Jungheinrich Error Code 0802 May 2026
Technical Service Report: Jungheinrich Error Code 0802
Document ID: JUNG-TS-0802 Date: 2024-07-15 Product Group: Jungheinrich Forklift Trucks (Electric) System: Traction Drive / Hydraulic Motor Control
- Speed Restriction: The truck will limit its travel speed (often to walking speed, e.g., 3-4 km/h) to prevent a loss of control if the steering is misaligned.
- Steering Function: In some models, the electronic steering assist may stop functioning entirely, leaving the operator with manual hydraulic steering (if equipped) or no steering at all.
- Under dashboard cover
- Near main controller box (usually under floor panel or behind seat)
- On top of drive motor controller
Conclusion
- At idle: 0% – 5% (depends on model).
- At full throttle: 95% – 100%.
8. Prevention & Recommendations
- Regular inspection: Include the motor harness and connectors in quarterly PM (Preventive Maintenance) checks, especially on reach trucks (ETV) where the drive unit articulates.
- Harness routing: If repeated failures occur, install spiral wrap or split loom tubing over the exposed section near the motor pivot.
- Software update: Ensure the traction controller has the latest Jungheinrich firmware, as some older versions had false 0802 triggering due to signal filtering issues (check TSB J-2021-04).
- The steer angle sensor is typically a potentiometer or a Hall-effect sensor. If the internal wiper track wears out, it sends "jumpy" or dead signals to the controller.
- Test Method: A technician uses a multimeter to measure the output voltage while turning the steering wheel. The voltage should sweep smoothly (e.g., 0.5V to 4.5V). If there are drops or spikes, the sensor is defective.
- Measure DC bus voltages and check inverter error flags.
- Inspect motor phase lines for shorts or grounding.
You can find official support and service manuals through the Jungheinrich Operating Manuals Database or by contacting authorized parts retailers like Machine Maxx USA jungheinrich error code 0802