Toyota Stove DTC P0135 User Manual

DI–56  
DIAGNOSTICS  
ENGINE  
DI1ED–07  
DTC  
P0135 Heated Oxygen Sensor Heater Circuit  
Malfunction (Bank1 Sensor1)  
DTC  
P0141 Heated Oxygen Sensor Heated Circuit  
Malfunction (Bank1 Sensor2)  
CIRCUIT DESCRIPTION  
Refer to DTC P0125 (Insufficient Coolant Temp. for Closed Loop Fuel Control) on page DI–44.  
DTC No.  
DTCDetectingCondition  
TroubleArea  
When the heater operates, heater current exceeds 2 A  
(2 trip detection logic)  
S Open or short in heater circuit of heated oxygen sensor  
P0135  
P0141  
S Heated oxygen sensor heater  
Heater current of 0.2 A or less when the heater operates  
(2 trip detection logic)  
S ECM  
HINT:  
S
S
S
Bank 1 refers to the bank that includes cylinder No.1.  
Sensor 1 refers to the sensor closer to the engine body.  
Sensor 2 refers to the sensor farther away from the engine body.  
WIRING DIAGRAM  
Refer to DTC P0125 on page DI–44 for the WIRING DIAGRAM.  
INSPECTION PROCEDURE  
HINT:  
Read freeze frame data using TOYOTA hand–held tester or OBD II scan tool. Because freeze frame records  
the engine conditions when the malfunction is detected, when troubleshooting it is useful for determining  
whether the vehicle was running or stopped, the engine warmed up or not, the air–fuel ratio lean or rich, etc.  
at the time of the malfunction.  
2000 CELICA (RM744U)  
 
 

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