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Thread: 2018 RAM 2500 - No Early Throttle Response?

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    Grizzy's Avatar

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    2018 RAM 2500 - No Early Throttle Response?

    I bought a 2018 a few months ago and have had issues with the throttle ever since.

    I threw the throttle % monitor on my MM3, and I had no throttle response until I got over 13% on the throttle.

    It’s the same regardless of whether I’m taking off from a stop, slightly rolling, or letting off on the interstate and getting on it again.

    I tried a pedal commander, and it made no difference.

    Any help?


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    Watch Dog! Corkey's Avatar

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    2018 RAM 2500 - No Early Throttle Response?

    If no codes are set, I would think it might be the TPS "throttle position sensor."

    https://www.genosgarage.com/product/...gine-sensors-3

    Have you scanned the truck for any codes?

    II 60HP STICKS, II 33% CP3, II S464 2ND GEN SWAP, FASS 165 TITANIUM SIGNATURE SERIES, AFE INTAKE HORN, S&B FILTER, 5" TURBO BACK, ALPHAREX HEAD LIGHTS, 38X13.5X20 RAZOR M/T, MOTO METAL RIMS, 6" LA LIFT KIT, COMPLET MM3 KIT, BUILT TRANSMISSION, 6 BOLT REDHEAD STEERING BOX

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    Grizzy's Avatar

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    2018 RAM 2500 - No Early Throttle Response?

    Quote Originally Posted by Corkey View Post
    If no codes are set, I would think it might be the TPS "throttle position sensor."

    https://www.genosgarage.com/product/...gine-sensors-3

    Have you scanned the truck for any codes?
    Yes, I have; no codes are set.


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    Watch Dog! Corkey's Avatar

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    2018 RAM 2500 - No Early Throttle Response?

    @AK Bob

    Do you happen to have a PDF on the sensor for diagnosing?

    II 60HP STICKS, II 33% CP3, II S464 2ND GEN SWAP, FASS 165 TITANIUM SIGNATURE SERIES, AFE INTAKE HORN, S&B FILTER, 5" TURBO BACK, ALPHAREX HEAD LIGHTS, 38X13.5X20 RAZOR M/T, MOTO METAL RIMS, 6" LA LIFT KIT, COMPLET MM3 KIT, BUILT TRANSMISSION, 6 BOLT REDHEAD STEERING BOX

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  9. Top Of Page | #5
    Watch Dog! Corkey's Avatar

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    2018 RAM 2500 - No Early Throttle Response?

    Before replacing the accelerator pedal, follow the fault code diagnostic procedures in the service manual.

    Make sure to check the wiring and connectors.

    P2122 and P2127 will be set if the accelerator pedal connector is disconnected during diagnosis.

    Make sure codes are active before replacing the pedal.

    A two-footed driver usually causes DTC P2299, and the accelerator pedal should not be replaced for this fault.

    II 60HP STICKS, II 33% CP3, II S464 2ND GEN SWAP, FASS 165 TITANIUM SIGNATURE SERIES, AFE INTAKE HORN, S&B FILTER, 5" TURBO BACK, ALPHAREX HEAD LIGHTS, 38X13.5X20 RAZOR M/T, MOTO METAL RIMS, 6" LA LIFT KIT, COMPLET MM3 KIT, BUILT TRANSMISSION, 6 BOLT REDHEAD STEERING BOX

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  11. Top Of Page | #6
    Grizzy's Avatar

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    2018 RAM 2500 - No Early Throttle Response?

    Quote Originally Posted by Corkey View Post
    @AK Bob

    Do you happen to have a PDF on the sensor for diagnosing?
    I do not.


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  13. Top Of Page | #7
    Grizzy's Avatar

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    2018 RAM 2500 - No Early Throttle Response?

    Quote Originally Posted by Corkey View Post
    Before replacing the accelerator pedal, follow the fault code diagnostic procedures in the service manual.

    Make sure to check the wiring and connectors.

    P2122 and P2127 will be set if the accelerator pedal connector is disconnected during diagnosis.

    Make sure codes are active before replacing the pedal.

    A two-footed driver usually causes DTC P2299, and the accelerator pedal should not be replaced for this fault.
    I disconnected my pedal commander to remove any other possibilities, and the issue remains.

    Good connections, but still no codes.


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    I WILL STAND! AK Bob's Avatar

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    2018 RAM 2500 - No Early Throttle Response?

    Quote Originally Posted by Corkey View Post
    @AK Bob

    Do you happen to have a PDF on the sensor for diagnosing?
    It sounds like a dead spot on the Accelerator Pedal Position Sensor (APPS) but strange no codes are being set.

    I have attached all the information for all the APPS trouble codes.

    Attached Files Attached Files
    2014 RAM 3500 (Aisin) 3.73 4X4 Limited Crew Cab Long Bed DRW. Oil Bypass Filter, Fuel Filtration Kit, Cold Air Intake, City Diesel Actuator and 50 Gallon Aux Fuel Tank.

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  17. Top Of Page | #9
    I WILL STAND! AK Bob's Avatar

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    2018 RAM 2500 - No Early Throttle Response?

    Attached are the APPS Operation, Description, and removal information.

    Attached Files Attached Files
    2014 RAM 3500 (Aisin) 3.73 4X4 Limited Crew Cab Long Bed DRW. Oil Bypass Filter, Fuel Filtration Kit, Cold Air Intake, City Diesel Actuator and 50 Gallon Aux Fuel Tank.

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  19. Top Of Page | #10
    Grizzy's Avatar

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    2018 RAM 2500 - No Early Throttle Response?

    Quote Originally Posted by AK Bob View Post
    Do you happen to have a PDF on the sensor for diagnosing?
    Thank you.

    I have access to a known good APPS, so I’ll swap it after work to see if that’s the issue.


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