Code C0574 indicates that the brake pressure sensor 'C' circuit is reporting a signal outside the expected range or is not performing correctly. This sensor monitors hydraulic pressure in a specific brake circuit, and the fault typically points to a sensor malfunction, wiring issue, or a hydraulic problem such as air in the system.
The sensor itself is the most common failure point. Internal damage, contamination, or wear can cause it to output an incorrect signal.
Damaged, corroded, or loose wiring/connectors at the sensor or ABS module can disrupt the signal, triggering the range/performance code.
Insufficient fluid or trapped air can alter actual brake pressure, causing the sensor to read outside the expected range.
Though less common, internal module failure can cause incorrect sensor readings or communication errors. This is a last-resort cause after thorough inspection of sensor and wiring.
It is not recommended. The code indicates a brake pressure sensor issue that may affect ABS, stability control, or normal braking. Have the system diagnosed promptly for safety.
No. While the sensor is the most common cause, wiring problems, low fluid, or air in the system are also frequent. The ABS module itself rarely fails for this code.
Many vehicles have multiple brake pressure sensors (e.g., for different hydraulic circuits or channels). 'C' identifies the specific sensor that triggered the fault.
No. C0574 is an ABS/ESC system code, not an engine control code. The PCM is almost never the cause; replacing it would be a waste of time and money.