# Promise InterstitialAd.show()
Displays an interstitial ad.
# Return Values
# Promise
The interstitial ad display operation result.
# Error Codes
If an interstitial ad fails to display. the InterstitialAd.show() method returns a rejected Promise, which allows the developer to obtain the error code and the error message.
| Code | Exception | Cause |
|---|---|---|
| 2001 | Rate limit triggered | Interstitial ads cannot be displayed for a certain time after the Mini Program starts. |
| 2002 | Rate limit triggered | Interstitial ads cannot be displayed until a specified interval elapses after the display of a previous interstitial ad or rewarded video ad. |
| 2003 | Rate limit triggered | Interstitial ads cannot be displayed when a rewarded video ad or another interstitial ad is being displayed. |
| 2004 | Failed to render ad | This error is not caused by the developer's abnormal operation. It may be a result of switching between Mini Program pages. |
| 2005 | Unusual ad call | Cross-page calls are not allowed for interstitial ad instances. |