# Troubleshooting Y Motor Errors on the MiSeq

The following MiSeq Y motor errors usually stop the run and indicate communication problems with the stage or problems with stage hardware:

* Y Motor: Closed-loop move cannot reach target position: Start = 75.4150390625 mm, Target = 75.40472 mm, Distance = -0.0103190625000025 mm, Stopped at 74.42236328125 mm, ExceptionMessage =
* The FPGA reported an error while executing command "YMVTO 154429"; error message: "Error: too many steps needed"
* Error: Timeout of 60.000 seconds exceeded while waiting for FPGA command "YMVTILE 1327" to complete

  ![](/files/d5mm4dr8342L85jC5nFK)

  ![](/files/85fwSfbGsK2pSkCRWySt)

**Troubleshooting Steps**:

1. Perform the post-run wash, if the run stops or after the run is completed.
2. Power cycle\* the MiSeq.
3. If no issues with re-initialization, perform the **Y Stage test 5 times.**

* Make sure that a used flow cell is loaded on the instrument (the same wash flow cell should be okay).
* Select Y Stage test.
  * MiSeq Control Software (MCS) v 4.0: From Main Menu, select System Check.
  * MCS 3.1 and older: From Welcome Screen, select Manage Instrument, select System Check.
* Follow the prompts on the screen to start the test, and repeat the test 4 more times (5 times total).

4. If all Y Stage tests pass continue with normal sequencing.
5. If the system fails to initialize or any of the 5 replicates of the Y Stage test fail, contact [Illumina Technical Support](https://www.illumina.com/company/contact-us.html#/) for further assistance.

For further information, search for the following Knowledge Base articles:

* \***How to Shut down or power cycle the MiSeq.**
* **\*How To Power Cycle the MiSeq Video.**
* **System Checks on MiSeq.**

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| *For any feedback or questions regarding this article (Illumina Knowledge Article #1452), contact Illumina Technical Support* [*techsupport@illumina.com*](mailto:techsupport@illumina.com?subject=Question%2FFeedback%20Regarding%20Illumina%20Knowledge%20Article%20#000001452%20-%20Instrumentation%20\&body=Dear%20Illumina%20Technical%20Support,%0D%0A%0D%0A)*.* |


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