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