Scania EEC DTC 4127 Exhaust gas temperature sensor upstream of oxidation catalytic converter

EEC Exhaust Emission Control · Scania

Code 4127 (decimal). Some diagnostic tools show it in hexadecimal as 101F.

In short

The exhaust gas temperature sensor upstream of the oxidation catalytic converter indicates incorrect values.

Applies to: EEC3

What does Scania EEC fault code 4127 mean?

The exhaust gas temperature sensor upstream of the oxidation catalytic converter indicates incorrect values.

What causes Scania DTC 4127?

Fault in the exhaust gas temperature sensor upstream of the oxidation catalytic converter.

How does the system react?

A fault message is sent to the EMS control unit.

How to fix Scania EEC fault code 4127?

  1. The 3 exhaust gas temperature sensors of the exhaust gas aftertreatment are connected to the same module.
  2. If there is a fault on one of the exhaust gas temperature sensors, the entire module must be renewed.
  3. Renew the exhaust gas temperature sensor module upstream of the oxidation catalytic converter.

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

Code 4127 in other Scania systems

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