Toyota Tundra. Manual — part 1149

(except Regular
Cab Standard
Deck)



Front No. 3
exhaust pipe sub-
assembly (except
Regular Cab
Standard Deck)

P043E

Evaporative Emission
System Reference
Orifice Clog Up



Canister pump
module
(Reference
orifice, leak
detection pump,
vent valve)



Connector/wire
harness (Canister
pump module -
ECM)



EVAP system
hose (pipe from
air inlet port to
canister pump
module, canister
filter, fuel tank
vent hose)



ECM

Comes on

DTC Stored

P043F

Evaporative Emission
System Reference
Orifice High Flow



Canister pump
module
(Reference
orifice, leak
detection pump,
vent valve)



Connector/wire
harness (Canister
pump module -
ECM)



EVAP system
hose (pipe from
air inlet port to
canister pump
module, canister
filter, fuel tank
vent hose)



ECM

Comes on

DTC Stored

P0441

Evaporative Emission



Purge VSV

Comes on

DTC Stored

2008 Toyota Tundra

2008 ENGINE PERFORMANCE Engine Control System (1GR-FE) - Tundra

Control System
Incorrect Purge Flow



Connector/wire
harness (Purge
VSV - ECM)



ECM



Canister pump
module



Leakage from
EVAP system



Leakage from
EVAP line
(Purge VSV -
Intake manifold)

P0451

Evaporative Emission
Control System
Pressure Sensor
Range/Performance



Canister pump
module



Connector/wire
harness (Canister
pump module -
ECM)



EVAP system
hose (pipe from
air inlet port to
canister pump
module, canister
filter, fuel tank
vent hose)



ECM

Comes on

DTC Stored

P0452

Evaporative Emission
Control System
Pressure
Sensor/Switch Low
Input



Canister pump
module



Connector/wire
harness (Canister
pump module -
ECM)



EVAP system
hose (pipe from
air inlet port to
canister pump
module, canister
filter, fuel tank
vent hose)



ECM

Comes on

DTC Stored

P0453

Evaporative Emission
Control System
Pressure
Sensor/Switch High



Canister pump
module



Connector/wire

Comes on

DTC Stored

2008 Toyota Tundra

2008 ENGINE PERFORMANCE Engine Control System (1GR-FE) - Tundra

Input

harness (Canister
pump module -
ECM)



EVAP system
hose (pipe from
air inlet port to
canister pump
module, canister
filter, fuel tank
vent hose)



ECM

P0455

Evaporative Emission
Control System Leak
Detected (Gross Leak)



Fuel tank cap
(loose)



Leakage from
EVAP line
(Canister - Fuel
tank)



Leakage from
EVAP line
(Purge VSV -
Canister)



Canister pump
module



Leakage from
fuel tank



Leakage from
canister

Comes on

DTC Stored

P0456

Evaporative Emission
Control System Leak
Detected (Very Small
Leak)



Fuel tank cap
(loose)



Leakage from
EVAP line
(Canister - Fuel
tank)



Leakage from
EVAP line
(Purge VSV -
Canister)



Canister pump
module



Leakage from
fuel tank



Leakage from
canister

Comes on

DTC Stored

2008 Toyota Tundra

2008 ENGINE PERFORMANCE Engine Control System (1GR-FE) - Tundra

P0500

Vehicle Speed Sensor
"A"



Open or short in
speed signal
circuit



Wheel speed
sensor



Combination
meter



ECM



Skid control
ECU

Comes on

DTC Stored

P0504

Brake Switch "A"/"B"
Correlation



Short in stop
light switch
signal circuit



STOP fuse



IGN fuse



Stop light switch



ECM

-

DTC Stored

P0505

Idle Control System
Malfunction



TCS



Air induction
system



PCV hose
connections



ECM

Comes on

DTC Stored

P050A

Cold Start Idle Air
Control System
Performance



Throttle body
assembly



Mass air flow
meter



PCV system



Air cleaner filter
element



Air induction
system



VVT system



ECM

Comes on

DTC Stored

P050B

Cold Start Ignition
Timing Performance



Throttle body
assembly



Mass air flow
meter



PCV system



Air cleaner filter

Comes on

DTC Stored

2008 Toyota Tundra

2008 ENGINE PERFORMANCE Engine Control System (1GR-FE) - Tundra