Though less common, damaged wiring, a loose connector to the pedal assembly, or a rare fault within the controller itself can also be the source of the problem.
The error persists even when the pedal is visibly untouched and the floor is completely clear.
Specifically, is an informative message, not a critical system failure. It unequivocally indicates that the "Accelerator pedal was applied during power-up." . In simpler terms, the truck was powered on while the accelerator pedal was depressed. Jungheinrich Error Code 1901
The most common cause is a simple mistake where the operator's foot is on the accelerator pedal when turning the key to the "On" position. The truck’s safety logic detects the active pedal and prevents startup.
Jungheinrich Forklift Error Codes - Machine Maxx USA. * 0915.2 – Industrial truck not ready for operation – battery door opened. * Machine Maxx USA Jungheinrich Error Code List - Google Groups Though less common, damaged wiring, a loose connector
If the code persists after a restart and physical inspection, the issue is likely a or a wiring harness failure . These require specialized diagnostic tools to calibrate or replace. You can refer to the Jungheinrich Operating Manuals Database0;4a1; 0;850; for series-specific electrical diagrams. 18;write_to_target_document7;default0;a76;18;write_to_target_document1a;_GxjuaaCCDKeP8L0P1LrdkAo_20;16;
Yes, but far more common on (3-phase) because they use smaller, more sensitive NTC sensors embedded directly in the copper windings. It unequivocally indicates that the "Accelerator pedal was
. This code belongs to the category of operator-related event messages rather than internal mechanical failures. Machine Maxx USA Meaning and Causes
In the vast majority of cases, Jungheinrich Error Code 1901 is a minor, operator-caused inconvenience rather than a sign of a serious mechanical fault. The code serves a critical safety function, preventing the forklift from moving unintentionally when powered on. The recommended course of action is simple: verify the accelerator pedal is free from obstruction, fully release it, and perform a full system power cycle. If this does not resolve the issue, or if the error is accompanied by any other codes like 1901.3 or 1901.4, it is time to call a trained Jungheinrich service technician to inspect the pedal assembly, its sensor, and the associated wiring.
– this will not clear stored codes on Jungheinrich trucks made after 2012. The EEPROM retains faults.
Moisture ingress from wet warehouse floors or pressure washing corrodes the small pins inside the motor connector. Code 1901 often appears after cleaning.