Chassis, generic

C064D Brake Pressure Sensor N Circuit/Open

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modePossible

C064D concerns an interrupted circuit at brake pressure sensor N, the thirteenth of the series. Larger sensor counts push makers towards digital links. A Bosch patent proposes PSI5 or DSI current interfaces on which up to four pressure sensors share two wires for power and data; an open in such a pair would silence every sensor on it at once. SENT sensors, which Pico Technology shows with two pressure channels in one housing, can likewise lose two readings through one broken line. Continental's integrated module groups several sensors under one combined plug with the pump motor. Hence: if several pressure codes appear together, look for the common line or plug. No carmaker publishes C064D or assigns the letter N.

Likely causes

Open in a line or plug shared by several sensors
Poor contact at the sensor plug or spring contact
Internal interruption in sensor N

Symptoms

  • ABS/ESC warning lamp on, often with other pressure sensor codes
  • Stability control and brake assist unavailable

Repair estimate

DifficultyHardWorkshop job
Parts and labour€60–1,800
Time0.5–4 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

brake pressure sensor nsensor wiring

Related codes

C064EC064FC0650C0645C0649C0641

References: patents.google.com, picoauto.com, patents.google.com.