Toyota Tundra. Manual — part 1327



A/F sensor (for
bank 1, 2 sensor
1)



A/F sensor
heater (for bank
1, 2 sensor 1)



A/F relay



A/F sensor
heater and relay
circuits



ECM

P2255

Oxygen (A/F)
Sensor Reference
Ground Circuit Low
(Bank 2 Sensor 1)



Open or short in
A/F sensor (for
bank 1,2 sensor
1) circuit



A/F sensor (for
bank 1,2 sensor
1)



A/F sensor
heater (for bank
1, 2 sensor 1)



A/F relay



A/F sensor
heater and relay
circuits



ECM

Comes on

DTC stored

Applies

P2256

Oxygen (A/F)
Sensor Reference
Ground Circuit High
(Bank 2 Sensor 1)



Open or short in
A/F sensor (for
bank 1,2 sensor
1) circuit



A/F sensor (for
bank 1, 2 sensor
1)



A/F sensor
heater (for bank
1, 2 sensor 1)



A/F relay



A/F sensor
heater and relay
circuits



ECM

Comes on

DTC stored

Applies

P2401

Evaporative
Emission Leak



Canister pump Comes on

DTC stored

-

2008 Toyota Tundra

2008 ENGINE PERFORMANCE Engine Control System (2UZ-FE) - Tundra

Detection Pump
Stuck OFF

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

P2402

Evaporative
Emission Leak
Detection Pump
Stuck ON



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

-

P2419

Evaporative
Emission System
Switching Valve
Control Circuit Low



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



Connector/wire
harness
(Canister pump
module - ECM)

Comes on

DTC stored

-

2008 Toyota Tundra

2008 ENGINE PERFORMANCE Engine Control System (2UZ-FE) - Tundra



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



ECM

P2420

Evaporative
Emission System
Switching Valve
Control Circuit High



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



Connector/wire
harness
(Canister pump
module - ECM)



ECM

Comes on

DTC stored

-

P2431

Secondary Air
Injection System Air
Flow/Pressure
Sensor Circuit
Range/Performance
Bank 1



Pressure sensor



Open or short in
pressure sensor
circuit



ECM

Comes on

DTC stored

Applies

P2432

Secondary Air
Injection System Air
Flow/Pressure
Sensor Circuit Low
Bank 1



Pressure sensor



Open or short in
pressure sensor
circuit



ECM

Comes on

DTC stored

Applies

P2433

Secondary Air
Injection System Air
Flow/ Pressure
Sensor Circuit High
Bank 1



Pressure sensor



Open or short in
pressure sensor
circuit



ECM

Comes on

DTC stored

Applies

P2436

Secondary Air
Injection System Air
Flow/Pressure
Sensor Circuit
Range/Performance
Bank 2



Pressure sensor



Open or short in
pressure sensor
circuit



ECM

Comes on

DTC stored

Applies

P2437

Secondary Air
Injection System Air
Flow/Pressure



Pressure sensor



Open or short in

Comes on

DTC stored

Applies

2008 Toyota Tundra

2008 ENGINE PERFORMANCE Engine Control System (2UZ-FE) - Tundra

Sensor Circuit Low
Bank 2

pressure sensor
circuit



ECM

P2438

Secondary Air
Injection System Air
Flow/Pressure
Sensor Circuit High
Bank 2



Pressure sensor



Open or short in
pressure sensor
circuit



ECM

Comes on

DTC stored

Applies

P2440

Secondary Air
Injection System
Switching Valve
Stuck Open Bank 1



ASV



Open or short in
ASV circuit



Pressure sensor



Pressure sensor
circuit



Air Injection
Control Driver
(AID)



ECM

Comes on

DTC stored

Applies

P2441

Secondary Air
Injection System
Switching Valve
Stuck Close Bank 1



ASV



Open or short in
ASV circuit



Vacuum hose
(ASV - pressure
sensor)



Air injection
hose



Pressure sensor



Pressure sensor
circuit



Air Injection
Control Driver
(AID)



ECM

Comes on

DTC stored

Applies

P2442

Secondary Air
Injection System
Switching Valve
Stuck Open Bank 2



ASV



Open or short in
ASV circuit



Pressure sensor



Pressure sensor
circuit



Air Injection
Control Driver

Comes on

DTC stored

Applies

2008 Toyota Tundra

2008 ENGINE PERFORMANCE Engine Control System (2UZ-FE) - Tundra