Toyota Tundra (2015 year). Manual — part 1904
The ECM continuously monitors the HO2 sensor output voltage while the engine is running. DTC P0138 or P0158 is stored if the HO2
sensor voltage output is more than 1.2 V for 10 seconds or more.
Heated Oxygen Sensor Output Voltage During Fuel Cut (P0139 or P0159)
The sensor output voltage drops to below 0.2 V (extremely lean status) immediately when the vehicle decelerates and fuel cut is
operating. If the voltage does not drop to below 0.2 V when accumulated intake air mass is more than 16.6 g, the system
determines that the sensor response has deteriorated, illuminates the MIL and stores a DTC.
ECM illuminates the MIL and stores a DTC.
MONITOR STRATEGY
Related DTCs
P0136: Heated oxygen sensor (for Bank 1) output voltage (Abnormal voltage output)
P0136: Heated oxygen sensor (for Bank 1) impedance (Low)
P0137: Heated oxygen sensor (for Bank 1) output voltage (Low voltage)
P0137: Heated oxygen sensor (for Bank 1) impedance (High)
P0138: Heated oxygen sensor (for Bank 1) output voltage (High voltage)
P0138: Heated oxygen sensor (for Bank 1) output voltage (Extremely high)
P0139: Heated oxygen sensor output voltage during fuel cut (for Bank 1)
P013A: Heated oxygen sensor response rate during fuel cut from rich condition
P013C: Heated oxygen sensor response rate during fuel cut from rich condition
P0156: Heated oxygen sensor (for Bank 2) output voltage (Abnormal voltage output)
P0156: Heated oxygen sensor (for Bank 2) impedance (Low)
P0157: Heated oxygen sensor (for Bank 2) output voltage (Low voltage)
P0157: Heated oxygen sensor (for Bank 2) impedance (High)
P0158: Heated oxygen sensor (for Bank 2) output voltage (High voltage)
P0158: Heated oxygen sensor (for Bank 2) output voltage (Extremely high)
P0159: Heated oxygen sensor output voltage during fuel cut (for Bank 2)
Required Sensors/Components
(Main)
Heated oxygen sensor
Required Sensors/Components
(Related)
Crankshaft position sensor, engine coolant temperature sensor, mass air flow meter and
throttle position sensor
(During fuel cut)
Continuous: Other
Duration
20 seconds: Active air-fuel ratio control detection
90 seconds: Heated oxygen sensor impedance (High)
30 seconds: Heated oxygen sensor impedance (Low)
10 seconds: Output voltage (Stuck high)
7 seconds: Heated oxygen sensor voltage (During fuel cut)
7 seconds: Heated oxygen sensor response rate during fuel cut from rich condition
MIL Operation
2 driving cycles: P0136, P0137, P0138, P0139, P0156, P0157, P0158 and P0159
1 driving cycle: P013A and P013C
TYPICAL ENABLING CONDITIONS
All:
Monitor runs whenever
following DTCs not present
P0016, P0018 (VVT system - Misalignment)
P0017, P0019 (Exhaust VVT system - Misalignment)
P0031, P0032, P0051, P0052, P101D, P103D (Air fuel ratio sensor heater)
P0037, P0038, P0057, P0058, P102D, P105D (Rear Oxygen Sensor Heater)
P0101, P0102, P0103 (Mass air flow meter)
P0112, P0113 (Intake air temperature sensor)
P0115, P0117, P0118 (Engine coolant temperature sensor)
3UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0136-P0139...
