Need mechanic in Texas. Codes p0a40, p0a41

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by Fern1461, Dec 17, 2019.

  1. Fern1461

    Fern1461 Junior Member

    Joined:
    Oct 3, 2018
    14
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    Location:
    Houston, Texas
    Vehicle:
    2007 Prius
    Model:
    ----USA----
    I need Houston, TX Prius mechanic. I got codes p0a40, p0a41. And transmission is revving but not locking into wheels. I pray it's just a bad wire harness. 2007, 82,000 miles. Please assist. Thanks!
     
    #1 Fern1461, Dec 17, 2019
  2. Fern1461

    Fern1461 Junior Member

    Joined:
    Oct 3, 2018
    14
    5
    0
    Location:
    Houston, Texas
    Vehicle:
    2007 Prius
    Model:
    ----USA----
    Update. Thank you for awesome tips members have provided. I gently ( brittle plastic! ) disconnected M9 connector. I sprayed & allowed to dry metal contact points with Electronics /Mass Air Flow cleaner. Did this 3-4 times. Reconnected. No more codes now for ~11 months.
     
    #2 Fern1461, Feb 3, 2021
    Priusdriver06 and RobAustin like this.
  3. Priusdriver06

    Priusdriver06 Junior Member

    Joined:
    Apr 11, 2024
    11
    0
    0
    Location:
    USA
    Vehicle:
    2006 Prius
    Model:
    N/A

    Thanks for the follow up on this code. I had bad wiring on the M10 connector and checked out the ohms on the M9 connector as well and fixed those as well as some weren't getting the correct ohms. My P0A40 and P0A41 eventually went away over time but it was over a span of a couple of weeks or so but now I'm stuck with a P0A2D code. I wonder if this is also part of the harness on the transmission or connector. I will try again to take off both connectors and check for ohms and clean the connectors to see if this goes away
     
    #3 Priusdriver06, Feb 3, 2026 at 4:14 PM
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