Scania COO DTC 638 Brake pedal sensor

COO Coordinator · Scania · 5 variants

Code 638 (decimal). Some diagnostic tools show it in hexadecimal as 027E.

In short

The brake pedal sensor's 2 output signals (normal and redundant) are implausible in relation to each other.

Variant 1

Applies to: COO11 (COO)COO8 (COO)

What does Scania COO fault code 638 mean?

What causes Scania DTC 638?

What are the symptoms?

How to fix Scania COO fault code 638?

Read the full explanation with Premium

Causes, system reaction, symptoms and step-by-step repair instructions for every fault code are available to Premium members.

  • Full explanations of every code and brand
  • Causes, symptoms and repair steps
  • New brands and codes included
Get Premium – 7,50 € / month I already have an account

Yearly plan: pay 10 months, get 12. Cancel at any time.

Variant 2

Applies to: COO10 (COO)

Variant 3

Applies to: COO9 (COO)

Variant 4

Applies to: COO7

Variant 5

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 638 in other Scania systems

Compare code 638 in every system →