Code j1850 Displayed on Instrument Panel of Vehicle

The j1850 is a bus for diagnostics and data sharing. If you see the code displayed on dashboard there could be few issues.

Problem causes:

  • Loose fuse
  • Bad ground
  • Bad ignition key switch
  • Battery voltage low
  • Short to ground


You should get a OBD2 reader to find out more. OBD means on board diagnostics for vehicle self diagnostics as in this video:

There is a interface on a obd2 connector.

Engine codes begin with a P and those will help you find the exact problem.