Recurrent Power Failure After HV Battery Replacement - help!

Car just died AGAIN after replacement of the 12V, going on the highway at 42mpg. Had a full tank of gas (well, I drove 16 miles on a full tank before it conked out). Have had the car back for less than a week.

Aye! Having it towed to a different dealer this time to get a diagnostic. Am running out now to check the throttle body and MAF sensor before the tow truck comes. Anything else I can/should check out in order to arm myself before another dealer looks at it?

 

I've cleaned the throttle body and MAF sensor before - would I not be able to tell by inspecting them whether they were gunked up (and thus possibly causing the problem?) Forgive my naivete on this, but I'm trying to learn.

Don't have a code reader but will consider getting one (not that it seems to matter much yet so far). Will see if the new dealer pulls a different code...

 

Thanks friendly_jacek, I'm working on it! Ed, attached are pics of the warning lights that came on: red triangle, yellow check engine, and yellow exclamation point on the dash (turn signal is on from me pulling over), plus the red exclamation point on the upper left corner of the digital display. Car was traveling fine then suddenly - no warning of any kind - felt resistance in the accelerator pedal and that the car was 80% unresponsive to my foot on the gas - I'd say probably 10 seconds later all the lights came on and the car was fully unresponsive. From there I coasted and managed to exit an off-ramp.

Once the car came to a full stop on the surface street, I put it in park, let it sit for a minute, then put it in drive and tried to accelerate again - nothing. I powered the car off, sat for a minute, turned the car back on - the lights came on again (except for the yelow exclamation point). I put the car in drive and it did work, weakly! I managed to drive the 3/4 of a mile home at 15 mph.

I'd driven 100 miles since picking it up from the dealer a week ago, and, unlike what I posted in my first response, did not feel any sluggishness driving her at any point in the intervening week. Silly me, though that meant maybe we had gotten to the bottom of it!

Car is at a new dealer now. Will post codes when I get them. And just fyi, here's a brief recap of problems to date:

Prior to 2/14/14, car working great! Have replaced tires twice and water pump. Otherwise, no probs.
2/14: 120, 843 miles - Car gives red triangle without notice or change in performance while driving on streets. Bring it into Marina del Rey (MDR) Toyota. HV battery needs to be replaced. They repair it and return it to me on 2/18.
2/20: traveling on highway at 52 mph, car suddenly loses power. Gas gauge at 3 pips. Have it towed to MDR. They pull code P3190 and assess it as out of gas. Fill car with 7.65 gallons of gas and it works. Off I go. Car gives a little resistance when acceleraing at highway speeds from this point on.
5/11: traveling on highway at 50 mph, car suddenly loses power. Gas gauge at 3 pips. I pull into a Chevron and refill with 7.2 gallons. After refilling, performance is back to normal, lights go off after 15 minutes. Did not return to dealer b/c I figure I am a dope and let the gas get too low.
6/24: 125K service at independent mechanic
8/15: traveling on highway at 50 mph, car suddenly loses power. Gas gauge at 7 pips. Have it towed to MDR. They pull code P3190, C2318, C2300 and assess the problem as 12 volt battery and replace it. Car performance no longer sluggish.
8/26: traveling on highway at 42 mph, car suddenly loses power. Gas gauge full. Have it towed to new dealer.

Awaiting diagnosis now...

 

Update!

Brought my car into North Hollywood Toyota (new dealer!) Wed morning 8/27. They pulled codes:

P3190
P0A0F

The dealer told me they found oil build-up in the intake manifold, and they needed to clean the intake manifold, throttle body, fuel injectors and spark plugs, which seemed consistent with what some of you suggested on this thread and my previous thread. I greenlit the fix and picked up car on Friday morning and seemed to work fine.

Cut to: just now (7pm on Sunday 8/31). Have driven my car about 30 miles since I picked it up from the dealer. I start my car as usual (foot on the brake, power button) and new problem: the check engine light flashes on quickly, power light temporarily goes orange and then dark, and now no other dash lights come on. The consumption screen shows the battery is full for what it's worth. I power off the car, power it on - same deal. It will, however, drive! (not that I can see whether I'm in drive or neutral), but it's very sluggish. A still of the dash is below (it's all dark - but the car is actually on) and I posted a video of my drive home which will be online shortly - link at bottom of post - (yes, I live literally a block away from the coffee shop where I was parked - don't make fun - it's LA). While the gas gauge is not visible, gas should be at or near full (I filled up the tank before the car died on 8/26 - drove 16 miles that day and prob another 30 since, so should only have eaten into the supply by a gallon).

Frustrated does not begin to describe how I feel. I plan to call the dealer (again) and corporate (again) on Tuesday, but with no way to make it out to labor day festivities and some time to kill, what else can/should I check? I'm not afraid to run diagnostics and open the hood, but I am a newbie, so if anyone has some suggestions as to what I can check, please let me know (and feel free to point me to other threads). Am planning to check the 12 volt, and manually inspect the oil, throttle body, MAF sensor. Will also be purchasing a code reader as per SageBrush's recommendation. Anything else?

I'll continue tooling around the forum for other ideas too. Many thanks in advance.

P.S. This vehicle was purchased NEW in '05 from Marina del Rey Toyota, and at the very least I've been a maniac about regular maintenance every 5K, and have logged every time I've filled up the car with gas. Up until this Feb when the HV battery was replaced, I've had zero performance problems with the car. I'll note that when the red light came on back in Feb, I first took it into my independent shop and they pulled codes P3000 and P0A80; these codes were confirmed when I brought it into the dealer and they wrote the following in their notes:

H.V. battery block #7 is weak
890111...T-1;8A...T-2;73
Replace H.V. battery and transfer all parts

At the time they also recommended I service the cooling fan, which I did to the tune of $230.

That was a long P.S. Let me know what else I can tell you about the car!

youtu.be/_BubREOTEOY

 

Haha, thanks for that.

The car has been at North Hollywood Toyota going on 2 days. Just listened to a message from the service rep who said that Toyota wanted him to order a fuel relay and so they're waiting on that but "in all honesty, I really don't know what's happening to your car."

Yikes!