Prusa error 13317 (I2C Receive Timeout) appears on the MK4 and its equivalents are #31317 on the CORE One, #35317 on the CORE One L, #26317 on the MK4S, #27317 on the MK3.9S, #21317 on the MK3.9, #28317 on the MK3.5S, #23317 on the MK3.5, and #12317 on the MINI. The Buddy board initiated an I2C read operation but the peripheral device failed to return data within the timeout window.

What the Error Means

An I2C receive timeout occurs when the Buddy board asks a peripheral — such as the accelerometer used for Input Shaper or the display controller — to send back data, but the device stops responding before the transfer completes. Unlike a send timeout, which occurs on outbound transactions, a receive timeout suggests the peripheral began a response but stalled, or the bus was disrupted during the return data phase. This is typically a transient event resolved by a restart, but recurring timeouts point to a marginal connection to an I2C peripheral or a peripheral device that is intermittently failing.

Step-by-Step Fix

1. Restart the printer. A one-time receive timeout is almost never reproducible and clears on reboot.
2. Power cycle with a 30-second wait if the error returns. Unplug from the wall, wait 30 seconds, and reconnect before powering back on.
3. Inspect I2C device connectors on the xBuddy board. With the printer off, open the electronics enclosure and check the connectors for all I2C-connected devices: the LCD ribbon cable, the accelerometer board cable, and any Wi-Fi module connector. Reseat any connectors that feel loose.
4. Update to the latest firmware. Firmware updates may include I2C receive timeout threshold adjustments that prevent false triggering. Download from prusa3d.com/drivers.
5. Contact Prusa Support if the error persists after firmware update. Provide the firmware version and a description of the conditions under which the timeout occurs — for example, whether it appears during startup, during probing, or during Input Shaper calibration.

Parts Required

• No replacement parts are typically required for this fix — basic tools only

If updating firmware and checking all connectors does not resolve the error, contact Prusa Support at help.prusa3d.com for evaluation of the accelerometer board or xBuddy board.

Frequently asked questions

What does Prusa 13317 mean?

Prusa error 13317 (I2C Receive Timeout) appears on the MK4 and its equivalents are #31317 on the CORE One, #35317 on the CORE One L, #26317 on the MK4S, #27317 on the MK3.9S, #21317 on the MK3.9, #28317 on the MK3.5S, #23317 on the MK3.5, and #12317 on the MINI. The Buddy board initiated an I2C read operation but the peripheral device failed to return data within the timeout window.

How do I fix Prusa 13317?

Prusa error 13317 means the Buddy board timed out waiting to receive I2C data. Learn how to restart, update firmware, and check peripheral connectors to resolve this fault.