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Read articles →This is a hands-on DIY repair video showing an owner diagnosing and fixing a John Deere 4320 error code 01, caused by a failing pedal sensor. It walks through unbolting the sensor housing, identifying corrosion behind the connector, swapping in new sensors with dielectric grease, and reassembling everything. It ends with a week-later follow-up confirming the fix held through actual plowing use. Useful for 4320 owners troubleshooting this exact error.
Posted by an owner-operator (Life of a Camp Ranger) documenting real repairs on their own tractor, not a dealer or professional mechanic.
A failing pedal sensor, in this case caused by corrosion behind the connector likely from water getting in and breaking it down.
Unbolt the sensor housing using an 8mm socket, unplug the wiring, swap in new sensors, apply dielectric grease to the connections, and reassemble.
Yes, after about a week and 20 hours of plowing through three snowstorms, there were no issues or errors, confirming the repair worked.
