Scania EMS DTC 313 Lambda sensor T154

EMS Engine Management System · Scania · 2 variants

Code 313 (decimal). Some diagnostic tools show it in hexadecimal as 0139.

In short

Deviating value from lambda sensor T154.

Variant 1

Applies to: EMS S7

What does Scania EMS fault code 313 mean?

Deviating value from lambda sensor T154.

What causes Scania DTC 313?

Possible causes: - The pumping current adaptation for the lambda sensor T154 has reached its maximum permitted value. - There is a fault in the lambda sensor T154 or its harness-to-harness connectors or electrical cables.

How does the system react?

The engine's torque is reduced to protect the engine.

How to fix Scania EMS fault code 313?

  1. Check whether the pumping current adaptation for the lambda sensor T154 has reached its maximum permitted value.
  2. Run the Pumping current adaptations wizard.
  3. Check the lambda sensor T154 and its harness-to-harness connectors and cable harness.
  4. Renew lambda sensor T154.
  5. After renewing the lambda sensor, run the Resetting pumping current adaptations wizard.

Variant 2

Applies to: EMS S8

Detection

Deviating value from lambda sensor T154.

Possible cause

Possible causes: - The pumping current adaptation for the lambda sensor T154 has reached its maximum permitted value. - There is a fault in the lambda sensor T154 or its harness-to-harness connectors or electrical cables.

System reaction

For vehicles with gas engines: The engine's torque is reduced to protect the engine. For vehicles with pneumatic or electric throttle: No system response. – – The engine's torque is reduced to protect the engine. | For vehicles with gas engines: The engine's torque is reduced to protect the engine. For vehicles with pneumatic or electric throttle: No system response. | – | The engine torque is reduced to protect the engine.

How to fix

  1. Check whether the pumping current adaptation for the lambda sensor T154 has reached its maximum permitted value.
  2. Run the Pumping current adaptations wizard.
  3. Check the lambda sensor T154 and its harness-to-harness connectors and cable harness.
  4. Renew lambda sensor T154.
  5. After renewing the lambda sensor, run the Resetting pumping current adaptations wizard.

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

Code 313 in other Scania systems

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