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PowertrainP0440

Info

Severity: Info - usually nothing urgent

Evaporative Emission Control System

40 brands affected · Generic SAE J2012 description.

Key terms: EVAP: the system that traps fuel vapour · SAE J2012: the standard generic code list · Powertrain: engine, transmission and emissions

1What it means in plain English

The fuel vapour (EVAP) system is not holding pressure, which usually means a leak somewhere in the system.

2Common causes

  1. Loose, missing, or faulty fuel cap
  2. Leaking EVAP hose or connection
  3. Faulty purge or vent valve
  4. Cracked charcoal canister
  5. Faulty fuel tank pressure sensor

3Can I drive?

Info · normally safe to drive

Safe to drive; this only affects fuel vapour emissions. Check that the fuel cap is tight and have it looked at before an emissions test.

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 40

BrandCodeDescriptionSystem
Ashok Leyland CVP0440Evaporative Emission Control System SAEPowertrain
BAIC MotorP0440Evaporative Emission System BrandPowertrain
Mercedes-BenzP0440Evaporative Emission Control System SAEPowertrain
BMWP0440Function test, tank ventilation not O.K BrandPowertrain
BYDP0440Evaporative Emission System BrandPowertrain
CheryP0440Evaporative Emission System BrandPowertrain
ChryslerP0440Evaporative Emission (EVAP) system general fault BrandPowertrain
DaewooP0440Evaporative Emission System BrandPowertrain
DFFSP0440Evaporative Emission System BrandPowertrain
DFFXP0440Evaporative Emission System BrandPowertrain
DFXKP0440Evaporative Emission System BrandPowertrain
EOBDP0440Córas EVAP BrandPowertrain
FordP0440Evaporative Emission Control System SAEPowertrain
GeelyP0440Evaporative Emission System BrandPowertrain
GMP0440Evaporative Emission Control System SAEPowertrain
Great WallP0440Evaporative Emission System BrandPowertrain
HafeiP0440Evaporative Emission System BrandPowertrain
HoldenP0440Evaporative Emission Control System SAEPowertrain
HondaP0440Evaporative Emission Control System SAEPowertrain
HyundaiP0440Evaporative Emission Control System SAEPowertrain
IsuzuP0440Failure - fault code BrandPowertrain
Land RoverP0440EVAP System BrandPowertrain
MahindraP0440EVAP SML LEAK /P1440 BrandPowertrain
MazdaP0440Evaporative Emission Control System SAEPowertrain
MitsubishiP0440EVAP. emission control system BrandPowertrain
NissanP0440Evaporative Emission Control System SAEPowertrain
OpelP0440Evaporative Emission Control System SAEPowertrain
PeugeotP0440Evaporative Emission Control System SAEPowertrain
PorscheP0440Tankentlüftungssystem BrandPowertrain
ProtonP0440EVAP. emission control system BrandPowertrain
RenaultP0440Evap SML leak /P1440 BrandPowertrain
SaabP0440Evaporative Emission Control System SAEPowertrain
MG (SAIC)P0440Evaporative Emission System BrandPowertrain
SmartP0440Evaporative Emission Control System SAEPowertrain
SprinterP0440Evaporative Emission Control System SAEPowertrain
SubaruP0440Evaporative Emission Control System Malfunction BrandPowertrain
SuzukiP0440Evaporative emission control system malfunction BrandPowertrain
TataP0440Evaporative Emission System BrandPowertrain
ToyotaP0440Evaporative Emission System (EVAP) Minor Leakage BrandPowertrain
VolkswagenP0440EVAP Emission Control Sys: 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 1

These 7-character codes are manufacturer-specific variants of P0440 and may be reported by some scan tools.

BrandCodeDescriptionSystem
Mercedes-BenzP044078EVAP System. The adaptation or adjustment is incorrect. BrandPowertrain

6Related codes

  • P0441 Evaporative Emission Control System Incorrect Purge Flow
  • P0442 Evaporative Emission Control System Leak Detected (Small Leak)
  • P0443 Evaporative Emission Control System Purge Control Valve Circuit
  • P0444 Evaporative Emission Control System Purge Control Valve Circuit Open
  • P0445 Evaporative Emission Control System Purge Control Valve Circuit Shorted
  • P0446 Evaporative Emission Control System Vent Control Circuit
  • P0447 Evaporative Emission Control System Vent Control Circuit Open
  • P0448 Evaporative Emission Control System Vent Control Circuit Shorted
  • P0449 Evaporative Emission Control System Vent Valve/Solenoid Circuit
  • P044A EGR sensor 'C' circuit
  • P044B EGR sensor 'C' circuit range/performance
  • P044C EGR sensor 'C' circuit low

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