Brake System Pressure Sensor Circuit Low Voltage
The brake system pressure sensor is detecting low voltage conditions.
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What it means (plain English)
The brake pressure sensor is supposed to send a certain voltage signal back to the computer to show how much pressure is in the brake system, but it’s reporting a voltage lower than what’s normal, which could mean either a bad sensor or a wiring issue.
What the computer is actually seeing
The brake pressure sensor typically sends a voltage of around 0.5V to 4.5V depending on the brake pressure. If the PCM sees a voltage below 0.5V, it triggers the C0713 code.
What a healthy reading looks like
Normal brake pressure sensor output should range from 0.5V (low pressure) to 4.5V (high pressure).
Guided diagnostic — the DiagCoach way
Don't just throw parts at it. Walk through these in order — each step tells you whether to keep going or stop and fix what you found.
- 1Check the brake fluid level; ensure it's above the minimum level.
- 2Inspect the wiring and connectors to the brake pressure sensor for any visible damage or corrosion. Repair as necessary.
- 3Using a multimeter, check the voltage at the brake pressure sensor connector with the key on (engine off). Expected output should be between 0.5V to 4.5V. If voltage is below 0.5V, proceed to the next step.
- 4With the ignition on, disconnect the sensor and measure the voltage from the wiring harness connector going to the sensor. If it's within the expected range, replace the sensor; if not, check the wiring harness.
- 5Test ground continuity at the sensor connector. Ensure it’s a solid ground (typically less than 0.1 ohms of resistance). If faulty, repair the ground connection.
Common causes
- Faulty brake pressure sensor
- Damaged wiring or connectors
- Weak battery voltage affecting sensor operation
- Poor ground connection for the sensor
Typical repair cost
$$
Related codes
Frequently asked questions
Can I drive the vehicle with this code present?
Yes, it's drivable but braking performance may be compromised, so fix it soon.
Will this code come back after resetting?
If the issue is not fixed, the code will likely reappear.
Why does this code pair with other brake codes?
They may indicate underlying issues in the brake system, often related to pressure or sensor problems.
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