Scania COO DTC 538 Ambient temperature sensor, driver's side

COO Coordinator · Scania

Code 538 (decimal). Some diagnostic tools show it in hexadecimal as 00021A.

In short

The supply voltage exceeds the threshold value.

Applies to: COO11 (COO)

What does Scania COO fault code 538 mean?

The supply voltage exceeds the threshold value.

What causes Scania DTC 538?

- Open circuit in cable harness. - Short circuit in the supply mains for the voltage supply. - Fault in a harness-to-harness connector. - The ambient temperature sensor is not working.

What are the symptoms?

Temperature indication is missing.

How to fix Scania COO fault code 538?

  1. Check the cable harness.
  2. Check the connectors.
  3. Check that the ambient temperature sensor is working.

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

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