Scania ZF DTC 5821 Output shaft speed sensor

ZF ZF gearbox · Scania

Code 5821 (decimal). Some diagnostic tools show it in hexadecimal as 16BD.

In short

Incorrect signal from the output shaft speed sensor.

Applies to: ZF1

What does Scania ZF fault code 5821 mean?

Incorrect signal from the output shaft speed sensor.

What causes Scania DTC 5821?

The gearbox control unit, pin 16, detects a short circuit to ground. The voltage has been below 0.7 V. The gearbox control unit, pin 16, detects a short circuit to positive. The voltage has exceeded 8 V. The gearbox control unit, pin 16, detects an open circuit in the wiring. The voltage has exceeded 3.5 V.

How does the system react?

The system switches to emergency program mode.

How to fix Scania ZF fault code 5821?

  1. Check the signal to pin 16 in the connector for the gearbox control unit.
  2. Check the speed sensor according to the section Checking solenoid valves and sensor.

This information is for guidance only. Always follow the manufacturer workshop manual and safety procedures; if in doubt, contact an authorised workshop.