Fault code lookup

PowertrainP0403

Caution

Severity: Caution - get it checked when you can

Exhaust Gas Recirculation Circuit

44 brands affected · Generic SAE J2012 description.

Key terms: EGR: exhaust gas recirculation, which cuts harmful gases · Control module: a small computer that runs one part of the car · SAE J2012: the standard generic code list · Powertrain: engine, transmission and emissions

1What it means in plain English

The engine computer cannot control the exhaust gas recirculation (EGR) valve properly.

2Common causes

  1. Faulty EGR valve
  2. Damaged wiring or connector
  3. Blown fuse
  4. Corroded connector pins
  5. Engine control module fault

3Can I drive?

Caution · drive with care

Usually safe to drive. Rough idling or pinging can follow; have it checked before an inspection.

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 44

BrandCodeDescriptionSystem
Ashok Leyland CVP0403Exhaust Gas Recirculation Circuit SAEPowertrain
BAIC MotorP0403Exhaust Gas Recirculation Control Circuit BrandPowertrain
Mercedes-BenzP0403Exhaust Gas Recirculation Circuit SAEPowertrain
BMWP0403Exhaust Gas Recirculation Control Circuit BrandPowertrain
BYDP0403EGR cont crt open BrandPowertrain
CheryP0403EGR control solenoid valve BrandPowertrain
ChryslerP0403Implausible Data Received From T-Case BrandPowertrain
DaewooP0403EGR Valve Voltage Low BrandPowertrain
DaihatsuP0403EGR system BrandPowertrain
DFFSP0403Fuel gauge failure BrandPowertrain
DFFXP0403EGR control solenoid valve BrandPowertrain
DFXKP0403EGR control circuit fault BrandPowertrain
EOBDP0403EGR 'A' ohjauspiiri/auki BrandPowertrain
FiatP0403Implausible data received from T-Case BrandPowertrain
FordP0403Exhaust Gas Recirculation Circuit SAEPowertrain
GeelyP0403EGR Control Circuit Fault BrandPowertrain
GMP0403Circuito Control Solenoide EGR BrandPowertrain
Great WallP0403EGR control solenoid valve BrandPowertrain
HafeiP0403EGR control solenoid valve BrandPowertrain
HoldenP0403Exhaust Gas Recirculation Control Circuit 1 BrandPowertrain
HondaP0403Exhaust Gas Recirculation Circuit SAEPowertrain
HyundaiP0403Exhaust Gas Recirculation Circuit SAEPowertrain
IsuzuP0403Exhaust Gas Recirculation Circuit SAEPowertrain
Land RoverP0403Check first BrandPowertrain
MahindraP0403Exhaust Gas Recirculation Circuit SAEPowertrain
MaseratiP0403Exhaust Gas Recirculation (EGR) Control Circuit Open BrandPowertrain
MazdaP0403Exhaust Gas Recirculation Circuit SAEPowertrain
MitsubishiP0403EGR control circuit BrandPowertrain
NissanP0403Exhaust Gas Recirculation (EGR) volume control valve circuit BrandPowertrain
OpelP0403Circuito Control Solenoide EGR BrandPowertrain
PeroduaP0403EGR system BrandPowertrain
PeugeotP0403Exhaust Gas Recirculation Circuit SAEPowertrain
PorscheP0403Exhaust Gas Recirculation Circuit SAEPowertrain
ProtonP0403EGR control circuit BrandPowertrain
SaabP0403AGR-MV Steuerung Stromkreis BrandPowertrain
MG (SAIC)P0403Driver airbag Leakage to plus on squib BrandPowertrain
SprinterP0403Exhaust Gas Recirculation Circuit SAEPowertrain
SubaruP0403Exhaust Gas Recirculation Circuit SAEPowertrain
SuzukiP0403Exhaust gas recirculation circuit malfunction BrandPowertrain
SWM MotorP0403EGR control circuit malfunction BrandPowertrain
TataP0403Exhaust Gas Recirculation Circuit SAEPowertrain
ToyotaP0403Fuel gauge failure BrandPowertrain
VolvoP0403EGR Vacuum Regulator Solenoid Circuit BrandPowertrain
VolkswagenP0403EGR valve (N18): malfunction 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 4

These 7-character codes are manufacturer-specific variants of P0403 and may be reported by some scan tools.

BrandCodeDescriptionSystem
HyundaiP040300If open in motor circuit of E-EGR actuator is detected, ECM sets DTC BrandPowertrain
SsangYongP040300High pressure Exhaust Gas Recirculation (EGR) valve H-bridge circuit open BrandPowertrain
Mercedes-BenzP040313Die Ansteuerung für Abgasrückführsteller (Zylinderreihe 1) hat einen elektrischen Fehler.Es liegt eine Unterbrechung vor. BrandPowertrain
Mercedes-BenzP040319Die Ansteuerung für Abgasrückführsteller (Zylinderreihe 1) hat einen elektrischen Fehler. Der Grenzwert für Strom ist überschritten. Die Ansteuerung für Abgasrückführsteller 'A' (Zylinderreihe 1) hat einen elektrischen Fehler. BrandPowertrain

6Related codes

  • P0400 Exhaust Gas Recirculation Flow
  • P0401 Exhaust Gas Recirculation Flow Insufficient Detected
  • P0402 Exhaust Gas Recirculation Flow Excessive Detected
  • P0404 Exhaust Gas Recirculation Circuit Range/Performance
  • P0405 Exhaust Gas Recirculation Sensor A Circuit Low
  • P0406 Exhaust Gas Recirculation Sensor A Circuit High
  • P0407 EGR Sensor B Circuit Low
  • P0408 EGR Sensor B Circuit High
  • P0409 Exhaust Gas Recirculation Sensor A Circuit
  • P040A Oil gauge failure
  • P040B EGR Temperature Sensor A Circuit Range/Performance
  • P040C EGR Temperature Sensor A Circuit Low

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