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Toyota Tundra. Manual - part 1499
Short between
VC and VTA1
circuits
ECM
P0125
Insufficient Coolant
Temperature for
Closed Loop Fuel
Control
ECT sensor
Cooling system
Thermostat
Comes on
DTC stored
P0128
Coolant Thermostat
(Coolant Temperature
Below Thermostat
Regulating
Temperature)
Thermostat
Cooling system
ECT sensor
ECM
Comes on
DTC stored
P0136
Oxygen Sensor
Circuit Malfunction
(Bank 1 Sensor 2)
Open or short in
HO2 sensor (for
Bank 1) circuit
HO2 sensor (for
Bank 1)
HO2 sensor
heater (for Bank
1)
Air-fuel Ratio
(A/F) sensor
(for Bank 1)
Integration relay
Gas leakage
from exhaust
system
Comes on
DTC stored
P0137
Oxygen Sensor
Circuit Low Voltage
(Bank 1 Sensor 2)
Open in HO2
sensor (for Bank
1) circuit
HO2 sensor (for
Bank 1)
HO2 sensor
heater (for Bank
1)
Integration relay
Gas leakage
from exhaust
system
Comes on
DTC stored
P0138
Oxygen Sensor
Circuit High Voltage
(Bank 1 Sensor 2)
Short in HO2
sensor (for Bank
1) circuit
Comes on
DTC stored
2009 Toyota Tundra
2009 ENGINE PERFORMANCE Engine Control System (3UR-FBE) - Tundra