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Advise - Gen 2, Dealer says needs Hybrid Computer, maybe battery

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by CarlB, May 14, 2020.

  1. CarlB

    CarlB Junior Member

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    That may have to be the way we go. Daughter says might be able to see Starbucks security footage, her friend works there.
     
  2. strawbrad

    strawbrad http://minnesotahybridbatteries.com

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    There have been way too many stolen converters in MN lately. I have heard of about a dozen. Last month I got a call from a small repair shop that had replaced a stolen cat and then the car turned into a non responsive brick. I don't know if they managed to track down that gremlin. So, I have seen a stolen cat disable a Prius but do not know what the fix was. One theory was that cutting the O2 sensor wire could short the two wires for the heater in the sensor. That might lead to blown fuses and confused computers.

    Does anyone know what else is running on the O2 sensor fuse?

    What shop is the Prius at?
     
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  3. CarlB

    CarlB Junior Member

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    I have it with Stew at The Foreign Service. It was unluckily bad timing. As part of the job I was going to have him put a cat-guard in ...
     
  4. SFO

    SFO Senior Member

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  5. strawbrad

    strawbrad http://minnesotahybridbatteries.com

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    I know Stew will be able to get to the bottom of this mystery. Let him know it has one of my batteries in it. He knows me.

    I think the cat converter theft caused the problems with the car. It did not happen after the fact. Not too impressed with the dealer not noticing a missing cat, but they had no reason to put the car on a lift and if the car didn't start you would not hear the open exhaust.

    What happened to your car matches what I saw with the other bricked Prius. It's cat was stolen, driven to a local repair shop, moved in and out out a couple of times while waiting on insurance and parts. After a new cat was installed the car bricked and refused to start. They thought that maybe the car had been running on battery only. It looked like the HV battery was drained so we tried swapping in another battery with no change. They were going to further trouble shoot the cut O2 sensor wire.

    The O2 sensor cable that was cut contains four wires. Two run a heater and two are for the sensor output. One wire from each circuit connect to the engine ECU. It's possible that the cutting the O2 sensor cable mashed some of the wires together creating a short. That could lead to blown fuses or let the magic blue smoke out of the engine ECU.

    The Covid-19 shutdown has caused large price drops in scrap metal Prices. OEM Prius converters had been selling for $400 or more as scrap. They are now under $100. Aftermarket Prius converts sell for about $5 as scrap. I would not bother with a Cat Guard for an aftermarket cat.
     
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  6. CarlB

    CarlB Junior Member

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    Stew, my daughter, and I were able to talk today. Had to get her Prius off the dealer lot, and we had worked out for him to take the car in today, although technically he wasn't open. Was great of him to do, very much appreciated. So, he's up to speed with the converter situation, the fail codes and wiring notes from the dealer, and the traction pack being from your service. Lots to sift-through, but based on your note about the O2 sensor wiring going to the engine ECU, there's a definite chance too that's partially fried. (Couldn't be totally fried, or wouldn't have reported the dealer's fail codes?)

    Focusing back to Thursday, my daughter drove the car from her apartment complex parking lot to a Starbucks, which turned out to be not open and empty lot. No notice of loud exhaust on that trip, so guessing converter was still there. But there were dash errors during her drive over, so something was up. Then when she tried starting the car at the Starbucks, it would no longer shift into drive.

    Needing to get to work, she called an Uber, best we can figure is the car sat in the empty parking lot from about 9:30am to half-past-noon, and unless I'm mistaken that she would be able to hear a missing converter, the theft occurred in those three hours.

    I'll talk with her about it tomorrow, we'll call in the theft report with our best guess at where and when it occurred. Monday, we'll get back in touch with Stew (perhaps early afternoon if he hasn't already called), and see what he's coming up with. And get in touch with the insurance company. They're not going to be happy, in the fall my son's 1999 Honda Civic was stolen (another theft), trashed, and had to be totaled. Stew's seeing some insurance companies are playing hardball: put the cheap converter aftermarket in, or total the vehicle.

    With 180k miles on it, not a spring chicken. But it's a Prius - it could likely go another 100k or more if fixed properly. Totalled, they probably won't offer what one like that could be purchased for... Tough decisions and likely tough pocketbook-hits coming up.
     
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  7. CarlB

    CarlB Junior Member

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    Car is totalled, according to the insurance adjuster. Counting prior damage to the front of vehicle, sides, and hail, high mileage, against its best-shape, low-mileage value. Car was reliable, would have gone for years more. But totalled according to the adjuster due to body work that hadn't been done. So won't pay out for the stolen cat and related repairs.

    Only two options as they value the vehicle a total loss. Can take $330 and keep the car, or surrender the car and get $2387. Not happy with my insurance company.

    Car itself? Real problems were diagnosed by Stew at The Foreign Service. (Dealer was off on a wild goose chase of codes and misdiagnoses of traction battery ECU and/or traction battery). 12V battery fail caused the no-start. Converter was stolen while car sat (9:30AM to half-past noon) waiting for tow, or at the dealers. Dealer claims wasn't while they had it Thursday night or Friday night, and I can't prove that. Mashed O2 sensor wires from a cut/mangle caused a blown fuse to the engine ECU.

    Immediate repairs would be: Cat, O2 sensor, wiring, 12V battery. Would have used an aftermarket converter to keep costs down. Further fixes would have been needed for brakes, suspension. Would have added up, along with body work (to get the car looking good).

    At this point, thinking of surrendering the car, put the $2387 against another Gen 2 Prius ... About the same out-of-pocket to get the existing Prius up-to-similar-snuff, given that insurance would only pay-out $330 if I kept it.

    Some sunk costs too, of course - extra towing ($120), dealer misdiagnosis ($150).

    Ugh. Expensive 12V battery fail. Next time - make sure daughter knows to get it towed to the good independent repair shop. Not the dealers.

    And thanks to Stew at The Foreign Service for really helping me out on this one, and Brad at Minnesota Hybrid Batteries for the concern and willingness to stand behind your battery!
     
    #27 CarlB, May 20, 2020
    Last edited: May 20, 2020
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