Check hybrid system warning after manifold cleaning

Just one leg driving. Flew the other three legs. And it rained almost all the way back. Anyway, OP has a new CEL so back to the topic.

 

It get's easier and easier, everytime you do it eh? You get into a routine. As an example, when I'm taking bolts off the air box and intake snorkel, I've taken to just throwing them in the air box.

I hate that thing. It takes just the right pinch to lock it open, and yeah, it's like a bear trap.

I wonder, if you were taking the throttle body off, if you could just leave that piece on, at least until you've lifted the throttle body out.

 

overall NICE JOB in resolving the issue.
good light-hearted humor gets us through
the problem was Feasible, Acceptable, Simple, Explainable...

i know many non-DIY'ers would have taken it to the stealership & spend some of their hard earned $
i say treat yourself to a tall drink or your car a new airfreshener ; )

BUT
- you have the temprament/attitude to return and do car-things over and over without boredom/frustration; this is the tedium that sends others' to FLIGHT
- agree with Mendel, you are going to get better, quicker at it; make your own short cuts even
- NOW you are getting nearer to visualizing the process/goal in your head prior to project; all making the act smoother and faster

im not a fan of that air box either, but what i dont like MORE are bigger & dumber designs like
- windshield wiper cowel; what is you only wanna get access to sparkplug #2?! or even put a bit more DOT3 fluid in the brake reservior; c'mon
- PCV location
- cabin reverse noise for passengers' situation awareness
- drive shifter access design; Gen2 had it away from the passenger, now kid passengers can knock the shifter or play with the PARKING button or hazard button; we KNOW kids love to play with and put in their moth shiny things like TIDE PODs

bent nose pliers are great... more special purpose tools in the tool kit ; )
if you havent already, consider long-extended needle nose pliers; things in this Prius are recessed deep
it took me 2 years before i got a set & THEN i realized i should've had these coming out of the womb

 

OBTW, I did that to a spark plug ignition coil once.
i did them so fast and in low light conditions that i lost/misplaced an ignition coil but never noticed it.
the Prius was not at full capacity for half a week, while i was dumbfounded
i retraced my steps and had to buy a new one for ~$7 at an autoparts store

so YES the Prius is quite sensitive but CAN operate while not at full capacity

 

The brake fluid reservoir is accessible, there's a little removable piece of the plastic cowl, for just this purpose. But total agreement about spark plug access, it is not a trivial endeavor. At least @NutzAboutBolts video walks you through it, #13 here:

Nutz About Bolts Prius Maintenance Videos | PriusChat

 

Mendel,
I FORGOT about that "little" & convenient plastic pullout from the cowel. ; )

 

Maybe this will help you.

Customizing lock functions | PriusChat

 

So...it's 2025 and this post helped me out. Did the thermostat on a 2012 plug-in and ironically, and unrelated, forgot to plug back in the mass airflow sensor and started the vehicle like thomassurdi did. Got the check hybrid system warning and warning triangle and vehicle died. Ran the codes and got p3090, p0102, p0103, and p3091. Turns out I also forgot to plug in the vacuum hose that I unplugged to reach the thermostat's back bolt. After reading this post I went back in a third time to look for a disconnected hose and sho nuff! The engine still overheats at high speed so it's on to the radiator since it was pretty dirty during the flush before the thermostat and the water pump is 4x as much. Thanks!!