| DTC Code | DTC Name |
|---|---|
| P013616 | A/F (O2) Sensor Circuit Bank 1 Sensor 2 Circuit Current (Voltage) Below Threshold |
| P013A7C | A/F Sensor - Rich to Lean Bank 1 Sensor 2 Slow Response |
DESCRIPTION
Refer to DTC P003612.
Although the DTC title say O2 sensor, this DTC relate to the air fuel ratio sensor (sensor 2).
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Memory | Note |
|---|---|---|---|---|---|---|
| P013616 | A/F (O2) Sensor Circuit Bank 1 Sensor 2 Circuit Current (Voltage) Below Threshold | Either of the following conditions is met (2 trip detection logic).
|
|
Comes on | DTC stored | SAE Code: P0136 |
| P013A7C | A/F Sensor - Rich to Lean Bank 1 Sensor 2 Slow Response | During a fuel cut, the amount of time it takes for the current of the air fuel ratio sensor (sensor 2) to increase to a certain amount is equal to or greater than the threshold (1 trip detection logic). |
|
Comes on | DTC stored | SAE Code: P013A |
MONITOR DESCRIPTION
Active Air fuel Ratio Control
The ECM usually performs air fuel ratio feedback control so that the air fuel ratio sensors output indicates a near stoichiometric air fuel ratio. This vehicle includes active air fuel ratio control in addition to regular air fuel ratio control. The ECM performs active air fuel ratio control to detect any deterioration in the Three-Way Catalytic Converter (TWC) and any malfunctions of the air fuel ratio sensor (sensor 2) (refer to the diagram below).
Active air fuel ratio control is performed for approximately 30 seconds while driving with a warm engine. During active air fuel ratio control, the air fuel ratio is forcibly regulated to become lean or rich by the ECM. If the ECM detects a malfunction, a DTC is stored.
Abnormal Air Fuel Ratio Sensor (Sensor 2) Output Current (DTC P013616)
Case 1: The ECM illuminates the MIL and stores a DTC when active rich air-fuel ratio control is being performed and the air fuel ratio sensor (sensor 2) current is 6 mA or more.
Case 2: The ECM illuminates the MIL and stores a DTC when active rich air-fuel ratio control is being performed, the oxygen storage capacity of the catalyst is more than 2.0 g and the air fuel ratio sensor (sensor 2) current is -0.25757 mA or more.
Abnormal Air Fuel Ratio Sensor (Sensor 2) Output Current During Fuel-cut from Rich Condition (DTC P013A7C)
During a fuel cut, if the amount of time it takes for the current of the air fuel ratio sensor (sensor 2) to increase to a certain amount is equal to or greater than the threshold, the responsiveness of the air fuel ratio sensor (sensor 2) is judged as degraded, the ECM illuminates the MIL and stores a DTC.
MONITOR STRATEGY
| Required Sensors/Components (Main) | Air fuel ratio sensor (sensor 2) |
| Required Sensors/Components (Related) | Crankshaft position sensor Engine coolant temperature sensor Mass air flow meter sub-assembly Throttle position sensor Air fuel ratio sensor (sensor 1) |
| Frequency of Operation | Once per driving cycle |
TYPICAL ENABLING CONDITIONS
| Battery voltage | 11 V or higher |
| Intake air temperature | -10°C (14°F) or higher |
| Engine coolant temperature | 75°C (167°F) or higher |
| Atmospheric pressure | 76 kPa(abs) [11.02 psi(abs)] or higher |
| Idling | Off |
| Engine speed | Less than 3200 rpm |
| Air fuel ratio sensor (sensor 1) status | Activated |
| Fuel system status | Closed loop |
| Engine load | 10% or higher, and less than 100% |
| Battery voltage | 11 V or higher |
| Engine coolant temperature | 75°C (167°F) or higher |
| Catalyst temperature | 400°C (752°F) or higher |
| Fuel cut | On |
TYPICAL MALFUNCTION THRESHOLDS
| Both of the following conditions are met | A and B |
| A. Continuous time of active rich air fuel ratio control*1 | 0.5 seconds or more |
| *1: Target air fuel ratio | 14.3 or less |
| B. Either of the following conditions is met | (a) or (b) |
| (a) Air fuel ratio sensor (sensor 2) current | 6 mA or more |
| (b) OSC (Oxygen Storage Capacity) of catalyst | More than 2.0 g |
| The amount of time it takes for the current of the air fuel ratio sensor (sensor 2) to increase to a certain amount during a fuel cut (Normalized) | 1 or more |
CONFIRMATION DRIVING PATTERN
This confirmation driving pattern is used for the "Perform Confirmation Driving Pattern" procedure of the following diagnostic troubleshooting procedure.
Performing this confirmation driving pattern will activate the air fuel ratio sensor (sensor 2) monitor (the catalyst monitor is performed simultaneously). This is very useful for verifying the completion of a repair.
Connect the GTS to the DLC3.
Turn the engine switch on (IG).
Turn the GTS on.
Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
Turn the engine switch off and wait for at least 30 seconds.
Turn the engine switch on (IG) [A].
Turn the GTS on.
Start the engine and warm it up until the engine coolant temperature is 75°C (167°F) or higher with the shift lever in P [B].
Drive the vehicle at 75 to 120 km/h (46 to 75 mph) for 10 minutes or more [C].
