P0557 Isuzu Brake Booster Pressure Sensor Circuit Low Voltage
Possible causes
– Faulty Brake Booster Pressure Sensor
– Brake Booster Pressure Sensor harness is open or shorted
– Brake Booster Pressure Sensor circuit poor electrical connection
– Brake Booster Pressure Sensor harness is open or shorted
– Brake Booster Pressure Sensor circuit poor electrical connection
Symptoms
– Engine Light ON (or Service Engine Soon Warning Light)
P0557 Isuzu Description
Brake booster pressure sensor is connected to brake booster by a hose. It detects brake booster pressure and sends the voltage signal to the Engine Control Module (ECM). The sensor uses a silicon diaphragm which is sensitive to the change in pressure. As the pressure increases, the voltage rises.
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