EMS 1284 Scania Cylinder 4, severe misfiring

EMS Engine Management System · Scania

Code 1284 (decimal). Some diagnostic tools show it in hexadecimal as 000504.

In short

Cylinder 4 is misfiring so much that there is a risk of damage to the catalytic converter.

Applies to: EMS10

What does Scania EMS fault code 1284 mean?

What causes Scania DTC 1284?

What are the symptoms?

How to fix Scania EMS fault code 1284?

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

Code 1284 in other Scania systems

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