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Jeremy
Jeremy, Certified Truck/Bus Technician
Category: Medium and Heavy Trucks
Satisfied Customers: 2784
Experience:  ASE Med/HD Truck Technician, NATEF Diesel Engines and Electrical/Electronics Technician, EPA 608/609 HVAC Certified, Steering/Suspension and ABS/Brakes Technician
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VOLVO D13 2013 VIN#DN133763 i beleive its vnl670. has fault

Customer Question

VOLVO D13 2013 VIN#DN133763 i beleive its vnl670 . has fault codes as follows,...SPN 4752 FMI 7,,,,SPN 412 FMI 5,,,, SPN 412 FMI 15...PLUS ITS NOT DEFLATING AIR BAGS ALL AIR BAGS ARE EMPTY AND HEIGHT CONTROL SEEMS TO BE IN GOOD CONDITION. ANY HELP. ON THE AIR BAGS ISSUE AND THE CHECK ENGINE LIGHT. ?
Submitted: 4 months ago.
Category: Medium and Heavy Trucks
Expert:  Jeremy replied 4 months ago.

My name is ***** ***** I will assist you with your question today.

I'm an independent contractor and I don't get paid until a rating has been made.

We can go back and forth as needed to help resolve the issue you are having. Follow ups are free after ratings, so rate in confidence!

SPN 4752 FMI 7 is EGR Cooler Efficiency code. The EGR cooler is plugged or damaged. Careful for if you do clean the cooler or replace it and the code doesn't clear, the front valve can cause this. However, the cooler is the fault 95% of the time.

SPN 412 FMI 5 EGR Temp high. Sever Level. This is related to the cooler.

SPN 412 FMI 15 EGR Temp high, least severe level. Again, due to the cooler.

On the air bags, see if you are getting power to the dump valve from the switch when you change the switch over. You didn't write a code for it so I'm presuming the switch is good and the signal is being sent. The issue will be in the air valve/electrical solenoid for the air bag dump.

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Jeremy

Customer: replied 4 months ago.
I fixed the air issue. But for egr do I have to replace it ? I don't have computer software for volvo I have worked on Cummins b4.
Customer: replied 4 months ago.
It has only 370k miles
Expert:  Jeremy replied 4 months ago.

It's not the EGR, it is the cooler. The cooler is most likely plugged and causing the EGR to get too hot.

I would flush it at a radiator shop or replace it. If you see coolant in it, replace it.

Expert:  Jeremy replied 4 months ago.

You don;t need a computer hook up for the EGR cooler.

Customer: replied 4 months ago.
Mileage is pretty low for it to go bad? Is it like Cummins cooler lol?
Expert:  Jeremy replied 4 months ago.

Similar to the cummins cooler. This one has 2 EGR valves on it. You'll see it on the right side of the engine.

I've seen them crack at 50k miles and plug up in the low 100s several times, so no on the mileage.

Customer: replied 4 months ago.
How would I tell if I need to replace it. Truck not loosing any coolant yet no debate either just check engine light is on for these codes
Expert:  Jeremy replied 4 months ago.

It's plugged and causing overheating. It may not be cracked to burn coolant, but it's plugged and not letting the gas go through the internal fins and cooling the gases down.

Problem is if you run it for awhile with it not cooling the gases, it will burn the EGR valve and eventually crack as well.

Right now I think it just needs to be pulled off and flushed out at a radiator shop. That will unplug the fins. It's no different than a plugged radiator.

Customer: replied 4 months ago.
Can I just wash it off with pressure washer ?
Expert:  Jeremy replied 4 months ago.

No, you have to flush it internally with a acid wash that will eat away the soot built up from the gases. The fins are internal.

CLICK HERE

This isn't your engine, but if you scroll to the 2nd picture, you'll get an idea of how the coolant flows in the EGR cooler to keep the gases cool. It operates similar to a oil cooler where it is a bunch of tubes with the coolant pipng that all run parallel to each other.

Customer: replied 4 months ago.
I called few shops here in Sacramento no one would clean it. They said they only replace . One guy said if cooler is plugged it needs to be tested why it's getting plugged he said my egr valve might be bad or causing it to get excessive soot etc. Can you explain
Expert:  Jeremy replied 4 months ago.

That is true that the valve can cause more soot, but it's not always a bad valve. Bad fuel can cause excess soot as well. Ask your local radiator shop to clean it. Mine can clean them by dipping them in a aluminum safe acid wash which breaks the soot down.

Customer: replied 4 months ago.
Can you list step by step if possible with images to how to remove it looks pretty simple but I think turbo has to come off to take it off ? Please advise
Expert:  Jeremy replied 4 months ago.

Remove the EGR Valve and then you remove the clamps to remove the cooler, then you can pull it off.

CLICK HERE

Don't forget to rate above, please? thanks.

Customer: replied 4 months ago.
It says invalid pdf file ?
Expert:  Jeremy replied 4 months ago.

I just checked it and someone else here just checked it. We both are not having any issues and we are 2 separate IPs. Something on your end is blocking it.

Customer: replied 4 months ago.
I got it but this engine looks like have different setup I don't believe it'll come out without removing turbo ? See picture
Expert:  Jeremy replied 4 months ago.

You can remove it without removing the turbo. It is just a PITA to do so. Turbo is easy to remove. Just remove the 4 bolts that hold it on after taking the intake hose clap, exhaust, and hoses/wires off. Then undo the clamps for the cooler, the bolts on the front for the valve, then remove.

Customer: replied 4 months ago.
After cleaning n installing cleaned egr cooler I have these faults 4375 fmi 14 and 4752 fmi 7
Customer: replied 4 months ago.
Also screeching sound is coming from turbo side when I drive and accelerate same when deaclerating idling doesn't do that. ?
Expert:  Jeremy replied 4 months ago.

Did you have anyhting come loose and get into the turbo? It sounds like something got into the turbo to be causing that or a plugged oil line...

Customer: replied 4 months ago.
I didn't do it I had local small shop do it for me. But that sound wasn't there. Especially at high speed it's not the right turbo sound nothing looks loose . I'll have them check oil line too. What else can they check or test ? And why that egr cooler active fault not going away ?
Customer: replied 4 months ago.
It was broken clamp fixed it . But code still there with check engine light on.4752 fmi 7
Expert:  Jeremy replied 4 months ago.

It sound like they messed up the repair.

I can't tell what to do on the next step without looking at the truck because I can't hear the noise.

If you still have the code, you could have a bad EGR or now a damaged turbo, but there should be a EGR code or a turbo code with it on this engine.

Something wasn't done right ifthere is noise. Possibly a nut fell in or something else.

Customer: replied 4 months ago.
Noise is gone it was broken clamp behind turbo on exhaust port . But the egr cooler efficiency code still active no other code
Customer: replied 4 months ago.
There are no sensors that can cause this?
Expert:  Jeremy replied 4 months ago.

Sorry for getting back late. I was in the hospital a few days.

The 4752 can only be from the cooler or the EGR. They are the only 2 causes for it. The sensor is the EGR valve sensor and the Delta P. They work together for this code.

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