Medium and Heavy Trucks
I have a Cat C13 Lee15325 I cannot locate the atmospheric pressure sensor. Everything points to the front of the engine
Expert's Assistant chat
Customer: I have a Cat C13 Lee15325 I cannot locate the atmospheric pressure sensor. Everything points to the front of the engine but nothing there
JA: What's the make/model/year of your truck? Engine type?
Customer: 2009 Peterbilt 386 Cat C13 Lee15325
JA: Are you fixing your truck yourself? What have you tried so far?
Customer: I have replaced 3 check valves in the fuel filter housing, replaced all injectors, injector wiring harness, had fuel pressure tested. Im still getting a stumble in the mountains
JA: Anything else you want the Truck Mechanic to know before I connect you?
Customer: The sensor I have is(###) ###-####comes up as a oil pressure sensor Cat said this was the absolute pressure sensor
JA: What's the make/model/year of your truck? Engine type?
Customer: 2009 Peterbilt 386 Cat C13 Lee15325
JA: Are you fixing your truck yourself? What have you tried so far?
Customer: I have replaced 3 check valves in the fuel filter housing, replaced all injectors, injector wiring harness, had fuel pressure tested. Im still getting a stumble in the mountains
JA: Anything else you want the Truck Mechanic to know before I connect you?
Customer: The sensor I have is(###) ###-####comes up as a oil pressure sensor Cat said this was the absolute pressure sensor
Answered by Nich1019 in 4 mins 2 years ago
Nich1019
Auto Mechanic
8,542 satisfied customers
Specialities include: Auto Body Technician, Heavy Equipment Repairs, Heavy Duty Engine Repairs, Brake and Transmission Repairs
Hello and welcome to JustAnswer! I'm Nick and I'll be helping you out today. The atmospheric pressure sensor is also the CGI absolute pressure sensor. I believe it's near the valve cover in the rear on the driver's side on a C13. It will be mounted right next to a differential pressure sensor. I'll see if I can get a good picture for you. Have you tried a boost pressure sensor?
Customer
Where is the boost pressure sensor located?
It's in the intake manifold. I'll get a picture of that too. Just give me a couple of minutes.
Customer
I think I have that with me
Here's a diagram. #6 is the CGI absolute pressure sensor which is used for atmospheric pressure.
Is that the boost pressure sensor? The boost pressure sensor is #3 in the diagram.
Customer
it is I went to move the wire and the top broke off. I already bought the absolute pressure sensor before finding this so trying to at least figure out where that is located
Customer
I don't have any check engine lights and nothing is showing in CAT ET truck runs great until I climb mountains then stutters. Im sure #3 sensor is causing some issues
is the correct number for the CGI absolute pressure sensor. Ok, well that sensor was probably cracked. Hopefully that's your issue.
Customer
Imma replace both and hope it solves my issue. I appreciate you helping me locate these sensors
No problem. Let me know if you're still having issues after you replace the sensors.
Customer
I definitely will again I really appreciate you
Thanks. And thank you for using JustAnswer!
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