Scania EMS DTC 55 Lambda sensor

EMS Engine Management System · Scania · 2 variants

Code 55 (decimal). Some diagnostic tools show it in hexadecimal as 0037.

In short

Lambda sensor preheating shows too low a value.

Variant 1

Applies to: EMS S7

What does Scania EMS fault code 55 mean?

Lambda sensor preheating shows too low a value.

What causes Scania DTC 55?

The fault may be due to the following causes: - Open circuit. - Short circuit to ground.

How does the system react?

– Limp home mode is activated. | – | The alarm is activated.

How to fix Scania EMS fault code 55?

  1. Carry out the following:
  2. Check the lambda sensor and also the connectors and cable harness.
  3. Check the fuse in the central electric unit.
  4. Renew the lambda sensor.

Variant 2

Applies to: EMS S8

Detection

Lambda sensor preheating shows too low a value.

Possible cause

The fault may be due to the following causes: - Open circuit. - Short circuit to ground.

System reaction

Limp home mode is activated.

How to fix

  1. Carry out the following:
  2. Check the lambda sensor and also the harness-to-harness connectors and cable harness.
  3. Check the fuse in the central electric unit.
  4. Renew the lambda sensor.

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

Code 55 in other Scania systems

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