What of John Deere equipment are you working on? Did any other fault codes appear alongside the D1A code?
When "D1A" is displayed on the dashboard or performance monitor, you can use the following steps to find the actual trouble codes: Enter All-Unit Mode john deere d1a code
If you're interested, I can help you find a local John Deere service center. Was this guide helpful? Troubleshooting - John Deere - Technical Information Store What of John Deere equipment are you working on
On some mowers and compact tractors, a "d1A" error can be related to the forward and reverse pedals being out of range or having bad potentiometers. How to Fix or Exit d1A Mode 1. Check the Fuse Box john deere d1a code