2006 Prius - Error codes: P0301/P0302/P0303/P0304

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by atineb, Sep 3, 2014.

  1. atineb

    atineb New Member

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    147324 Miles. I took it to Toyota for a diagnostic and the error codes are reading cylinder misfire. They said that they want to change the spark plugs, ignition coils, and do a compression test for a total of approx $800. They said after the compression test, they will be able to say if the engine is bad. They also said that there was no coolant in my car. Am I suppose to be adding this to the car often?

    Any advice?

    Should I go through with this at Toyota or take it to a mechanic to just change the sparks and ignition coils
     
    #1 atineb, Sep 3, 2014
    Last edited: Sep 3, 2014
  2. bisco

    bisco cookie crumbler

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    wow! :eek: almost a million and a half miles? you should retire it to the toyota museum!(y)
     
    #2 bisco, Sep 3, 2014
  3. FazilHussein

    FazilHussein Member

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    No, coolant loop is sealed.....I'd check the ICE waterpump; it will weep when it's worn out. Look for pink stains around the waterpump.

    I'd deal with the coolant leak first to see if it's contributing to the misfire.

    Faz
     
    #3 FazilHussein, Sep 3, 2014
  4. nh7o

    nh7o Off grid since 1980

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    Often, no. It is something that needs to be checked regularly, just as with every car. Look for signs of leaking around the engine coolant pump shaft (pink deposits). First thing to do is get the coolant back in the system, and make sure the pump is OK.
    Any mechanic can change the plugs. They are overdue for replacement. If that does not fix things, then look into changing the ignitors.
     
    #4 nh7o, Sep 3, 2014
  5. atineb

    atineb New Member

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    Haha oops. Edited
     
    #5 atineb, Sep 3, 2014
  6. bisco

    bisco cookie crumbler

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    dang!:p might be cheaper to save the $800. and have a mechanic throw in a salvaged ice.
     
    #6 bisco, Sep 3, 2014
  7. Patrick Wong

    Patrick Wong DIY Enthusiast

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    If your engine coolant was low then the engine was probably damaged permanently. You should confirm whether this is the case by having the compression test done first, prior to replacing the spark plugs and ignition coils. There is no point in replacing those parts if the engine is dead.

    In case you didn't get the message yet, you need to periodically check the engine coolant level at the radiator and look for antifreeze leaking at the engine coolant pump. For that matter all engine compartment fluids need to be checked regularly.
     
    #7 Patrick Wong, Sep 3, 2014
  8. Paul Schenck

    Paul Schenck Active Member

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    Glad not everyone has a 300,000 flawless performance out of their Prius engine. I saw a replacement engine on eBay for $600


    iPhone ?
     
    #8 Paul Schenck, Sep 3, 2014
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