Toyota Celica 2005 Repair Manual page 538

P0420 Catalyst System Efficiency Be-
(DI−494) low Threshold (Bank 1)
P0441 Evaporative Emission Control
(DI−501) System Incorrect Purge Flow
Evaporative Emission Control
P0442
System Leak Detected (Small
(DI−524)
Leak)
P0446 Evaporative Emission Control
(DI−501) System Vent Control Circuit
Evaporative Emission Control
P0451
System Pressure Sensor/Switch
(DI−545)
Range/Performance
Evaporative Emission Control
P0452
System Pressure Sensor/Switch
(DI−545)
Low Input
Evaporative Emission Control
P0453
System Pressure Sensor/Switch
(DI−545)
High Input
Evaporative Emission Control
P0456
System Leak Detected (Very
(DI−524)
Small Leak)
P0500
Vehicle Speed Sensor "A"
(DI−552)
2005 CELICA (RM1131U)
DIAGNOSTICS − ENGINE (2ZZ−GE)
S Gas leakage in exhaust system
S Heated oxygen sensor
S Three−way catalytic converter
S Vacuum hose is cracked, holed, blocked, damaged or discon-
nected ((1), (2), (3), (4), (5), (6), (7), (8), (9), (10) and (11) in
Fig. 1)
S Fuel tank cap is incorrectly installed
S Fuel tank cap is cracked or damaged
S Open or short in vapor pressure sensor circuit
S Vapor pressure sensor
S Open or short in VSV circuit for EVAP
S EVAP VSV
S Open or short in VSV circuit for CCV
S CCV
S Open or short in VSV circuit for pressure switching valve
S Pressure switching valve
S Fuel tank is cracked, holed or damaged
S Charcoal canister is cracked, holed or damaged
S Fuel tank over fill check valve is cracked or damaged
S ECM
S Fuel tank cap is incorrectly installed
S Fuel tank cap is cracked or damaged
S Vacuum hose is cracked, blocked, damaged or disconnected
((1), (2), (3), (4), (5), (6), (7), (8), (9), (10) and (11) in Fig. 1)
S Open or short in vapor pressure sensor circuit
S Vapor pressure sensor
S Open or short in VSV circuit for EVAP
S EVAP VSV
S Open or short in VSV circuit for CCV
S CCV
S Open or short in VSV circuit for pressure switching valve
S Pressure switching valve
S Fuel tank is cracked, or damaged
S Charcoal canister is cracked, or damaged
S Fuel tank over fill check valve is cracked or damaged
S ECM
S Same as DTC No. P0441
S Open or short in vapor pressure sensor circuit
S Vapor pressure sensor
S ECM
S Open in vapor pressure sensor circuit
S Vapor pressure sensor
S ECM
S Short in vapor pressure sensor circuit
S Vapor pressure sensor
S ECM
S Same as DTC No. P0442
S Combination meter
S Open or short in vehicle speed sensor circuit
S Vehicle speed sensor
S ECM
537
DI−339
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