Can't release the bucket on my 06 case 420 series 3 skidsteer. It works electronicly somehow.

We don't really deal with heavy machinery here. Either ask over at www.justanswer.com or get yourself a service manual for it. Unfortunately John Deere charge for them, but they are very detailed.

https://www.google.com/search?q=john+deere+320+skid+steer+service+manual+pdf

..

It is a known issue

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Is your hydraulic fluid full?

Check the ballast resistor and its wiring. The ignition switch can be good on the start side but bad on the run side.

Most transmissions go into a fail safe mode to prevent damage to transmission but you can still damage it if you keep driving it. Most related codes are due to speed sensors. But you will have to look up what the code means exactly.

IF YOU HAVE ELECTRONIC CONTROLS FOR THE HYDRAULICS THEN CHECK WIRING AND CIRCUIT ( FUSES) FOR THE DIRECTION SOLENOID FOR THE SPOOL VALVE

Go to junk yard or salvage yard take A flat head screw driver & A 10mm socket & wrench pop the molding remove both ends of the seat belt belt cost about $5.or 10. bucks change the belt booth ends

ya i recently had my battery go bad on me. 06 sonata is @ 58k. previous to the battery issue had noted as irritating and strange as it is that my hood latch was not releasing, so after a tow to the shop and a 3 day rental...parts and labor was over$500. the very nxt week even tho i asked them to take a look as id had the ESC off light illuminiate vry sporadically recently. was "noted and light is off now" by the shop. 3 days out of shop light on again....back in shop a week after first. now i'm being told the entire ESC electronics system needs to be replaced at just under $600. i am starting to suspect i shud have gone w a honda.

Wow!, I answered this about 30 minutes ago, but somehow my answer didn't post.

Fault code 420 is Catalyst system efficiency below threshold, ( bank 1 )
Fault code 430 is the same as above but, ( bank 2 )

Fault codes do not determine what part is bad, they just reduce the field for troubleshooting.
This is what I would have checked;
1. Oxygen sensor, upstream ( meaning before the catalytic converter )
2. Oxygen sensor, downstream ( meaning after the catalytic converter )
3. MAF, ( mass air flow ), sensor
4. Idle air control sensor.

Your problem will be with the emission system.

I hope this helps you.

Yes, it should be able to be reprogrammed to the 06