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P0037 P0101 P0420 P1150

Discussion in 'Gen 2 Prius Main Forum' started by Tboy160, Oct 13, 2022.

  1. Tboy160

    Tboy160 Junior Member

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    Apologize if this post isn't in the right place, I don't fully understand the website layout.
    2009 293,000
    Someone stole my cat back in March, replaced cat with bolt in cat from Rock Auto (WALKER 16337) and O2 sensor (DENSO 2344623)
    Yesterday 10/12/2022 my check engine light came on.
    Codes
    P0037
    P0101
    P0420
    P1150
    These All came up!
    I started reading about these codes and man is there a lot to read.
    Would all or most of these be related to one issue?
    Its been 8 months since i installed the new Cat and O2, seems if either was a problem it would have come up before now?
    Any help is greatly appreciated.
    Dickless cowards stole my wife's Cat the same night. She has a 2008
     
    #1 Tboy160, Oct 13, 2022
  2. bisco

    bisco cookie crumbler

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    don't know, maybe check the sensor wiring and make sure there are no exhaust leaks?
     
    #2 bisco, Oct 13, 2022
  3. mr_guy_mann

    mr_guy_mann Senior Member

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    Technically, each of theses codes should turn on the check engine light by itself... AND, if one or two of these codes are set, then the others shouldn't be able to set.

    You need the MAF sensor (P0101) and the downstream O2 sensor heater (P0037) working properly (ie, no codes) before the ECM can determine that it has a problem with the cat (P0420).

    That said, if the car & ICE run properly, you might want to clear codes and see if/what comes back first.

    The P1150 is for a problem with the Coolant Heat Storage Tank system.

    Posted via the PriusChat mobile app.
     
    #3 mr_guy_mann, Oct 13, 2022
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  4. Tboy160

    Tboy160 Junior Member

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    The check engine light went off the next day.
     
    #4 Tboy160, Oct 15, 2022
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  5. Tboy160

    Tboy160 Junior Member

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    In regards to exhaust leaks, I mean, the new cat just came with a clamp, doesn't seem like it would be the best at sealing?
    The check engine light went off the following day and back on the following day...

    In regards to it not being on then ALL 4 of these codes at once....seems crazy!
    I've read that we should only use Toyota O2 sensors, should I replace the one I installed with a Toyota one?
    I do need to go read the codes again, now that the check engine light toggled on and off...
     
    #5 Tboy160, Oct 18, 2022
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  6. bisco

    bisco cookie crumbler

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    probably a good idea, i have read that as well. is denso not oem?
     
    #6 bisco, Oct 18, 2022
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  7. Tboy160

    Tboy160 Junior Member

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    Replaced the mass air flow sensor and eventually check engine light went away, been off for months now.
     
    #7 Tboy160, Aug 23, 2023
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