Submerged MAP sensor, replace?

Discussion in 'Prius v Care, Maintenance and Troubleshooting' started by logbiter, Oct 19, 2025.

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  1. logbiter

    logbiter Junior Member

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    So, new to me V w/ ~153k miles. Since I’m furloughed right now, tackling cleaning the EGR & manifold.
    I missed taking off the exhaust manifold MAP sensor (oops! I was still kinda numb after the hassles of removing the EGR cooler ) and it was submerged in degreaser solution for a few hours. Should I replace it??


    Also going to change the plugs, replace water pump, both coolants (seems to have been done around 100k) & tranny fluid.
    I wasn’t sure about the inverter water pump… my ‘05s went out ~170k miles, a year ago. It gave me plenty of warning, so I’m not stressing it right now. Also plan to do a brake bleed. Some brake work was done ~30k miles ago according to carfax. Aside from regular oil changes and rear hubs done recently, carfax doesn’t show any of the work I’m doing.
    thanks!!!
     

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    #1 logbiter, Oct 19, 2025
  2. ChapmanF

    ChapmanF Senior Member

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    Do you have a scan tool that can show the MAP reading?

    Does it match your local weather station's barometer reading when the engine is off, and go down to something near 4 kPa when the engine is idling?

    If so, it'd seem to be still doing its job.
     
    #2 ChapmanF, Oct 19, 2025
    Brian1954 likes this.
  3. logbiter

    logbiter Junior Member

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    II
    I’ll fire up my old version of techstream, & see if can check it. Thanks
     
    #3 logbiter, Oct 20, 2025
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