Jungheinrich Error Code 1901 May 2026

0;1052;0;2cb; 0;908;0;f1; 0;88;0;98; 0;279;0;17a; 0;1247;0;b19;

Method 1 – Hard Key Cycle (Non-Persistent Errors)

  1. Turn the ignition key to the OFF position.
  2. Wait 60 seconds (allowing capacitors in the controllers to discharge).
  3. Disconnect the negative battery terminal for 2 minutes.
  4. Reconnect the battery, turn the key to ON, but do not press the accelerator.
  5. Clear any active warnings by pressing the “OK” or “Check” button on the dashboard (if supported).
  6. Test drive slowly.
  • Tighten and torque motor/controller power terminals to spec; check for corrosion at battery/distribution posts and fuses.

Action to take:

  • Check battery charge and connections (most common fix).
  • Inspect harness connectors for moisture or damage.
  • Cycle key power (off → wait 30 sec → on) to see if code clears.
  • If persists, a technician with Jungheinrich diagnostic software is required to test CAN bus termination and controller health.

If you see error code 1901 on your display, follow these steps to reset the system: Jungheinrich Error Code 1901

Disclaimer: This guide is for informational purposes. Always consult the specific Jungheinrich service manual for your model and serial number range, as error code definitions can vary between machine generations. Turn the ignition key to the OFF position

Definition: Drive pedal (accelerator) is pressed or stuck while the truck is starting up. Tighten and torque motor/controller power terminals to spec;