Cat was just stolen and now brakes aren’t working

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by DanaB716, May 23, 2023.

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  1. DanaB716

    DanaB716 New Member

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    2009 Prius
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    ----USA----
    My cat was stolen two weeks ago :(
    I haven’t replaced it yet since they are expensive in California. I had a local muffler shop install a straight pipe to get my through this decision making process. The downstream o2 sensor has been removed but I’m having electrical issues (hence my apprehension on buying a new cat) EFI fuse has blown three times and now the brakes aren’t working and the ABS, VSC lights are on but the car is throwing some weird codes that aren’t just about the brakes.

    C1256, B1412, B1443, C2122, C2123, C2124

    I'm assuming there's some kind of connection to the cat being stolen and some kind of electrical issue and not the actual braking system? But what relay or fuses should I check?

    Any advice would be appreciated
     
    #1 DanaB716, May 23, 2023
  2. SFO

    SFO Senior Member

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    Welcome to PriusChat!!
    Not sure which obd2 device or app you're using (many aren't compatible), but would you like for me to use the Pchat search feature (working again) to retrieve those obd2 codes (aka DTCs). and corresponding step by step factory workups for you, or can you manage it alone?
    Best to isolate those downstream o2 sensor electrical leads from one another, and see if something changes. Usually that blows an ECU.

    FYI : you're moderated until you've posted 5 times.
     
    #2 SFO, May 24, 2023
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  3. DanaB716

    DanaB716 New Member

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    2009 Prius
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    ----USA----
    Thank you! These codes came from a tire and brake shop as my obdii reader is too basic and wouldn’t pull these. If you have the time to assist that would be appreciated.
     
    #3 DanaB716, May 24, 2023
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  4. SFO

    SFO Senior Member

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    Sure thing, or no problem. Below are the step by step workups for the posted obd2 codes (DTCs).

    Here is the workup for DTC C1256 : https://share.qclt.com/%E4%B8%B0%E7%94%B0%E6%99%AE%E7%91%9E%E6%96%AF%E5%8E%9F%E5%8E%82%E8%8B%B1%E6%96%87%E6%89%8B%E5%86%8Cpdf%E6%A0%BC%E5%BC%8F/Repair%20Manual/04pruisr/05/21avn/cic12565.pdf

    Here is the workup for DTC B1412 : https://share.qclt.com/%E4%B8%B0%E7%94%B0%E6%99%AE%E7%91%9E%E6%96%AF%E5%8E%9F%E5%8E%82%E8%8B%B1%E6%96%87%E6%89%8B%E5%86%8Cpdf%E6%A0%BC%E5%BC%8F/Repair%20Manual/04pruisr/05/2044g/cib14121.pdf

    Here is the workup for DTC B1443 : https://share.qclt.com/%E4%B8%B0%E7%94%B0%E6%99%AE%E7%91%9E%E6%96%AF%E5%8E%9F%E5%8E%82%E8%8B%B1%E6%96%87%E6%89%8B%E5%86%8Cpdf%E6%A0%BC%E5%BC%8F/repair%20manual/04pruisr/05/2044g/cib14333.pdf

    Here is the workup for DTC C2122 : It would appear that a TPMS sensor has given up the ghost (how many miles are on the vehicle?)

    Here is the workup for DTC C2123 : It would appear that a TPMS sensor has given up the ghost (how many miles are on the vehicle?)

    Here is the workup for DTC C2124 : It would appear that a TPMS sensor has given up the ghost (how many miles are on the vehicle?)
     
    #4 SFO, May 25, 2023
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