Hyundai Tiburon 2003 Workshop Manual page 210

P0444 EVAP Emission Control System
Purge Control Valve Circuit
Open
P0445 EVAP Emission Control System
Purge Control Valve Circuit
Shorted
P0449
EVAP Emission Control System
Vent Valve/Solenoid Circuit
P0447
EVAP Emission Control System
Vent Circuit Open
P0448
EVAP Emission Control System
Vent Circuit Shorted
P0451 EVAP Emission Control System
Pressure Sensor
Range/Performance Problem
P0452
EVAP Emission Control System
Pressure Sensor Low Input
P0453 EVAP Emission Control System
Pressure Sensor High Input
P0454 Evaporative Emission Control
System - Pressure Sensor
Intermittent
P0455 EVAP Emission Control System
- Large Leak
P0456 Evaporative Emission Control
System - Small Leak Detected
(0.5mm)
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• Faulty PSV
• Open between PSV and ECM
• Faulty PSV
• Short to GND or battery between PSV and ECM
• Stuck in valve closed position (CCV)
• Faulty CCV
• Open or short to battery between CCV and ECM
• Faulty CCV
• Short to GND between CCV and ECM
• Faulty CCV
• High resistance or open between fuel tank pressure sensor
and ECM
• Stuck closed canister close valve
• Blocked vapor hose between canister and CCV
• Open or short to battery between FTPS and ECM
• Faulty FTPS
• Short to GND between FTPS and ECM
• Faulty FTPS
• Open or short to battery between fuel tank pressure sensor
and ECM
• Short to battery in ECM
• Open in ECM
• Faulty FTPS
• Poor connections between FTPS and ECM
• Misplaced, loose or corroded terminals
• Foreign materials fouled FTPS
• Faulty FTPS
• Fuel filler cap loose or missing
• Fuel filler cap o-ring missing or damaged
• Faulty or damaged fuel filler pipe
• Leaking, disconnected or plugged fuel vapor lines
• Fuel in lines due to faulty rollover valve, on-board refueling
vapor recoveryvalve or stuck closed CCV
• Canister close valve clogged, stuck open or closed
• Improperly installed purge solenoid valve
• PSV stuck open or closed
• Faulty fuel tank pressure sensor
• Leaking canister or catch tank
If any codes relating to FTPS, CCV or PSV circuits are present,
do all repairs associated with those codes before proceeding
with this troubles area.
If DTC P0455 is stored and MIL is illuminated, before
proceeding to evaporative system test and repair, verify
whether the customer was running the engine during refueling.
Page 11 of 14
24.04.2008