Toyota Tundra (2015 year). Manual — part 1111
Last Modified: 9-16-2014
6.6 C
Doc ID: RM000000PFA0X6X
Model Year: 2015
Model: Tundra
Prod Date Range: [08/2014 - ]
Title: 1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM:
P0037,P0038,P0057,P0058,P0141,P0161,P102D,P105D; Oxygen Sensor Heater Control Circuit Low (Bank 1
Sensor 2); 2015 MY Tundra [08/2014 - ]
DTC
P0037
Oxygen Sensor Heater Control Circuit Low (Bank 1 Sensor 2)
DTC
P0038
Oxygen Sensor Heater Control Circuit High (Bank 1 Sensor 2)
DTC
P0057
Oxygen Sensor Heater Control Circuit Low (Bank 2 Sensor 2)
DTC
P0058
Oxygen Sensor Heater Control Circuit High (Bank 2 Sensor 2)
DTC
P0141
Oxygen Sensor Heater Circuit (Bank 1 Sensor 2)
DTC
P0161
Oxygen Sensor Heater Circuit (Bank 2 Sensor 2)
DTC
P102D
O2 Sensor Heater Circuit Performance Bank 1 Sensor 2 Stuck ON
DTC
P105D
O2 Sensor Heater Circuit Performance Bank 2 Sensor 2 Stuck ON
DESCRIPTION
Refer to DTC P0136
.
HINT:
DTC
NO.
DTC DETECTION CONDITION
TROUBLE AREA
P0037
P0057
The heater current is less than the specified value while the
heater is operating.
(1 trip detection logic)
Open in HO2 sensor heater
circuit
HO2 sensor heater (for Sensor
2)
Integration relay
ECM
P0038
P0058
The heater current is higher than the specified value while
the heater is operating.
(1 trip detection logic)
Short in HO2 sensor heater
circuit
HO2 sensor heater (for Sensor
2)
Integration relay
ECM
P0141
P0161
The cumulative heater resistance correction value exceeds
the threshold.
(2 trip detection logic)
Open or short in HO2 sensor
heater circuit
HO2 sensor heater (for Sensor
2)
Integration relay
ECM
P102D
P105D
The heater current is higher than the specified value while
the heater is not operating.
(1 trip detection logic)
ECM
MONITOR DESCRIPTION
1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0037,P0038,...
Heated oxygen sensor heater range check (P0037, P0038, P0057,
P0058, P102D and P105D):
The ECM monitors the current applied to the HO2 sensor heater to check the heater for malfunctions.
If the heater current is outside the normal range, the signal transmitted by the HO2 sensor becomes inaccurate.
When the current in the HO2 sensor heater is outside the normal operating range, the ECM interprets this as a
malfunction in the sensor heater and stores a DTC.
Heated oxygen sensor heater performance (P0141 and P0161):
After the accumulated heater ON time exceeds 100 seconds, the ECM calculates the heater resistance using the
battery voltage and the current applied to the heater.
If the resistance is above the threshold value, the ECM determines that there is a malfunction in the HO2 sensor
heater and stores DTC P0141 or P0161.
MONITOR STRATEGY
Related DTCs
P0037: Heated oxygen sensor heater (for Bank 1) range check (Low
electrical current)
P0038: Heated oxygen sensor heater (for Bank 1) range check (High
electrical current)
P0057: Heated oxygen sensor heater (for Bank 2) range check (Low
electrical current)
P0058: Heated oxygen sensor heater (for Bank 2) range check (High
electrical current)
P0141: Heated oxygen sensor heater performance (for Bank 1)
P0161: Heated oxygen sensor heater performance (for Bank 2)
P102D: Heated oxygen sensor heater stuck ON (for Bank 1 Sensor 2)
P105D: Heated oxygen sensor heater stuck ON (for Bank 2 Sensor 2)
Required Sensors/Components
(Main)
Heated oxygen sensor heater
Required Sensors/Components
(Related)
-
Once per driving cycle: P0141 and P0161
Duration
0.5 seconds: P0037 and P0057
Within 3 seconds: P0038 and P0058
10 seconds: P0141 and P0161
0.5 seconds: P102D and P105D
MIL Operation
Immediate: P0037, P0038, P0057, P0058, P102D and P105D
2 driving cycles: P0141 and P0161
1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0037,P0038,...
TYPICAL ENABLING CONDITIONS
P0037 and P0057 (Case 1)
Monitor runs whenever following DTCs not stored
P0038, P0058 (Rear oxygen sensor heater)
Battery voltage
10.5 V or higher
Engine
Running
Starter
OFF
Catalyst active A/F control
Not operating
Time after heater ON
10 seconds or more
Learned heater OFF current operation
Complete
Heater OFF current operation
Succeeded
Heater ON current - Learned heater OFF current
0.3 A or less
Heater output
ON
P0037 and P0057 (Case 2)
Monitor runs whenever following DTCs not stored
P0038, P0058 (Rear oxygen sensor heater)
Battery voltage
10.5 V or higher
Engine
Running
Starter
OFF
Catalyst active A/F control
Not operating
Time after heater ON
10 seconds or more
Learned heater OFF current operation
Complete
Heated oxygen sensor heater OFF current
Higher than 3.5 A
Hybrid IC high current limiter port
Fail
P0038 and P0058
Monitor runs whenever following DTCs not stored
None
Battery voltage
10.5 V or higher
Engine
Running
Starter
OFF
Catalyst active A/F control
Not operating
Time after heater ON
10 seconds or more
Learned heater OFF current operation
Complete
P0141 and P0161 (Case 1)
Monitor runs whenever following DTCs not
stored
P0037, P0038, P0057, P0058, P102D, P105D (Rear oxygen
sensor heater)
1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0037,P0038,...
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