Scania BCI DTC 639 Gearbox temperature, CAN communication fault

BCI BCI control unit · Scania · 4 variants

Code 639 (decimal). Some diagnostic tools show it in hexadecimal as 027F.

In short

Faulty information regarding the gearbox temperature.

Variant 1

Applies to: BCI2 (BWE)

What does Scania BCI fault code 639 mean?

What causes Scania DTC 639?

How does the system react?

How to fix Scania BCI fault code 639?

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Variant 2

Applies to: BCI3 (BWE)

Variant 3: Information fault, gearbox temperature

Applies to: BCI1 (BWE)

Variant 4: Information fault, gearbox temperature

Applies to: BCI2 (BWE)

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

Code 639 in other Scania systems

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