 FMI 1. check engine light is on local shop says I need to replace Air compressor, DEF limiting pressure valve etc. Please let me know if you help me with that. Thanks.
That code indicates that the ACM is not reading Air Pressure at the DEF metering unit. What they're recommending is possible. The air compressor could be failing and filling the system with oil. I would have them verify that there is in fact black engine oil getting into the DEF air components (I rarely see this). It should also be present in the truck's air tanks if this is the case. If the oil does not look like engine oil but does look more like the oil you see in this video then you do not need a compressor. The "Oil" will actually be melted grease migrating out of the Pressure limiting Valve.
Not reading air pressure at the Metering Unit can mean the Limiting Valve has failed or it can mean that the Metering unit is getting plugged up. If the valve is sending air pressure to the Metering Unit then the metering unit may just need to be disassembled and cleaned. The inlet screen or Diffuser Heater inside could be plugged.
@@TheDieseler i have eec 61 spn 4335 fail 1 fault 4 pleace
bro are you a diagnostic specialist?
Honestly, I'm just a technician that tries to be more than just a parts replacer.
@@TheDieseler youre a badass bro
In 2021, you can't buy the pneumatic switch. You have to buy the whole pump. Don't ask me how I know.
Totally agree