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Patrick Wong
Last Activity:
Nov 16, 2024 at 12:54 AM
Joined:
Mar 8, 2008
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Location:
Green Valley, AZ
Occupation:
Pricing management

Patrick Wong

DIY Enthusiast, Male, from Green Valley, AZ

Maybe you have some residual air trapped in the engine cylinder head? Nov 2, 2021

Patrick Wong was last seen:
Nov 16, 2024 at 12:54 AM
    1. aswaat
      aswaat
      hi Patrick you help med with my Prius in the past. I am again facing some issues.
      2013 Prius Plug in with 125K miles. changed thermostat and placed in maintenance mode ever since keep displaying check hybrid system stop at safe place. seems like something got lose or something during the repair causing the warning
      1. Patrick Wong
        Patrick Wong
        I just noticed this message. Maybe there is some air remaining in the engine coolant loop, causing the engine to overheat?
        Oct 19, 2024
    2. alanf52
      alanf52
      Hey I saw a post that you commented on the difference between the 2 battery sizes of the Gen 2 Prius. The bigger battery, the S46B24R, was for the smart option and the other smaller battery, the S34B20R, was for the regular Prius.

      I by accident bought the bigger battery, the S46B24R, and installed it in the regular Prius.
      1. alanf52
        alanf52
        It doesn't fit perfectly and may be a little bit loose but I was still able to connect it and it seems to be working because I've driven the car around.

        Is this a problem what I did and will it cause any issues to the car?
        Jul 14, 2024
      2. Patrick Wong
        Patrick Wong
        I recommend that you purchase the 12V battery bracket intended for the Smart-equipped Prius so that the battery doesn't wobble around. If you can secure the battery mechanically, you will be good to go.
        Jul 18, 2024
    3. Figster10
      Figster10
      I was told you could help out with Gen 2 issue c2301, 40, 10 and 581 transmission ecu. I've done everything just not swap the transmission and I've gone through all of the mentions in this forum. I was told you mentioned about a bad ground or loose wire on the ecu a few years back. Thanks in advance
      1. Patrick Wong
        Patrick Wong
        I didn't notice this post until now. The shift control actuator assembly (which engages the transaxle parking pawl) might need to be replaced, which is much easier than replacing the transaxle.

        Test the shift control actuator by removing three bolts that secure it to the transaxle. Slightly move the actuator away from the transaxle case while rotating it.
        Jul 18, 2024
      2. Patrick Wong
        Patrick Wong
        If the actuator rotates smoothly then it is OK and you would replace the transmission control ECU. Consult the repair manual which you can obtain at techinfo.toyota.com
        Jul 18, 2024
    4. Figster10
      Figster10
      I was told you could help out with Gen 2 issue c2301, 40, 10 and 581 transmission ecu. I've done everything just not swap the transmission and I've gone through all of the mentions in this forum. I was told you mentioned about a bad ground or loose wire on the ecu a few years back. Thanks in advance
    5. Prius RT
    6. priuslyfe
      priuslyfe
    7. bigblock67
      bigblock67
      Hi , I saw a post you had for a gen1 no start. Had same issue ,
      runs for 7 seconds dies. Put in neutral and is idles but rough. Main battery is low but now runs rough in park but is running, on couple cylinders Not sure what’s goin on. I’m going to let it run hopefully charge the main up
      1. Patrick Wong
        Patrick Wong
        My guess is that the high voltage traction battery has one or more dead cells, hence the battery needs to be replaced. I suggest you retrieve the diagnostic trouble codes to see if engine misfire is being reported and if so, what cylinders are affected. How many miles since the iridium spark plugs were replaced?
        Apr 21, 2023
    8. eximage
      eximage
      Hi Patrick
      Been a fan of yours for a long time.
      Good to see you are still active and solving our problems.
      While replacing the heat control valve, about 3 qt of coolant leaked out( i think from the very bottom hose}
      In attempting to pour the coolant back into the radiator directly, it only took about a pint-no more.
      What are the steps to get more in?
      much appreciated for your help.

