Fault code lookup

PowertrainP0504

Caution

Severity: Caution - get it checked when you can

Brake Switch A/B Correlation

37 brands affected · Generic SAE J2012 description.

Key terms: SAE J2012: the standard generic code list · Powertrain: engine, transmission and emissions

Safety: This code relates to the braking system. Have braking checked promptly.

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?

Caution · drive with care

The braking system may be affected. Have it checked promptly; if the pedal feels abnormal, the car pulls when braking, or a brake warning light is on, stop safely.

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 37

BrandCodeDescriptionSystem
Ashok Leyland CVP0504Manifold Absolute Pressure/Barometric Pressure Circuit Low Input BrandPowertrain
BAIC MotorP0504Brake signal implausible BrandPowertrain
BYDP0504Brake switch fault BrandPowertrain
CheryP0504Brake signal BrandPowertrain
ChryslerP0504Brake Switch A/B Correlation SAEPowertrain
DaewooP0504Brake Switch A/B Correlation BrandPowertrain
DaihatsuP0504STP lamp SW system BrandPowertrain
DFFSP0504Wire disconnected BrandPowertrain
DFFXP0504Brake Switch A/B Correlation BrandPowertrain
DFXKP0504Brake signal implausible BrandPowertrain
EOBDP0504Korelasi suis brek 'A'/'B' BrandPowertrain
FordP0504Brake Switch A/B Correlation SAEPowertrain
GeelyP0504Brake Switch Relevance BrandPowertrain
GMP0504Brake Switch A/B Correlation BrandPowertrain
Great WallP0504Brake Switch A/B Correlation BrandPowertrain
HafeiP0504Brake Switch A/B Correlation BrandPowertrain
HoldenP0504Stop Lamp Switch Circuit BrandPowertrain
HondaP0504Brake Switch A/B Correlation SAEPowertrain
HyundaiP0504Brake Switch A/B Correlation SAEPowertrain
IsuzuP0504Brake Switch A/B Correlation SAEPowertrain
Land RoverP0504Brake Switch A/B Correlation SAEPowertrain
MahindraP0504Brake Switch A/B Correlation SAEPowertrain
MaseratiP0504Brake switch A and B correlation BrandPowertrain
MazdaP0504Brake Switch A/B Correlation SAEPowertrain
MitsubishiP0504Brake switch correlation BrandPowertrain
OpelP0504Brake Switch A/B Correlation BrandPowertrain
PeroduaP0504STP lamp SW system BrandPowertrain
PeugeotP0504Brake Switch A/B Correlation SAEPowertrain
ProtonP0504Brake switch correlation BrandPowertrain
SaabP0504Brake Switch A/B Correlation BrandPowertrain
MG (SAIC)P0504Brake Switch 01 Circuit BrandPowertrain
SubaruP0504Brake Switch A/B Correlation SAEPowertrain
SuzukiP0504Brake Switch 'A' / 'B' Correlation BrandPowertrain
SWM MotorP0504brake switch correlation fault BrandPowertrain
TataP0504Brake Switch 'A'/'B' Correlation BrandPowertrain
ToyotaP0504Brake switch correlation fault BrandPowertrain
VolkswagenP0504SAE: Brake Switch A B Correlation 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 3

These 7-character codes are manufacturer-specific variants of P0504 and may be reported by some scan tools.

BrandCodeDescriptionSystem
SsangYongP050400Brake switch (1),(2) correlation BrandPowertrain
Mercedes-BenzP050464Die Signale vom Schalter 'Bremslicht' sind im Vergleich untereinander unplausibel. Es liegt ein unplausibles Signal vor. BrandPowertrain
SprinterP050464Die Signale vom Schalter 'Bremslicht' sind im Vergleich untereinander unplausibel. Es liegt ein unplausibles Signal vor. BrandPowertrain

6Related codes

  • P0500 Vehicle Speed Sensor A
  • P0501 Vehicle Speed Sensor A Range/Performance
  • P0502 Vehicle Speed Sensor A Circuit Low Input
  • P0503 Vehicle Speed Sensor A Intermittent/Erratic/High
  • P0505 Idle Air Control System
  • P0506 Idle Air Control System RPM Lower Than Expected
  • P0507 Idle Air Control System RPM Higher Than Expected
  • P0508 Idle Air Control System Circuit Low
  • P0509 Idle Air Control System Circuit High
  • P050A Cold Start Idle Control System Performance
  • P050B Cold Start Ignition Timing Performance
  • P050C Cold start engine coolant temperature performance

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