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Home DTC Codes C0338 Medium · 30-60min
C0338 Critical

OBD2 Code C0338: Braking - Control Module

Brake module malfunction.

ECU: ABS

Detected Root Component

Chassis Component

Confidence level: low

Observed Symptoms

  • Braking noise
  • Soft brake pedal
  • Vehicle pulls when braking
  • ABS light on

Possible Causes

  • Faulty wheel speed sensr
  • Faulty ABS module
  • Contaminated brake fluid
  • Failed master cylinder
Diagnostic Progress 0 %
Difficulty Medium
Est. time 30-60min
Tools Required 5 tool(s)

Tools Required

multimeter OBD scanner wiring diagram test light terminal probe kit

Interactive Diagnostic

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Diagnostic Result

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certainty points

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Parts likely to be the cause (Capteur ABS)

Capteur ABS

Capteur ABS

Photo d'illustration : Capteur ABS

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Frequently asked questions about code C0338

What does code C0338 mean?

OBD2 Code C0338: Braking - Control Module. Brake module malfunction.

What are the symptoms of code C0338?

Code C0338 may cause: Braking noise, Soft brake pedal, Vehicle pulls when braking, ABS light on. The intensity of these symptoms varies depending on the vehicle and driving conditions.

What causes code C0338?

The most common causes of code C0338 are: Faulty wheel speed sensor, Faulty ABS module, Contaminated brake fluid, Failed master cylinder. A proper OBD2 diagnostic will pinpoint the exact cause.

Is it serious to drive with code C0338?

Yes, code C0338 is critical (Critical). Avoid driving and consult a professional promptly to prevent major damage.

How do I fix code C0338?

Start by reading the code with an OBD2 scanner, then follow the interactive decision tree on this page. Priority causes to check: Faulty wheel speed sensor, Faulty ABS module, Contaminated brake fluid, Failed master cylinder. Difficulty: Medium · Estimated time: 30-60min.