Scania ZF DTC 6618 Oil temperature in the gearbox sump

Q: What does Scania ZF fault code 6618 mean?

Oil temperature in the gearbox sump. Incorrect signal from the oil temperature sensor in the gearbox sump. Code 6618 (decimal). Some diagnostic tools show it in hexadecimal as 19DA.

ZF ZF gearbox · Scania

Code 6618 (decimal). Some diagnostic tools show it in hexadecimal as 19DA.

In short

Incorrect signal from the oil temperature sensor in the gearbox sump.

Applies to: ZF1

What does Scania ZF fault code 6618 mean?

Incorrect signal from the oil temperature sensor in the gearbox sump.

What causes Scania DTC 6618?

Oil temperature is or has been above 104°C in the oil sump.

How to fix Scania ZF fault code 6618?

Check the temperature sensor according to the section Checking sensor and solenoid valves.
Check that the gearbox cooling system is working correctly.

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