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2005 prius throwing code p1121 is this the 3 way valve or throttle position sensor?

Discussion in 'Gen 2 Prius Main Forum' started by Prius Rising, Mar 31, 2019.

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  1. SFO

    SFO Senior Member

    Joined:
    Feb 7, 2017
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    Location:
    Northern California
    Vehicle:
    2007 Prius
    Model:
    N/A
    Occasionally I have a hard stumble on engine shut down, though rarely. Thinking once a month or so. Will have to keep track now.

    Also been having issues with the pending cat code, it comes and goes and now is being thrown more often again. Thinking I will give a new upstream sensor a shot.

    Where was that accelerator pedal sensor knowledge found?
    Have you replaced either the upstream or downstream sensor, and did you use the Denso sensors?
     
    #21 SFO, Apr 21, 2019
    PriusPaddler, Prius Rising and Raytheeagle like this.
  2. Paul Schenck

    Paul Schenck Active Member

    Joined:
    Jun 15, 2013
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    Location:
    Fresno, California
    Vehicle:
    2005 Prius
    Model:
    II
    I did replace the downstream sensor I’ll check the brand


    iPhone ?
     
    #22 Paul Schenck, Apr 25, 2019
    PriusPaddler and SFO like this.
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