2013 CT200h w/ Rebuilt Battery. P0A0F/P3191 Codes. Check Hybrid System. Need Help

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by LexCT200H, Mar 8, 2025 at 3:16 PM.

  1. LexCT200H

    LexCT200H New Member

    Joined:
    Saturday
    3
    0
    0
    Location:
    Houston
    Vehicle:
    2013 Prius
    Model:
    Five
    Thanks for the great explanation! I am having many issues and not to sure what to do next. Recently rebuilt hybrid battery. Have P0A0F and P3191. It also has coolant in oil and “Check Hybrid System.” What would you recommend I do next? Replace head gasket or clean mass flow, egr etc first? Would greatly appreciate your help on this. Thank You!
     
    #1 LexCT200H, Mar 8, 2025 at 3:16 PM
    Last edited by a moderator: Mar 10, 2025 at 6:41 PM
  2. Brian1954

    Brian1954 Senior Member

    Joined:
    Jan 31, 2021
    1,496
    577
    0
    Location:
    South Central PA, USA
    Vehicle:
    2011 Prius
    Model:
    III
    Buy a different car to replace your car. Do not put any money into your car that needs an engine replacement and a hybrid battery replacement, and who knows how much more.
     
    #2 Brian1954, Mar 8, 2025 at 7:15 PM
    Last edited: Mar 8, 2025 at 7:34 PM
    LexCT200H likes this.
  3. LexCT200H

    LexCT200H New Member

    Joined:
    Saturday
    3
    0
    0
    Location:
    Houston
    Vehicle:
    2013 Prius
    Model:
    Five
    Thank you for your wise sugesstions. However the situation is slightly different. I have recently already rebuilt Hybrid battery and is fine now. The car is 2013 Lexus CT200H with around 155K miles. I recently purchased it for around $4500 not knowing such severe issues. Hence, I will not be able to sell it at it's current state. I am willing to spend another couple thousand just to get it running and decide whether to keep it or sell it. Currently with the issues described (car does not start, P0A0F, P3191, coolant in oil, and “Check Hybrid System”), I just wanted to get some pointers on what next DIY I can do to keep cost under $2K? I thought about head gasket sealant as my next option, but can't do that because engine does not run. Cleaning Mass flow, EGR etc could be next step, but again there looks to be head gasket issues since there is coolant in oil. Maybe head gasket replacement is the best option, although it involves too much work. What would you do if you were trying to fix the car? Please guide me a little. Thanks again for your help!
     
  4. LexCT200H

    LexCT200H New Member

    Joined:
    Saturday
    3
    0
    0
    Location:
    Houston
    Vehicle:
    2013 Prius
    Model:
    Five
    Hi @Mendel Leisk : I need some guidance. Please help! The car is 2013 Lexus CT200H with around 155K miles. I recently purchased it for around $4500 not knowing such severe issues. Hence, I will not be able to sell it at it's current state. I am willing to spend another couple thousand just to get it running and decide whether to keep it or sell it. I have recently already rebuilt Hybrid battery and is fine now. Currently issues are: car does not start, P0A0F, P3191, coolant in oil, and “Check Hybrid System”, I just wanted to get some pointers on what next DIY I can do to keep cost under $2K? I thought about head gasket sealant as my next option, but can't do that because engine does not run. Cleaning Mass flow, EGR etc could be next step, but again there looks to be head gasket issues since there is coolant in oil. Maybe head gasket replacement is the best option, although it involves too much work. What would you do if you were trying to fix the car? Please guide me a little. Thanks again for your help!
     
  5. Tombukt2

    Tombukt2 Senior Member

    Joined:
    Nov 29, 2020
    11,163
    1,950
    0
    Location:
    Durham NC
    Vehicle:
    2009 Prius
    Model:
    Base
    So you have coolants in the oil then you know what you have going on. That has to be rectified in this engine it causes an imbalance in the systems and then you get massive rattling from the torque plate springs slamming together because of the bad misfiring because of the water sometimes it clears right up if you step through it when you initially boot the vehicle and some people get away with driving it for months like that You can't have it rattling it'll shake itself to death and put a hole in the side of the motor. So when your world the head and the timing cover is coming off that engine and then the Pistons are brought to the top of their holes and deck height is checked to make sure nothing is stretched or getting weird with the connecting rods If it is the blocks coming out next and then you're looking for an engine or something these open deck design engines I don't recommend you start trying to rebuild them It's a pretty expensive proposition. If you're blocked and deck height and everything check out great all you'll need is the timing set be foolish not to replace it while it's all the part Head gasket and if it was mine I would be sending the head out to a machine shop and have the valves ground and everything cleaned properly or buying a remanufactured head from any of the many remanufactured I think for the two Z is available for around $300 $350 your machine shop bill will be much higher than that so I would probably look into that even going this route to some like me this is expensive proposition for an engine that doesn't seemingly like to hold together like engines in the past that I've owned for many years so I just had to bow out the CT is a very pretty car it's unfortunate that these problems arise with this series of engine I wanted one too but after the persona 13 and the 2010 we knew that that should not be.
     
  6. ASRDogman

    ASRDogman Senior Member

    Joined:
    May 29, 2018
    6,884
    3,626
    0
    Location:
    Florida
    Vehicle:
    2010 Prius
    Model:
    Two
    You need a remanufactured engine, not a rebuilt one.
    Since you say there is coolant in the oil, the head is likely warped.
    Machining it "may" fix it, depending on how bad. You can only safely shave about
    2-3 thousands off it before you risk the pistons and valves touching.
    Unless you risk having 2 head gaskets with metal sheet between them. IF you can find them.
    And you might have a bent connecting rod.... Easy to check that.

    This could be the reason it's not starting.... with coolant in the cylinders...

    P.S. NEVER use the fake head gasket sealer. It doesn't work, it only ruins the heater core,
    radiator, coolant pump, thermostat, and all the small passages.....
    Not even worth trying on this motor.

     
  7. rjparker

    rjparker Tu Humilde Sirviente

    Joined:
    Jun 6, 2008
    9,110
    5,519
    7
    Location:
    Texas Hill Country
    Vehicle:
    2012 Prius v wagon
    Model:
    Three
    Your only hope for $2k is a used engine and that is a big risk. I would consider a used in Japan JDM engine at ~$1200 plus tax but that leaves very little for installation unless you have a really good friend at a shop with experience swapping engines and he is willing to help you.
     
  8. MAX2

    MAX2 Active Member

    Joined:
    Aug 12, 2024
    790
    232
    46
    Location:
    Third planet from the Sun
    Vehicle:
    2007 Prius
    Model:
    N/A
    After several starts, your high-voltage battery is discharged.

    I believe that to solve the first issue, you need to charge the high-voltage battery.

    Are you familiar with electricity at a good level or is this just not your thing?