wx.login 获取的code

后端Server请求 https://api.weixin.qq.com/sns/oauth2/access_token?appid=xxxx&secret=xxxx&code=013PMxKn0VK0qq1XbpKn0O0IKn0PMxKG&grant_type=authorization_code

再次请求，https://api.weixin.qq.com/sns/userinfo?access_token结果为

{"errcode":48001,"errmsg":"api unauthorized, hints: [ req_id: JXXZKA0329s162 ]"}

请问小程序与开放平台Oatuth接口能共用吗？