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P0301 code with check engine light on

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by Abu Rais, Nov 7, 2017.

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  1. Abu Rais

    Abu Rais Member

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    This afternoon car was shacking a lot and feels like it's going to stop with vibrations on the engine. Check engine light came on. I took it to Autozone it's the code P0301 Cylinder 1 misfire detected.

    I got all the parts to install the OCC but didn't get a chance to install it.

    What can I do?
    Autozone said I need a new coil pack for cylinder 1
    Please help.
     
    #1 Abu Rais, Nov 7, 2017
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  2. NutzAboutBolts

    NutzAboutBolts Senior Member

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    Erase the code, swap out ignition pack with a different cylinder, recheck if its still misfiring on cylinder 1. If not, then its the ignition pack, If it is, swap out the spark plugs and see if it still cause misfire on the same cylinder. If not, then its the spark plugs, if it is, then need to check further in the process.
     
    #2 NutzAboutBolts, Nov 7, 2017
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  3. Abu Rais

    Abu Rais Member

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    How can you erase the code?
     
    #3 Abu Rais, Nov 7, 2017
  4. JC91006

    JC91006 Senior Member

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    p0301 does not mean it's the coil, just tells you there's a misfire. You would need to rule out the easy stuff, plugs and ignition coil, fuel injector. Hope it's not what many of these turd gen cars face.........a bad head gasket.
     
    #4 JC91006, Nov 7, 2017
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  5. NutzAboutBolts

    NutzAboutBolts Senior Member

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    yup, those 3 basic components.
     
    #5 NutzAboutBolts, Nov 7, 2017
  6. Abu Rais

    Abu Rais Member

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    What are the signs For bad head gasket?
     
    #6 Abu Rais, Nov 7, 2017
  7. danlatu

    danlatu Senior Member

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    Misfire can be caused by a fouled plug, dirty injector, coolant or oil in cylinder. Look at the plug, it is it wet and oily or dry and caked with carbon? Please post a pic of spark plug #1. Look inside the cylinder with the spark plug off. Is it wet oily black or watery/pink coolant sitting on the piston? I would also pull the injector to see if it has carbon covering the tips preventing a good fog/spray. How many miles on the the odometer? Egr system, pcv system and intake manifold need to be cleaned. Could have a blown head gasket. Mine was on cylinder #1 and had a bent rod. A bad coil is possible but I doubt it. All you have to do is swap coils with 1 and 2.

    Erase your code by pulling the white cable in your fuse box for 10 min and plug back in for restart. You will also have to pull the windshield cowl to pull the spark plugs.
    Screen Shot 2017-11-07 at 6.09.58 PM.png
     
    #7 danlatu, Nov 7, 2017
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  8. danlatu

    danlatu Senior Member

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    Loss of coolant
    Screen Shot 2017-11-07 at 6.41.08 PM.png
     
    #8 danlatu, Nov 7, 2017
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  9. Abu Rais

    Abu Rais Member

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    You mean the White cable looks like a cat5 cable inside the green circle you drew.
     
    #9 Abu Rais, Nov 7, 2017
  10. Abu Rais

    Abu Rais Member

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    Just took the picture. I drove the car around 100 miles after the knock.
    I can see still some engine coolant in the reservoir.
     

    Attached Files:

    #10 Abu Rais, Nov 7, 2017
  11. danlatu

    danlatu Senior Member

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    Coolant can also mix in with your oil, also known as puking.
    Yes white cable. You have to compress the clip and pull. A little thicker than cat5. Watch your coolant level, it looks to be at a good level. If your plugs are wet oil fouled and oil is found in your intake plenum, I would install an oil catch can.
     
    #11 danlatu, Nov 7, 2017
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  12. Abu Rais

    Abu Rais Member

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    It's my wish. Any Prius expert wanna visit to Houston. I will take care of the ticket. Without this car I can't drive for work. What a mess I am in.
     
    #12 Abu Rais, Nov 7, 2017
  13. bisco

    bisco cookie crumbler

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    contact hometown hybrids, and ask if they recommend anyone local.
     
    #13 bisco, Nov 7, 2017
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  14. Abu Rais

    Abu Rais Member

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    Which one is the cylinder one? is it from the driver side the first one or from the passenger side the first one?
     
    #14 Abu Rais, Nov 8, 2017
  15. NutzAboutBolts

    NutzAboutBolts Senior Member

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    firing order is 1-3-4-2, 1 is on the passenger side.
     
    #15 NutzAboutBolts, Nov 8, 2017
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  16. Abu Rais

    Abu Rais Member

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    Thanks a lot
     
    #16 Abu Rais, Nov 8, 2017
  17. Abu Rais

    Abu Rais Member

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    One more quick question to swap the ignition coil 1 do I need to remove the wiper assembly as you shown on the video for spark plugs?
     
    #17 Abu Rais, Nov 8, 2017
  18. NutzAboutBolts

    NutzAboutBolts Senior Member

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    Yes. Just leave it off while doing your testing.
     
    #18 NutzAboutBolts, Nov 8, 2017
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  19. AzWxGuy

    AzWxGuy Weather Guy

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    Can't help but notice, what is the brake reservoir doing over on the passenger side? Is this an EU right-hand drive model?

    Huh, the picture didn't quote. It's post #8, above.
     
    #19 AzWxGuy, Nov 8, 2017
  20. Abu Rais

    Abu Rais Member

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    Update:
    Today morning I drove the car to Autozone and experienced the same knock on the way there. So I bought a Lucas injector cleaner and put it on the gas tank. Then I also lear the check engine light. Drove 130 miles after that and car is on for past 5 hours. So far didn't experience any knock and the check engine light didn't come back either.

    Tomorrow morning will do all the maintenance work and see what happens down the road.
     
    #20 Abu Rais, Nov 8, 2017
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