What is Time limit to report accident in PA?

Assuming only your vehicle was damaged and no one was hurt and you are asking about the time limit to report the accident to your insurance company.

Then:

The time limit or rather the statute of limitations in Pennsylvania to report damage to your auto in the form of a claim to your insurance company is 2 years. After that the insurance company can and will deny your claim and you will have to pay out of pocket to have it fixed.