OBD Guide

C064B

Brake Pressure Sensor M Circuit Low

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$56–167 (est.)

Symptoms

  • The brake system fault indicator is on
  • Reduced ABS/ESC performance
  • Unusual brake behavior (eg soft pedal)

Causes

  • Brake pressure sensor malfunction
  • Open or short circuit in wiring harness
  • Poor contact in the sensor connector
  • Problems with power or circuit ground
  • Malfunction of the brake system control unit

How to Fix

  1. Check the integrity of the wiring harness and connectors
  2. Measure resistance and voltage at the sensor
  3. Check ground and power circuit
  4. Replace brake pressure sensor if necessary
  5. Scan the system for other errors

Related codes

Error C064B by Vehicle Brand