OBD-II code C0573 indicates that the vehicle's brake control module has detected an open circuit in the Brake Pressure Sensor C circuit. This sensor is typically used to monitor hydraulic brake pressure for stability control and anti-lock braking systems (ABS).
The sensor itself may have failed internally, causing an open circuit. This is the most common cause for this code.
Wiring between the sensor and control module may be broken, chafed, or corroded, especially in areas exposed to moisture or movement.
A loose connector at the sensor or control module can cause an intermittent or permanent open circuit.
A fuse or relay related to the ABS or brake system may be defective, disrupting power to the sensor circuit.
While rare, the control module may have an internal failure affecting the sensor circuit. This is typically a last-resort diagnosis after other causes are ruled out.
While the vehicle may remain drivable, ABS and stability control systems may be disabled. This can reduce braking performance and vehicle stability in emergency maneuvers. Have the issue diagnosed and repaired as soon as possible.
No. The control module is rarely the cause of this code. Most cases are due to a faulty sensor, wiring issues, or poor connections. Replacing the control module should only be considered after all other potential causes have been thoroughly checked.
Some technicians may default to replacing the control module if they cannot quickly identify the root cause. However, this is often unnecessary and costly. A proper diagnosis should include testing the sensor, wiring, and connections before considering module replacement.
No. The base hydraulic brake system should continue to function normally. However, ABS and stability control features may be disabled, which can affect braking performance in slippery or emergency conditions.