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2006 Tundra, V8, No Acceleration, Fault Codes P0453, P1441, & P2440

Discussion in 'General Tundra Discussion' started by RobRig, Mar 13, 2021.

  1. Mar 13, 2021 at 5:49 AM
    #1
    RobRig

    RobRig [OP] New Member

    Joined:
    Mar 13, 2021
    Member:
    #60353
    Messages:
    1
    First Name:
    Rob
    Vehicle:
    2006 Tundra Crew Cab 4x4
    Thought I'd share with the group a problem I recently had with my 2006 Tundra, V8 Crew Cab 4x4.
    GF was driving the truck, suddenly one afternoon it would not get above 30 mph, had to limp home. I checked it the following weekend and verified the problem.
    Scanned for codes and then cleared the codes. Codes were P0453 (Evap Canister press high) which had been there for years and I ignored, plus P1441 and P2440 (Secondary Air). I assumed they were all emissions related BS.
    After I cleared the codes the truck ran fine. I left it as a one-off "WTF was that?".
    Next weekend problem reappeared.
    I found that when the pedal was put to the floor the RPMs would not go above 4000, it seemed to me that I had a throttle related problem where maybe the electronic throttle control system was acting up, maybe a bad pedal potentiometer, throttle body sensor, or wiring issue.
    Using a copy of the FSM that I pulled from a Google Drive link posted in one of the Tundra Forums I found that the P1441 and P2440 Secondary Air Fail codes were generating the lack of power, Codes put the engine in a fail-safe mode and limited the throttle to limp-mode.
    Using the FSM I was able to troubleshoot to a bad Secondary Air Switching Valve on Bank 1 (left side).
    Access required pulling the intake manifold. Replacing the valve cost about $90 from Amazon plus $20 for two silicone intake gaskets.
    I also found the source of my P0453 Code; wire INSIDE the plastic conduit was broken above the gas tank, enroute between the fuel pump/ evap canister at the tank and a connector under the driver's seat. The harness conduit wasn't damaged at all, wire just failed in the harness. This job required pulling the seat and un-routing the harness off the frame to eventually get enough slack to get the harness over the tank out far enough to find and fix the break.
    FSM also had a great troubleshooting procedure to check voltages at the pump end of the connector.
    PDF version of the FSM was great, I could use "CTRL+F" and search for all instances of each code in the approx 5000 page document, only issue was checking to see if the code and associated text was in the V6 or V8 engine section. Can get going the wrong way if you're not careful.
    Anyway, thought I'd share. I'm adding a link to a YouTube video I made for the Secondary Air Codes.
    It's about 40 minutes and shows all the steps per FSM for troubleshooting the problem.
    https://youtu.be/AexcFsZM6eo
     

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