Could you tell me and what symptoms your machine is showing (such as failing to shift, overheating, or refusing to crank)? This will help me provide you with a highly specific troubleshooting sequence for your situation. JD 6420 will not move! - Yesterday's Tractors Forums
(left/right) to scroll through different control units (e.g., ECU, BCU, EPC). Selecting "ALL" : To see all stored codes, scroll until the display shows . You typically enter this sub-menu by toggling the hazard warning switch on and off. Reading Codes : If a unit has a problem, it will show ; if it’s clear, it shows Clearing Codes john deere d1a code full
: On some garden and utility models, a "d1A" can relate to the forward and reverse pedals being out of range or having wiring issues with the potentiometers. How to Fix and Exit Diagnostic Mode Could you tell me and what symptoms your