      Pete
      1. Meg&Bear likes this.
      2. Patrick Wong
        Patrick Wong
        Pete, get a coolant funnel which will allow the coolant level to be above the radiator thus exerting a bit of pressure. Run the engine continuously until the thermostat opens and allows more coolant to enter.
        Jun 3, 2022
        Meg&Bear and Malari like this.
    9. Dbasra99
      Dbasra99
      Hello Patrick, I was wondering if you could help me with a U0293 error caused by a short on my 2012 Prius Plug In.
    10. Patrick Wong
      Patrick Wong
      Maybe you have some residual air trapped in the engine cylinder head?
      1. jbhancy likes this.
    11. Shahsafi
      Shahsafi
      Hello Patrick, recent I have replace my prius v 2012 engine, all was well but I noticed the coolant heat sign is on, plz help me
    12. johnnychimpo
      johnnychimpo
      here are the codes
      DTC
      U0293
      UO100
      U0101
      U0151
      U0164
      U0293
      1. Patrick Wong
        Patrick Wong
        The various DTC indicate that the ECUs cannot communicate with each other. Might be a broken wire in the wiring harness or a failed ECU. Recommend you obtain factory repair manual info at techinfo.toyota.com. This may not be very easy to resolve.
        Feb 27, 2021
        Meg&Bear likes this.
    13. johnnychimpo
      johnnychimpo
      I suspect the spark from the coils may have arced and fried the computer. I barely know how to use techstream but here is what I got, I hope you would be kind enough to provide some guidance as to how to tackle this. If It is the ECM can I just replace it or do I need to program it?
    14. johnnychimpo
      johnnychimpo
      Hello I see you have a bit experience with tech stream. long story short. my engine has bent rod I will be replacing it its a 2010.
      in the process of putting it together I rolled it off the roll up ramps and it started but soon died.
      as engine grounds were not connected and it had no plugs and coils were dangling on the side.
    15. prius8654
      prius8654
      Hi Patrick, as you know you are an valuable resource on Prius Chat. You have helped me before. I have a quick one this time: I want to buy a VCI dongle that will allow me to use Techstream with my Toyotas (I have a Sienna and a Prius). There are way too many to choose from on Amazon, do you have a brand / vendor you can recommend (or maybe a link to one that it legit)?
      1. Patrick Wong
        Patrick Wong
        Yes, there are several Amazon vendors. I bought my Mini VCI a very long time ago and do not have a vendor to recommend. Amazon has pretty good return policies, so I suggest you buy from a US vendor (if you want to reduce shipping time) and hope for the best. Good luck with your choice.
        Feb 13, 2021
    16. March
      March
      I’m wondering if the financial outlay ( at least $2000 ) makes sense given the age and miles of the car . The fact that the hybrid battery and AC are pretty recent make me lean toward making the repairs
      1. Malari likes this.
      2. Patrick Wong
        Patrick Wong
        Yes, I understand your position. I hope that will be the end of needed repairs for a while.
        Jan 31, 2019
    17. March
      March
      Hi Patrick ,
      Please advise on my 2006 Prius . It has 128,000 miles and needs a new brake actuator and left axle cv boot . .
      In 2016 , I replaced the hybrid battery with a new one and replaced the AC .In 2018 I bought new Michelin tires and had brake pads replaced .

      A new actuator is $1200 .. the cv boot part is $75 or cv axle and boot kit $528 .Labor at a non dealer hybrid repair is $109 an hour .
      1. Patrick Wong
        Patrick Wong
        What advice are you expecting?
        Jan 30, 2019
        Malari likes this.
    18. Peter Senich
      Peter Senich
      Hello Patrick,
      Can you offer any advice or tips on how to separate the CHS water pump electrical connector on a 2006 Prius? Thank you. Peter
    19. Peter Fanelli
      Peter Fanelli
      Hi Patrick, I see your name come up a lot and hope you might be able to advise me. I recently had an inverter pump fail on my 05, pump has been replaced, am2 fuse replaced and car now operates again except that the a/c doesn't work. is there a procedure to restore power to the a/c after the inverter has shut it down?
      1. Patrick Wong
        Patrick Wong
        There is no such procedure. Did the A/C work correctly prior to the inverter pump failure? Does the cabin fan work?
        Jun 17, 2018
        ATIQ likes this.
    20. JIM777
      JIM777
      Hi Patrick I was reading some of your post to a fella that had a code problem POA A6 and attached to it was the 526 code as you troubleshoot it you were looking for another code mine also has the 612 code is wondering if you might be able to help me determine what that is thanks have a great day
      1. Todd Greeneway likes this.
      2. Patrick Wong
        Patrick Wong
        P0AA6, info code 612 means the ground fault is within the traction battery. Look for a leaking battery module first.
        Aug 15, 2017
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  • About

    Gender:
    Male
    Location:
    Green Valley, AZ
    Occupation:
    Pricing management
    Vehicle:
    2015 Prius
    Model:
    Two
    Grew up in Honolulu, HI. Attended college and graduate school in CA, work in tech industry.

    Signature

    2015 Prius
    2014 BMW X3 xDrive35i
    2007 Prius
    2007 Jaguar XK
    2006 Highlander Hybrid 4WD-i (sold Mar. 2020, 109K miles)
    2004 Prius (sold Feb. 2017, 231K miles)
    2001 Prius (sold Feb. 2008, 75K miles)