Scania APS DTC 340 Compressor control

APS Air Processing System · Scania

Code 340 (decimal). Some diagnostic tools show it in hexadecimal as 0154.

In short

Short circuit to earth.

Applies to: APS1

What does Scania APS fault code 340 mean?

Short circuit to earth.

What causes Scania DTC 340?

Internal fault in the control unit.

How does the system react?

Pressure regulation and regeneration cease. The pressure sensors are still active. The system attempts to start every ten seconds. Yellow warning lamp comes on.

How to fix Scania APS fault code 340?

  1. Check the solenoid valve and its connection to the control unit.
  2. Check the control unit.
  3. Clear the fault code and check that it is not regenerated.
  4. Renew the solenoid valve or control unit if necessary.

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

Code 340 in other Scania systems

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