P0120, P0121, P0122, P0123, P0220, P0222, P0223, P2135 (Throttle position sensor)
P0125 (Insufficient Coolant Temperature for Closed Loop Fuel Control)
P0128 (Thermostat)
P014C, P014D, P014E, P014F, P015A, P015B, P015C, P015D, P2195, P2196, P2197, P2198, P2237,
P2238, P2239, P2240, P2241, P2242, P2252, P2253, P2255, P2256 (Air fuel ratio sensor)
P0171, P0172, P0174, P0175 (Fuel system)
P0301 - P0308 (Misfire)
P0335 (Crankshaft position sensor)
P0340, P1340 (Camshaft position sensor)
P0412, P0415, P0418, P0419, P1613, P1614 (Secondary Air Injection System Control)
P0451, P0452, P0453 (Evaporative Emission System Pressure Sensor)
P0500 (Vehicle speed sensor)
P219A, P219B, P219C, P219D, P219E, P219F, P21A0, P21A1, P21A2, P21A3 (Air-fuel ratio
imbalance)
P2440, P2441, P2442, P2443, P2444, P2445, P2446, P2447 (Secondary Air Injection System)
Heated Oxygen Sensor Output Voltage (Abnormal Voltage Output and Low Voltage):
Active air-fuel ratio control
Executing
Battery voltage
11 V or more
Atmospheric pressure
76 kPa (570 mmHg) or more
Engine coolant temperature
75°C (167°F) or more
Intake air temperature
-10°C (14°F) or more
Idling
OFF
Engine RPM
Less than 3200 rpm
A/F sensor status
Activated
Fuel system status
Closed loop
Engine load
10 to 75%
Heated Oxygen Sensor Impedance (Low):
Battery voltage
11 V or more
Estimated rear HO2 sensor temperature
Less than 700°C (1292°F)
ECM monitor
Completed
DTC P0607
Not set
Heated Oxygen Sensor Impedance (High):
Battery voltage
11 V or more
Estimated rear HO2 sensor temperature
450 to 750°C (842 to 1382°F)
DTC P0607
Not set
Heated Oxygen Sensor Output Voltage (Extremely High):
Battery voltage
11 V or more
Time after engine start
2 seconds or more
Heated Oxygen Sensor Output Voltage during fuel cut:
Engine coolant temperature
75°C (167°F) or higher
Estimated catalyst temperature
400°C (752°F) or higher
Fuel cut
ON
Heated Oxygen Sensor Response Rate during Fuel Cut from Rich Condition:
3UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0136-P0139...
Battery voltage
11 V or higher
Engine coolant temperature
75°C (167°F) or higher
Estimated catalyst temperature
400°C (752°F) or higher
Fuel cut
ON
TYPICAL MALFUNCTION THRESHOLDS
Heated Oxygen Sensor Output Voltage (Abnormal Voltage Output):
(a) Commanded air-fuel ratio
14.3 or less
(b) Rear HO2 sensor voltage
0.21 to 0.66 V
Heated Oxygen Sensor Output Voltage (Low):
(a) Commanded air-fuel ratio
14.3 or less
(b) Rear HO2 sensor voltage
Less than 0.21 V
(c) OSC
2.1 g or more
Heated Oxygen Sensor Impedance (Low):
Heated oxygen sensor impedance
Less than 5 Ω
Heated Oxygen Sensor Impedance (High):
Heated oxygen sensor impedance
15 kΩ or more
Heated Oxygen Sensor Output Voltage (Extremely High):
Heated oxygen sensor voltage
1.2 V or more
Heated Oxygen Sensor Output Voltage during fuel cut:
More than 16.6
g
Heated Oxygen Sensor Response Rate during Fuel Cut from Rich Condition:
Duration that heated oxygen sensor voltage drops from 0.35 to 0.2 V during fuel cut (Normalized)
0.5 second or more
COMPONENT OPERATING RANGE
Heated oxygen sensor voltage
Varies between 0.1 and 0.9 V
MONITOR RESULT
Refer to CHECKING MONITOR STATUS
.
CONFIRMATION DRIVING PATTERN
P0136, P0137, P0138, P0156, P0157 and P0158
3UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0136-P0139...
Connect the Techstream to the DLC3.
1.
Turn the ignition switch to ON and turn the Techstream on.
2.
Clear the DTCs (even if no DTCs are stored, perform the clear DTC operation).
3.
Turn the ignition switch off and wait for at least 30 seconds.
4.
Turn the ignition switch to ON and turn the Techstream on [A].
5.
Start the engine and warm it up until the ECT reaches 75°C (167°F) or higher [B].
6.
With the transmission in 4th gear or higher, drive the vehicle at 60 to 120 km/h (40 to 75 mph) for 10 minutes or more
[C].
7.
Enter the following menus: Powertrain / Engine and ECT / Trouble Codes [D].
8.
Read the Pending DTCs.
HINT:
If a pending DTC is output, the system is malfunctioning.
If a pending DTC is not output, perform the following procedure.
9.
Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.
10.
Input the DTC: P0136, P0137, P0138, P0156, P0157, or P0158.
11.
Check the DTC judgment result.
TESTER DISPLAY
DESCRIPTION
NORMAL
DTC judgment completed
System normal
ABNORMAL
DTC judgment completed
System abnormal
INCOMPLETE
DTC judgment not completed
Perform driving pattern after confirming DTC enabling conditions
N/A
Unable to perform DTC judgment
When performing the confirmation driving pattern, obey all speed limits and traffic laws.
HINT:
If the judgment result shows ABNORMAL, the system has a malfunction.
If the judgment result shows INCOMPLETE or N/A, perform steps [C] and [D].
12.
If no pending DTC is output, perform a universal trip and check for permanent DTCs
.
HINT:
If a permanent DTC is output, the system is malfunctioning.
If no permanent DTC is output, the system is normal.
13.
P0139, P013A, P013C and P0159
3UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0136-P0139...
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