Toyota Camry Manual page 1338

DTC P0440
CIRCUIT DESCRIPTION
The vapor pressure sensor and VSV for vapor pressure sensor are used to detect abnormalities in the evap-
orative emission control system.
The ECM decides whether there is an abnormality in the evaporative emission control system based on the
vapor pressure sensor signal.
DTC P0440 is recorded by the ECM when evaporative emissions leak from the components within the dotted
line in fig. 1 below, or when the vapor pressure sensor malfunctions.
fig. 1
(7)
DTC No.
Fuel tank pressure is atmospheric pressure after vehicle is
P0440
driven for 20 min. (2 trip detection logic)
DIAGNOSTICS
Evaporative Emission Control System
Malfunction
(6)
VSV
for EVAP
(5)
Charcoal Canister
DTC Detecting Condition
– ENGINE (1MZ–FE)
ECM
Vapor Pressure
Sensor
(1)
VSV for Vapor
(4) Pressure Sensor
D Vapor pressure sensor
D Fuel tank cap incorrectly installed
D Fuel tank cap cracked or damaged
D Vacuum hose cracked, holed, blocked, damaged or
disconnected ((1) or (2) in fig. 1)
D Hose or tube cracked, holed, damaged or loose seal
((3) in fig. 1)
D Fuel tank cracked, holed or damaged
D Charcoal canister cracked, holed or damaged
D Fuel tank over fill check valve cracked or damaged
Author :
Fuel Tank Over Fill
(2)
Check Valve
(8)
(9)
(3)
Fuel Tank
Trouble Area
Date :
DI–311
DI4DT–01
A01652
546