Scania COO DTC 804 Voltage supply, short circuit to earth

COO Coordinator · Scania · 5 variants

Code 804 (decimal). Some diagnostic tools show it in hexadecimal as 0324.

In short

Short circuit in voltage supply travelling via relay 19.

Variant 1

Applies to: COO11 (COO)COO8 (COO)

What does Scania COO fault code 804 mean?

What causes Scania DTC 804?

What are the symptoms?

How to fix Scania COO fault code 804?

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Variant 2

Applies to: COO10 (COO)

Variant 3: Supply voltage, short circuit to ground

Applies to: COO9 (COO)

Variant 4: BMU control unit

Applies to: COO7

Variant 5: Supply voltage, short circuit to ground

Applies to: COO8

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

Code 804 in other Scania systems

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