Broken or chafed wire in the brake pressure sensor N circuit; Corroded or loose electrical connector at the sensor; Failed brake pressure sensor N; Faulty ABS control module internal circuit; Damaged wiring harness from road debris or improper previous repair; Poor ground connection shared with the ABS system

DTC codes / C06xx · Brakes, steering and suspension / C064D

C064DBrake Pressure Sensor N Circuit/Open

Q: What does code C064D mean?

Brake Pressure Sensor N Circuit/Open. The anti-lock brake system (ABS) module has detected an open circuit in the wiring for brake pressure sensor N, which is one of several pressure sensors used to monitor hydraulic brake pressure. This means the sensor's electrical path is broken, so the module cannot receive a valid pressure signal and will disable ABS and stability control functions as a safety precaution.

The anti-lock brake system (ABS) module has detected an open circuit in the wiring for brake pressure sensor N, which is one of several pressure sensors used to monitor hydraulic brake pressure. This means the sensor's electrical path is broken, so the module cannot receive a valid pressure signal and will disable ABS and stability control functions as a safety precaution.

SystemChassis

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyIntermediate

AreaBrakes, steering and suspension

Symptoms you may notice

ABS warning light illuminated on the dashboard
Traction control or stability control warning light also on
Often no symptoms besides the warning light
Reduced or disabled ABS operation during hard braking
Brake pedal may feel slightly different or require more effort in some vehicles
Electronic parking brake or hill-start assist may be inoperative

Common causes, most likely first

Broken or chafed wire in the brake pressure sensor N circuit
Corroded or loose electrical connector at the sensor
Failed brake pressure sensor N
Faulty ABS control module internal circuit
Damaged wiring harness from road debris or improper previous repair
Poor ground connection shared with the ABS system

How to diagnose and fix it

Use a scan tool to read ABS codes and confirm C064D is current or history
Visually inspect the brake pressure sensor N connector and wiring for damage or corrosion
Disconnect the sensor and check for reference voltage and ground at the harness connector
Measure resistance of the sensor circuit wiring to locate an open circuit
Perform a wiggle test on the harness while monitoring sensor data to find intermittent opens
Replace the brake pressure sensor N if wiring checks out and the sensor is faulty
Clear codes and verify the repair with a test drive and live sensor data

Open Circuits Often Hide in Plain Sight

A common oversight is replacing the ABS module when the actual fault is a simple broken wire near the sensor connector, so always check continuity first.
The code can set intermittently due to a loose connector that only loses contact over bumps, so a wiggle test with live data is essential.
Some vehicles use a shared pressure sensor for both ABS and stability control, so a failure can disable multiple systems and trigger several codes.
Corrosion inside the connector pins is a frequent cause on vehicles driven in salt-belt regions, even when the outside looks clean.
A weak battery or charging system fault can cause the ABS module to log false open-circuit codes, so check system voltage before condemning parts.

Can I keep driving with C064D?

You can usually drive the vehicle with this code, but the ABS and stability control systems are disabled, so avoid hard braking or slippery conditions and have the fault repaired promptly.

Tools that help

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Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.