What model year and trim level is your Avalon? Better yet, what is your VIN? That will help me answer your questions in #2.

The rear passenger door won't open: Is it locked? If not, have you tried both the exterior and the interior door handles to open it? If you are trying to unlock the door with the key fob (you said you can hear the actuator), why not unlock it manually with the lock button on the inside? Not sure I understand this one fully.

For #3, have you scanned your ECM for codes? If you can hear pinging, you should have a knock sensor code. Is your check engine light on?

 

The vin number is 4t1bf28b2yu060497
it’s a 2000 Avalon XL with 380,000 miles.

l’m sitting in the car, it’s 94 degrees but feels like 96, yes it’s Florida in the summer, so the car is unlocked and I try to open the stuck door by the outside handle 3 times, the handle comes up like normal but its still locked.
Went inside the car, used the silver open handle, wouldn’t open fully.
**Then tried the plastic lock/unlock switch near the silver handle and it would not change position either way, like whatever it connects to inside the door is jammed.

Is there a manual unlock switch under a piece of plastic that looks like a small flat head screw could pop that cover off?

About the pinging, I checked for codes and I only have a code stored for P0420, B0131.
**I never get a service engine light on the dash. I don’t know if the bulb is burned out, many of the bulbs are burned out but they are ones that stay on normal like the Drive light and the one that shows the miles driven. I hear taking the dash apart to replace all burned out bulbs, is difficult.

As of last night, it started showing the Air Bag error on the dash so I pulled the codes and the scanner showed B0131

no codes for pinging and for some reason it quit the pinging noise from the engine area when hard acceleration.

 

The ping seems gone. I guess work on either the “door stuck closed” OR the new “air bag“ not working dashboard light.

 

Let's work on one thing at a time. Working on 3 issues in one thread will get very confusing really fast. Which is your #1 priority of the 3 you noted - that you want to fix first?

 

Door Stuck Closed

Your rear passenger door (RH side) doesn't open. Car is unlocked. You can hear the actuator getting power. What does this mean? Are you referring to the power door lock actuator?

You lift the outside handle, but nothing happens. Used the inside handle (silver color) and it wouldn't open fully. What do you mean "wouldn't open fully"? The door wouldn't open fully or the handle wouldn't move as much as the handle on the rear driver's side door?

**Then tried the plastic lock/unlock switch near the silver handle and it would not change position either way, like whatever it connects to inside the door is jammed. Can you provide a photo of this plastic lock/unlock switch? I'm not aware of such a switch. There is a power window switch on the rear passenger door. But I'm not aware of a plastic lock/unlock switch near the silver handle.

Sorry for all the questions, but need clarity.

 

If you still have a stuck door, try this.