Understanding why code 0802 appears requires looking at the accelerator pedal’s electronic architecture. Most Jungheinrich trucks use a Hall-effect sensor or dual potentiometer inside the pedal assembly. The controller expects a specific voltage range—typically 0.5V (idle) to 4.5V (full throttle). Code 0802 arises when:
Indirectly. On some models, the controller disables the drive motor but leaves the parking brake active. However, if the controller loses 5V reference, the parking brake solenoid may default to “locked” (truck cannot be pushed).
Moisture, battery acid fumes, or simple vibration can cause poor contact at the multi-pin connector on the drive controller (often labeled “Motor Temp” or “Temp Sensor”). A high-resistance connection leads to a plausibility error. jungheinrich error code 0802
After making repairs, clear the error using either:
Test the truck: Drive forward and backward for at least 30 minutes, including lifting while moving, to ensure the error does not return. Understanding why code 0802 appears requires looking at
Proactive tip: Some error code 0802 cases are resolved simply by replacing a $20 connector. Always start with the cheapest checks first.
Expected values:
If resistance is open (OL or infinite) – sensor is dead. If resistance is short (0 Ω or very low < 100 Ω) – sensor is shorted. If resistance does not change when you heat the motor (using a heat gun on low, carefully) – sensor has failed.
Rarely. Very low voltage (below 20V on a 24V system) can cause sensor readings to drift. However, the truck would typically show a separate “undervoltage” error (e.g., 0601 or 0602) first. Test the truck: Drive forward and backward for
The cable that runs from the drive motor to the main controller is subjected to constant flexing, especially on reach trucks where the mast moves. Chafing against the chassis, broken conductors, or corroded pins in the connector are frequent culprits.