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Routine maintenance ?

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by Brian Adcock, Jul 31, 2024 at 3:26 PM.

  1. Brian Adcock

    Brian Adcock Junior Member

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    I replaced my plugs, PCB valve, cleaned MAF sensor and throttle body today.

    Afterwards I took it for a spin. The triangle of death warning came on. I went to O'Reilly's and had it scanned. He said misfires on 3 and 4. He cleared the codes and says if they come back that I should replace the coils.

    So far no codes. I attached a photo of the old plugs. The previous owner had the wrong plugs. I researched and found that Denso SK16R11 is the correct plugs. That is what I installed.

    What do you all think? True misfires? Correct plugs? It was my first time doing some preemptive maintenance.


    Brian in central NC
     

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    #1 Brian Adcock, Jul 31, 2024 at 3:26 PM
  2. TMR-JWAP

    TMR-JWAP Senior Member

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    Yes, the SK16R11 plugs are correct for the gen 2. There's always equivalents available, tho.

    That being said, I always use the R11s and they have been flawless. The only concern would be where you purchased them and whether they are chinese counterfeits or actual DENSOs. Amazon and eBay are flooded with counterfeits and are lucky to get 20k miles, much less the OEM rated 120k.
     
    #2 TMR-JWAP, Jul 31, 2024 at 3:50 PM
  3. Brian Adcock

    Brian Adcock Junior Member

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    How can you tell a counterfeit?

    The plugs Installed said Denso SK16R11.


    Think my warning light was from disturbing the undisturbed?
     
    #3 Brian Adcock, Jul 31, 2024 at 3:55 PM
  4. ColoradoBoo

    ColoradoBoo Senior Member

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    Hard to say...I assume you disconnected the negative battery terminal on your 12-volt battery before the job? (You would need to since cleaning out the throttle body requires the on-board computer to recalibrate the settings for the internal air flow.)
     
    #4 ColoradoBoo, Jul 31, 2024 at 6:15 PM
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