Scania EEC DTC 8389 Reductant circuit

EEC Exhaust Emission Control · Scania

Code 8389 (decimal). Some diagnostic tools show it in hexadecimal as 20C5.

In short

Fault in the reductant heater for reductant hose 1 (H25).

Applies to: EEC3

What does Scania EEC fault code 8389 mean?

What causes Scania DTC 8389?

How does the system react?

How to fix Scania EEC fault code 8389?

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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 8389 in other Scania systems