i have a P0A08 and P3108 code ???

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by esdras29, Aug 20, 2011.

  1. esdras29

    esdras29 best prius

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    I have a 2006 prius with 129,000 miles,,i was driving to work in the moring and the hybrid system light came on.so after work went to a friends house to check the code and it has 2 codes.... First one is p0a08 and the second code p3108. Before this happend 2 months ago it had the same problem, a/c stop blowing cold .park my car for a 3 hours. And every thing was back to normal...but this time light is on and no a/c.......
     
    #1 esdras29, Aug 20, 2011
  2. firepa63

    firepa63 Former Prius Owner

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    Have you had the inverter coolant pump replaced? It's a recall item.
     
    #2 firepa63, Aug 20, 2011
  3. esdras29

    esdras29 best prius

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    yes they just replaced it 4 month ago..
     
    #3 esdras29, Aug 20, 2011
  4. firepa63

    firepa63 Former Prius Owner

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    DTC P0A08/264 DC/DC CONVERTER STATUS CIRCUIT
    The HV control ECU monitors the DC/DC converter circuit status via the NODD terminal. If the ECU detects an internal circuit malfunction in the converter and stops converter operation with its fail-safe function, causing the auxiliary battery voltage to drop below 11 V, the ECU outputs DTC P0A08/286.

    DTC P3108 LOST COMMUNICATION WITH A/C SYSTEM CONTROL MODULE
     
    #4 firepa63, Aug 20, 2011
  5. 2009Prius

    2009Prius A Wimpy DIYer

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    I would check the inverter coolant reservoir for proper fluid level and movement (pump should work when IG-ON). Also check the health of the 12V battery.
     
    #5 2009Prius, Aug 20, 2011
  6. esdras29

    esdras29 best prius

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    i tested the aux battery and its @ 12.5 volts and with the car on its @ 13.7 volts...

    Am thinking its the p3108 code thats making the p0a08 go one safe mode. Car drives normal ...only the a/c not blowing cold and i see that the cruise control is not working also..



    checked its ok .thinking its the a/c module ..its 544 @ dealer but maybe goin to buy one from salvage yard with low miles for $45.00 just to make sure test it.
     
    #6 esdras29, Aug 20, 2011
    Last edited by a moderator: Mar 25, 2020
  7. edthefox5

    edthefox5 Senior Member

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    Before you buy anything replace the Inverter coolant your self. Its really really easy and you can make sure there's no air lock which is probably whats happening.

    You can prove this by investing $30 in an IR Thermometer at Home Depot.
    Drive the car in the heat of day for 10 miles then get out and take the invert case temp and the temp of the Inverter coolant tank.

    Post back.

    There's 3 steps. Your missing a step. That's 12.5 not under load. Whats it at under load in acc.
     
    #7 edthefox5, Aug 20, 2011
    Last edited by a moderator: Mar 25, 2020
  8. esdras29

    esdras29 best prius

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    sorry took for ever to right back for a update,,i fix my problem i just bought a used inverter from ebay from wrecking yard that only had 46,000 miles on it...
    best part it took me 3 hrs to remove and install and all my warning light turn off ..a\c and cruise control works again....
     
    #8 esdras29, Dec 4, 2011
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  9. Manfred Vargas

    Manfred Vargas New Member

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    A few days ago I made the change of electric motor (converter / inverter) and also I have changed the coolant pump, everything has been fine for a few days, however I have started the p1121 again and within 5 minutes of walking I was They have turned on all the lights, giving the p0a08-264 that I see that you also had that problem, I do not know if you managed to fix it by changing the fusibe # 5, or if you made any other modification and that the vehicle already walks normal without problem ... any help right now would be great.

    The p3108-535 also turned on, which is loss of communication with the control module of the air conditioning system, I have changed the 4-way cable that goes between the car's o2 sensor and the engine and I do not know if that could have been done that code come out, not being the correct cable for the vehicle.

    Thanks for the help
     
    #9 Manfred Vargas, Mar 24, 2020
    Last edited by a moderator: Mar 25, 2020
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