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I think I get it now.
1. I can't enter Canada with an expired PR
2. I Can't use US green card to enter.
3. I have to file a PRTD Which if approved, I can use to enter.

Thanks all. Did I get it right?

So I might as well do #3 for now, and if it isn't approved and my PR is revoked, does it mean I can use my green card to enter?
 
I think I get it now.
1. I can't enter Canada with an expired PR
2. I Can't use US green card to enter.
3. I have to file a PRTD Which if approved, I can use to enter.

No, you can enter Canada with an expired PR card but only in a private vehicle( rent a car is possible), which means from US side. You don't need PRTD for that. With PRTD you can fly into Canada or any other commercial vehicle like train or bus from the U.S.
 
Huh?
So if I ask someone from Canada to pick me up by car say at Niagara Falls New York, I can ride with him back to Canada just bringing my expired PR.

Only if I fly into Canada from US, or take commercial vehicle such as train or bus should I bring a PRTD?
 
So if I ask someone from Canada to pick me up by car say at Niagara Falls New York, I can ride with him back to Canada just bringing my expired PR.

Only if I fly into Canada from US, or take commercial vehicle such as train or bus should I bring a PRTD?

Correct!
 
Bingo! Long story short. Thanks Bule...
Will try private vehicle first. I can bring other identity docs such as Ontario ID, health card (both not expired yet) and social insurance card, and of course passport
 
If you e been out of Canada for more than a year, your health card is t valid anymore. You'll need to reapply.
 
I just tried to compute manually my residence for the past 5 years - that is, from 2013-1017, and if I am correct (though I have not yet tried to use the Residence Calculator), and I got the total of 743 days if I I submit the application for PR renewal by Aug. 30, assuming I am back in Canada by that time.

But as someone pointed out, I can't enter Canada on my expired PR status, how else can I get there. What if I tell the officer at the border that I want to visit my disabled son who was just been told the FINAL findings of his neurologists on the many tests, MRIs, exams he has been undergoing these past 3 years is that he has that rare disease called MULTIPLE SYSTEM ATROPHY - A Degenerative neuro disorder. I want to help him fill up forms for filing pension disability benefits. He has no one else living with him, his wife left him when he was starting to have the symptoms.

I need to spend quality time with him (he's 49 years old, living on social assistance and some part time job which is not much). And be truthful in declaring that my PR card expired last Aug. 21. I am thinking though that I might give up this status, if it's not advisable to renew it while having a US green card.

I'm confused and will really appreciate any advise.

You are currently meeting the RO obligation but will cease to do so on 12 September 2017, I don't know what happens if the reason you can't get back by then is caused by a delay getting a PRTD but it would seem a mitigating excuse - to me at least.