Fault code lookup

PowertrainP0557

Serious

Severity: Serious - have it checked soon

Brake Booster Pressure Sensor Circuit Low

34 brands affected · Generic SAE J2012 description.

Key terms: Boost pressure: extra air pressure made by a turbo or supercharger · SAE J2012: the standard generic code list · Powertrain: engine, transmission and emissions

Safety: This code relates to the braking system or brake assist. Braking may be affected.

1What it means in plain English

This range covers vehicle speed, idle and oil-pressure control, charging-system voltage, and brake-switch circuits.

2Common causes

  1. Carbon build-up in the throttle body
  2. Faulty idle air control valve
  3. Faulty vehicle speed sensor
  4. Faulty charging system or weak battery
  5. Wiring or connector fault

3Can I drive?

Serious · drive with care

Have it checked immediately: brakes or brake assistance may be affected. Do not drive if the pedal feels soft or hard, the car pulls when braking, or the brake warning light is on.

This page gives general information. It is not professional advice. For a definite diagnosis and a repair quote, ask a qualified mechanic to inspect the car.

4Brand data 34

BrandCodeDescriptionSystem
Ashok Leyland CVP0557Brake Booster Pressure Sensor Circuit Low SAEPowertrain
BAIC MotorP0557Brake Booster Pressure Sensor Circuit Low BrandPowertrain
BYDP0557Brake Booster Pressure Sensor Circuit Low BrandPowertrain
CheryP0557Brake Booster Pressure Sensor Circuit Low BrandPowertrain
DaewooP0557Brake Booster Pressure Sensor Circuit Low BrandPowertrain
DaihatsuP0557Brake booster sensor circuit open BrandPowertrain
DFFSP0557Short circuit to BrandPowertrain
DFFXP0557Brake Booster Pressure Sensor Circuit Low BrandPowertrain
DFXKP0557Brake Booster Pressure Sensor Circuit Low BrandPowertrain
EOBDP0557Bromsboostertryckgivarkrets låg BrandPowertrain
GeelyP0557Brake Booster Pressure Sensor Circuit Low BrandPowertrain
GMP0557Brake Booster Pressure Sensor Circuit Low BrandPowertrain
Great WallP0557Brake Booster Pressure Sensor Circuit Low BrandPowertrain
HafeiP0557Brake Booster Pressure Sensor Circuit Low BrandPowertrain
HoldenP0557Brake Booster Pressure Sensor Circuit Low Voltage BrandPowertrain
HondaP0557Brake Booster Pressure Sensor Circuit Low SAEPowertrain
HyundaiP0557Brake Booster Pressure Sensor Circuit Low SAEPowertrain
IsuzuP0557Brake Booster Pressure Sensor Circuit Low SAEPowertrain
Land RoverP0557Brake booster pressure sensor - circuit low BrandPowertrain
MaseratiP0557Brake Booster Pressure Sensor Circuit Low BrandPowertrain
MitsubishiP0557BPS low input BrandPowertrain
OpelP0557Brake Booster Pressure Sensor Circuit Low BrandPowertrain
PeroduaP0557Brake booster sensor circuit open BrandPowertrain
PeugeotP0557Brake Booster Pressure Sensor Circuit Low SAEPowertrain
PorscheP0557Brake Booster Pressure Sensor Circuit Low SAEPowertrain
ProtonP0557BPS low input BrandPowertrain
SaabP0557Brake Booster Pressure Sensor Circuit Low BrandPowertrain
MG (SAIC)P0557min-Error Brake booster pressure Sensor BrandPowertrain
SubaruP0557Brake Booster Pressure Sensor Circuit Low SAEPowertrain
SuzukiP0557Brake Booster Pressure SW circuit low input BrandPowertrain
SWM MotorP0557Brake booster vacuum pressure sensor shorted to low voltage or disconnected BrandPowertrain
TataP0557Brake Booster Pressure Sensor Circuit Low Input BrandPowertrain
ToyotaP0557Brake assist vacuum pressure sensor circuit short leading to low voltage or disconnected BrandPowertrain
VolkswagenP0557Pressure sensor for brake booster: short to GND; Defective BrandPowertrain

Legend: SAE is the generic J2012 description; Brand is text taken from that manufacturer’s data. Manufacturer rows keep the wording and language of the source data, and non-English text is tagged so screen readers pronounce it correctly.

5Extended variant codes 2

These 7-character codes are manufacturer-specific variants of P0557 and may be reported by some scan tools.

BrandCodeDescriptionSystem
HyundaiP055700If sensor signal input is lower than 0.25V during 3.0 sec, ECM sets DTC BrandPowertrain
SsangYongP055700Brake booster pressure sensor circuit low BrandPowertrain

6Related codes

  • P0550 Power Steering Pressure Sensor Circuit
  • P0551 Power Steering Pressure Sensor Circuit Range/Performance
  • P0552 Power Steering Pressure Sensor Circuit Low Input
  • P0553 Power Steering Pressure Sensor Circuit High Input
  • P0554 Power Steering Pressure Sensor/Switch Circuit Intermittent
  • P0555 Brake Booster Pressure Sensor Circuit
  • P0556 Brake Booster Pressure Sensor Circuit Range/Performance
  • P0558 Brake Booster Pressure Sensor Circuit High
  • P0559 Brake Booster Pressure Sensor Circuit Intermittent
  • P055A Engine oil pressure sensor/switch 'B' circuit
  • P055B Engine oil pressure sensor/switch 'B' range/performance
  • P055C Engine oil pressure sensor/switch 'B' low

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