Scania EEC DTC 4665 Reductant circuit

EEC Exhaust Emission Control · Scania

Code 4665 (decimal). Some diagnostic tools show it in hexadecimal as 1239.

In short

The reductant heater for reductant hose 3 (H27) has consumed more power than permitted.

Applies to: EEC3

What does Scania EEC fault code 4665 mean?

What causes Scania DTC 4665?

How does the system react?

How to fix Scania EEC fault code 4665?

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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 4665 in other Scania systems