Scania ATA DTC 191 Control unit

Q: What does Scania ATA fault code 191 mean?

Control unit. Incorrect or invalid data in the control unit. Code 191 (decimal). Some diagnostic tools show it in hexadecimal as 00BF.

ATA ATA control unit · Scania

Code 191 (decimal). Some diagnostic tools show it in hexadecimal as 00BF.

In short

Incorrect or invalid data in the control unit.

Applies to: ATA1ATA2

What does Scania ATA fault code 191 mean?

Incorrect or invalid data in the control unit.

What causes Scania DTC 191?

Electrical interference to control unit.

How to fix Scania ATA fault code 191?

Check the voltage supply to the control unit and rectify the fault.
Test run the auxiliary heater.

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