Error detail for oauth "invalid access token"?

[williamspaul-1]

Is there any way to get more detail from the OAuth 2.0 plugin? The only response I'm getting is as follows:

{
    "fault": {
        "faultstring": "Invalid access token",
        "detail": {
            "errorcode": "oauth.v2.InvalidAccessToken"
        }
    }
}

which is not terribly helpful, because I need to know what part of the validation failed (i.e. lookup, timeout, product, client id, etc)

When tracing, I don't see any additional information in the flow output either.