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What causes Limp Mode?

Discussion in 'Oregon' started by Wooddude, May 16, 2025.

  1. May 16, 2025 at 7:53 PM
    #1
    Wooddude

    #1
    Wooddude [OP] Active Member

    Joined:
    Feb 13, 2023
    Member:
    #417853
    Messages:
    28
    Gender:
    Male
    First Name:
    Dan
    Vehicle:
    2010 Tacoma TRD 4dr 4.0L super charged
    Rough country 6" lift, 14" six piston Big Brake kit with drilled and slotted rotors with rear drum to disc conversion with parking brakes, 35x 12.50 x 22 mud terrain tires & Maverick 22" wheels, Magnuson Supercharger, AMP folding steps, Flowmaster American Thunder dual exhaust stainless steel with series 50 muffler cat back system with shorty headers. Alpha Rex projector head lights with custom tail lights, Buckstop front bumper with Smittybilt 9500LB winch, snugtop canopy, fog lights in front and rear back up leds, aftermarket grill, yellow top battery, volant cold air intake system, bully dog chip, JVC double din stereo with JVL speakers, weather tech floor mats front and rear, custom tow mirrors, Vengence rear bumper custom seat covers, remote start, drone mobile alarm gps system.
    2010 Tacoma, 4.0L with Magnuson super charger.
    ISSUE: When super charger kicks in at 65mph while running in 4th and drive the engine shuts down to limp mode until I stop and reset the ecm then returns back to normal running conditions until I repeat again.
    I never had a problem until first of the year while climbing a steep highway grade after reaching 65 is when I first experienced this issue fyi, the code are reading are PO456
    Update 05 16 2025 replaced MAF, replaced purge valve hose that was cracked and still goes into limp mode when accelerating to 65 mph in 4th and drive mode. Called Magnuson engineer he suggested that there may be a air bubble in the intercooler suggested a vacu-fill that my next step and has anyone experienced limp mode on a 4.0L with a supercharger?
     
    Last edited: Jul 4, 2025
    Wooddude, May 16, 2025
    #1
  2. May 16, 2025 at 8:15 PM
    #2
    hilighter

    #2
    hilighter Master of Disaster

    Joined:
    Apr 12, 2022
    Member:
    #394900
    Messages:
    258
    Gender:
    Male
    Portland, OR
    Vehicle:
    21 Tacoma MGM TRD OR DCSB ABCDEFG
    3” Ironman IM2.5 lift Body Armor stubby front bumper 10k Superwinch Ironman Raid rear bumper Custom sliders Nomad 501 17x8.5 Satin black wheels Smartcap Dashmat
    hilighter, May 16, 2025
    #2

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