What is P0556 fault code? What is the Brake Boost Pressure Sensor Range/Performance problem? How do you fix the P0556 fault code What are the symptoms and causes for the P0556 fault code
What is the P0556 fault code? What does it signify?
One of the possible fault codes for the brake booster pressure sensor circuit is P0556. This code means that the powertrain controller module (PCM), has detected a problem that prevents the brake booster pressure sensor circuit operating. Other fault codes for the brake booster pressure sensor include P0557 and P0558.
The brake booster pressure sensor circuit measures the pressure applied to hydraulic brake booster. The PCM controls this circuit, which can adjust to different braking situations, adjust brake pedal pressure, and assist in pedal operation. This is needed to slow or stop the car when the driver applies minimum force to the brake pedal.
A code P0556 is set if the PCM detects a voltage signal coming from the brake booster pressure sensor circuit.
The P0556 fault code can affect vehicles of all makes and models, including but not limited to Fiat, Pontiac Chevrolet, Volkswagen, Ford.
What is the P0556 Fault Code?
These are the most common reasons that P0556 is triggered
- – Pressure sensor for defective brake booster
- Leaky vacuum lines and hoses that are damaged or corroded
- – Corroded, loose, or damaged connectors
- – Damaged or defective cables.
- – Defective vacuum hose non-return valve
- Defective brake booster
- – Defective PCM
What are the symptoms of the P0556 Fault Code?
These symptoms may be present in vehicles with code P0556.
- – The engine light will flash when the brake pedal is pressed.
- The brake warning light can flash or stay on if the brake pedal has been pressed.
- You may need to apply the brake pedal more forcefully to slow down or stop the vehicle.
- – Hardening your brake pedal
How do I fix the P0556 fault code?
The following repairs may be able to resolve the P0556 fault code:
- – Replacing a defective brake booster pressure sensor
- – Cleaning corrosion and replacing damaged connectors
- – Repair of short-circuited or damaged wiring
- – Repair or replacement of vacuum lines or hoses
- Repairing a damaged brake booster
- – Test the PCM and replace it if necessary
How Serious Is the P0556 Fault Code
This code will be more severe depending on the reason for the fault. If not addressed promptly, it can become increasingly serious. If the fault is left unattended, it could compromise the safety of your vehicle and prompt action may be necessary.
