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Thread: 2018 RAM 2500 Oil Pressure Sensor

  1. Top Of Page | #21
    DANG IT'S COLD! AK Bob's Avatar

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    Re: 2018 RAM 2500 Oil Pressure Sensor

    Good work, guys; the oil filter relocation kit may be a factor.

    Unfortunately the MM3 does not support a pressure sensor input, just the EGT probe.

    From what I have read, the stock oil pressure sensor is simply a switch, on/off for low-pressure warning.

    If you have the factory oil pressure gage it uses a calculated value generated by the PCM.

    If you want to see the actual oil pressure you could thread a pressure sender or hard line at the 1/8” NPT port on top of the oil filter housing and install a gauge inside the cab.

    2014 RAM 3500 (Aisin) 3.73 4X4 Limited Crew Cab Long Bed DRW. Oil Bypass Filter, Fuel Filtration Kit and 50 Gallon Aux Fuel Tank.

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  3. Top Of Page | #22
    MrRand5's Avatar

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    Re: 2018 RAM 2500 Oil Pressure Sensor

    Quote Originally Posted by Compton View Post
    Yes I have Pacbrake.

    I think we are on to something.

    I never towed with mine with stock oil filter placement so I thought it was something with the truck.

    Are you going to go back to stock by chance?

    If you do let me know the results
    Not the truck, 110,000 miles on mine pulling 25-32000 lbs every day, run like a champ.

    I just had the relocate removed from the truck and am loading up the trailer with a new sensor installed. Will be pulling for 300 miles tonight. I will tell you if I have success or failure.

    For those reading this. Here is what I know so far about these sensors.
    - People will say "I race, much harder on a truck than towing" Bullshit, I tow with my foot to the floor for 10 hours a day. Replicate that in a race. Just because it's "race" proven does not mean it is real-world proven to the limits of these trucks
    - The dealers overtightened these sensors every time they were installed. The next installer would complain about how tight it was and then install the next one even tighter. There is a torque spec for these, they do not need to be ripped on there and will fail if overtightened.
    - They have a plastic end that easily damages in a spot that is tough to install as it is. They need to be really careful when installing.
    - A fairly good chance at this point the Pacbrake oil relocation does something that builds pressure at this sensor and causes it to fail in extreme environments. Not sure if other relocates cause the same issue. I won't be finding out either. I think pass-on bypasses if you have a real working truck that is run heavy.


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  5. Top Of Page | #23
    DANG IT'S COLD! AK Bob's Avatar

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    Re: 2018 RAM 2500 Oil Pressure Sensor

    Quote Originally Posted by MrRand5 View Post
    Not the truck, 110,000 miles on mine pulling 25-32000 lbs every day, run like a champ.

    I just had the relocate removed from the truck and am loading up the trailer with a new sensor installed. Will be pulling for 300 miles tonight. I will tell you if I have success or failure.

    For those reading this. Here is what I know so far about these sensors.
    - People will say "I race, much harder on a truck than towing" Bullshit, I tow with my foot to the floor for 10 hours a day. Replicate that in a race. Just because it's "race" proven does not mean it is real-world proven to the limits of these trucks
    - The dealers overtightened these sensors every time they were installed. The next installer would complain about how tight it was and then install the next one even tighter. There is a torque spec for these, they do not need to be ripped on there and will fail if overtightened.
    - They have a plastic end that easily damages in a spot that is tough to install as it is. They need to be really careful when installing.
    - A fairly good chance at this point the Pacbrake oil relocation does something that builds pressure at this sensor and causes it to fail in extreme environments. Not sure if other relocates cause the same issue. I won't be finding out either. I think pass-on bypasses if you have a real working truck that is run heavy.
    Any update for us?

    2014 RAM 3500 (Aisin) 3.73 4X4 Limited Crew Cab Long Bed DRW. Oil Bypass Filter, Fuel Filtration Kit and 50 Gallon Aux Fuel Tank.

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  7. Top Of Page | #24
    MrRand5's Avatar

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    Re: 2018 RAM 2500 Oil Pressure Sensor

    Quote Originally Posted by AK Bob View Post
    Any update for us?
    Yup, I made it home.

    800 miles through strong winds and storms.

    The truck worked hard the entire way.

    NO ISSUES after I removed the PAC Brake relocation kit.

    After installation, I can confidently say it is a problem with cracked or damaged oil sensors.


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  9. Top Of Page | #25
    MrRand5's Avatar

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    Re: 2018 RAM 2500 Oil Pressure Sensor

    Quote Originally Posted by Compton View Post
    Yes, I have Pacbrake.

    I think we are on to something.

    I never towed mine with stock oil filter placement, so I thought it was something with the truck.

    Are you going to go back to stock by chance?

    If you do, let me know the results.
    Update: I pulled the Pac brake oil relocate kit off.

    No further issues.

    It is undoubtedly causing failed oil pressure sensors under harsh towing conditions.


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  11. Top Of Page | #26
    Compton's Avatar

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    Re: 2018 RAM 2500 Oil Pressure Sensor

    Quote Originally Posted by MrRand5 View Post
    Update: I pulled the Pac brake oil relocate kit off.

    No further issues.

    It is undoubtedly causing failed oil pressure sensors under harsh towing conditions.
    Thanks for the update, brother.

    Will be pulling mine off soon.

    Glad you/we found a solution.

    2018 Ram 2500 Big Horn / 4x4 / CC / 68RFE / 20" Fuel Triton wheels / Toyo RT 37"s / 5" Rough Country Lift / 5" Straight / Studded / CCV Gutted (Reroute) / S&B CAI / Airdog 165 4g II / G&R Sump / Isspro Fuel Pressure gauge (Lift pump) / Isspro Pyrometer / Pacbrake Oil Filter Re-Location / Amp'd Throttle Booster / Raceme Ultra Drd Tunes / Airlift 7500 Bags / B&W Turn Over Ball

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