DTC P0442 EVAP CONTROL SYSTEM
EC-1499
[VG33ER]
C
D
E
F
G
H
I
J
K
L
M
A
EC
DTC P0442 EVAP CONTROL SYSTEM
PFP:14950
On Board Diagnosis Logic
UBS00DXK
NOTE:
If DTC P0442 is displayed with P1448, perform trouble diagnosis for DTC P1448 first. (
EC-1659
.)
This diagnosis detects leaks in the EVAP purge line using engine intake manifold vacuum.
If pressure does not increase, the ECM will check for leaks in the line between the fuel tank and EVAP canister
purge volume control solenoid valve, under the following “Vacuum test” conditions.
The vacuum cut valve bypass valve is opened to clear the line between the fuel tank and the EVAP canister
purge volume control solenoid valve. The EVAP canister vent control valve will then be closed to shut the
EVAP purge line off. The EVAP canister purge volume control solenoid valve is opened to depressurize the
EVAP purge line using intake manifold vacuum. After this occurs, the EVAP canister purge volume control
solenoid valve will be closed.
PBIB1438E