Scania EMS DTC 138949 Exhaust gas aftertreatment – reductant heater H501

EMS Engine Management System · Scania

Code 138949 (decimal). Some diagnostic tools show it in hexadecimal as 021EC5.

In short

The heater has an open circuit.

Applies to: EMS LCS1

What does Scania EMS fault code 138949 mean?

What causes Scania DTC 138949?

How does the system react?

How to fix Scania EMS fault code 138949?

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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.