John Deere indicator code - John Deere Seat 4210 4310 4410 4510 4610 4710 Tractor

https://pdfgoal.com/downloads/John%20Deere%20Engine%20Fault%20Codes%20Spn%20Fmi%20File%20Type%20Pdf -------https://www.heavyequipmentforums.com/threads/john-deere-310sg-code-problem.40049/ ---------------https://www.justanswer.com/heavy-equipment/2vsmv-hello-getting-fault-code-f495-john-deere-backhoe.html -----------https://www.heavyequipmentforums.com/threads/trouble-codes-jd-h-series-dozers.6308/

Question edited for clarity and spelling 'deer' to 'Deere'.

Error Code sites. The best bet is to phone John Deere or buy the Service Manual.

https://www.google.com/search?q=John+Deere+4720+code+D+Error+5

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Question edited for clarity.
Question moved to a better John Deere category.

The error code is 'Controller doesn't see neutral'.

Slide 2 of 7 here

https://www.greentractortalk.com/threads/02-4210-not-moving-and-error-codes.14736/

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f494 is an ecu problem https://www.justanswer.com/heavy-equipment/1kuex-jd310-no-yr-s-shows-service-engine-soon.html John Deere 310G ECU Codes usually its a connection /broken shorted wire to ecu John Deere Fault Codes also notify a john deere dealer service about code for your unit they may have a fix or may need to flash ecm

They have a throttle body fuel injected engine. If its hard starting then smokes usually that indicates pour fuel quality or something wrong with fuel system.

For automotive applications, the tenth digit is the code for year of manufacture, but automotive VINs are 17 characters in length. At the link, it states that 13 character VINs for John Deere are not coded for year of manufacture. You may have to check with your John Deere dealer for help.
How to Read John Deere VIN

You just go to the link I attached I'm sure you will get the solution of your problem.
john deere 210le

If you want to solve your problem, click on the link I attach.
JOHN DEERE 4210 4310 4410 COMPACT UTILITY TRACTOR SERVICE REPAIR MANUAL

Try adjusting the linkage on the shifter the shifter may not be adjusted properly so the gears are not being fully engaged ,extend the linkage at least an inch or two (lengthen it)

as long as the lenth and diamather of the crank shaft are the same