loss of acceleration & display out

Odd, have you tried adjusting the dash lighting level?

The fact that your power/acceleration loss is tied to low HV pack, suggests something is wrong with the Hybrid system. It could be as simple as the electronics overheating, but that would log a fault as would most other hybrid faults.

Many "code readers" do not do a good job of properly interpreting trouble codes for non-emissions systems like those for a hybrid. You indicate the check engine light is on, if you replaced the MAF and the light is still on, there are more faults stored that they did not tell you about. I would start there.

However, you mentioned excessive oil consumption, that can, if due to a worn engine RAPIDLY clog the catalytic converter. when the cat clogs, the exhaust becomes restricted and it's like the engine is running a race but breathing thru a straw - NO GOOD.

 

If the engine has a mechanical problem, the car could be drawing excessive load from the hybrid battery which may be doing okay (for its age). Do you hear the cooling fan in the back seat?

I agree the Autozone scanner isn't getting a big enough picture. See if you can find someone with a Toyota scanner, or get a Mini VCI cable or phone app. Search here for more info. Mini VCI ($20 plus an old 32-bit laptop) will allow you to scan the individual battery module voltages, internal resistances, and heat sensors.

Your display problem may be a well-known issue with the combination meter. Do a search here and you'll see all sorts of information on it. One DIY fix is to remove it yourself (takes several hours and involves the air bags) and send it in for a $100 repair, as found on eBay. But you're probably right, it's a minor issue now compared to the others.

 

check the 12 volt battery to start.

 

Clean the throttle body and then disconnect the 12 Volt battery for a few minutes to reset everything. These engines are notorious for getting very dirty at the intakes and MAF sensors especially on the oil burners . When it gets bad enough they will act like they are out of gas much like you described. Once the engine stops the car will run for a short time on the hybrid battery until it's drained.

If there's anything wrong with the hybrid system you will get the red triangle on the dash and a small warning in top left of the MFD that looks like a car with and exclamation point. Since you didn't mention either I'm figuring your battery and hybrid system are doing ok.

If your combination meter is failing we sell those thru our website. Most of our customers do their own installs in about an hour. If you need anymore information you can message me.

Matt