When performing the confirmation driving pattern, obey all speed limits and traffic laws.
Enter the following menus: Powertrain / Engine / Trouble Codes [D].
Read the pending DTCs.
If a pending DTC is output, the system is malfunctioning.
If a pending DTC is not output, perform the following procedure.
Enter the following menus: Powertrain / Engine / Utility / All Readiness.
Input the DTC: P013616.
Check the DTC judgment result.
| GTS Display | Description |
|---|---|
| NORMAL |
|
| ABNORMAL |
|
| INCOMPLETE |
|
If the judgment result is NORMAL, the system is normal.
If the judgment result is ABNORMAL, the system is malfunctioning.
If the judgment result is INCOMPLETE, perform steps [C] through [D] again.
Connect the GTS to the DLC3.
Turn the engine switch on (IG).
Turn the GTS on.
Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
Turn the engine switch off and wait for at least 30 seconds.
Turn the engine switch on (IG).
Turn the GTS on.
Start the engine and warm it up until the engine coolant temperature is 75°C (167°F) or higher with the shift lever in P [A].
In order to keep the idle stable, turn off the A/C and all other electric loads and do not perform any shift operations.
Drive the vehicle at approximately 75 km/h (46 mph) for 10 minutes or more [B].
When performing the confirmation driving pattern, obey all speed limits and traffic laws.
Drive the vehicle while keeping the engine load as constant as possible.
With the shift lever in S, drive the vehicle at 75 km/h (46 mph), and then decelerate the vehicle by releasing the accelerator pedal for 5 seconds or more to perform the fuel-cut [C].
When performing the confirmation driving pattern, obey all speed limits and traffic laws.
Repeat step [C] 2 times or more in one driving cycle.
Enter the following menus: Powertrain / Engine / Trouble Codes / [D].
Read the pending DTCs.
If a pending DTC is output, the system is malfunctioning.
If a pending DTC is not output, perform the following procedure.
Enter the following menus: Powertrain / Engine / Utility / All Readiness.
Input the DTC: P013A7C.
Check the DTC judgment result.
| GTS Display | Description |
|---|---|
| NORMAL |
|
| ABNORMAL |
|
| INCOMPLETE |
|
If the judgment result is NORMAL, the system is normal.
If the judgment result is ABNORMAL, the system is malfunctioning.
If the judgment result is INCOMPLETE, drive the vehicle with the shift lever in S, and then perform step [C] again.
CAUTION / NOTICE / HINT
Malfunctioning areas can be identified by performing the Active Test "Control the Injection Volume for A/F Sensor". This Active Test can help to determine whether the air fuel ratio sensors (sensor 1 and sensor 2) and other potential trouble areas are malfunctioning.
The following procedure describes how to perform the Active Test "Control the Injection Volume for A/F Sensor" using the GTS.
Connect the GTS to the DLC3.
Turn the engine switch on (IG).
Turn the GTS on.
Start the engine and warm it up until the engine coolant temperature is 75°C (167°F) or higher.
Warm up the air fuel ratio sensors at an engine speed of 2500 rpm for 90 seconds.
Enter the following menus: Powertrain / Engine / Active Test / Control the Injection Volume for A/F Sensor / Data List / A/F (O2) Sensor Current B1S1 and A/F (O2) Sensor Current B1S2.
Perform the Active Test with the engine idling (change the fuel injection volume).
Monitor the output current of the air fuel ratio sensor (sensor 1) (A/F (O2) Sensor Current B1S1) and air fuel ratio sensor (sensor 2) (A/F (O2) Sensor Current B1S2) displayed on the GTS.
The Active Test "Control the Injection Volume for A/F Sensor" can be used to lower the fuel injection volume by 12.5% or increase the injection volume by 12.5%.
Each sensor reacts in accordance with the increase and decrease in the fuel injection volume.
| GTS Display (Sensor) | Injection Volume | Status | Current |
|---|---|---|---|
| A/F (O2) Sensor Current B1S1 (Air fuel ratio sensor (sensor 1)) |
12.5% | Rich | Below -0.075 mA |
| -12.5% | Lean | More than 0.037 mA | |
| A/F (O2) Sensor Current B1S2 (Air fuel ratio sensor (sensor 2)) |
12.5% | Rich | Below -0.86 mA |
| -12.5% | Lean | More than 0.33 mA |
The air fuel ratio sensor (sensor 1) has an output delay of a few seconds and the air fuel ratio sensor (sensor 2) has a maximum output delay of approximately 20 seconds.
Performing the Active Test "Control the Injection Volume for A/F Sensor" allows the output value of the air fuel ratio sensors (sensor 1 and sensor 2) to be checked and graphed.
Inspect the fuses for circuits related to this system before performing the following procedure.
Sensor 1 refers to the sensor closest to the engine assembly.
Sensor 2 refers to the sensor farthest away from the engine assembly.
Read Freeze Frame Data using the GTS. The ECM records vehicle and driving condition information as Freeze Frame Data the moment a DTC is stored. When troubleshooting, Freeze Frame Data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.
PROCEDURE
CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P013616 AND P013A7C)
Connect the GTS to the DLC3.
Turn the engine switch on (IG).
Turn the GTS on.
Enter the following menus: Powertrain / Engine / Trouble Codes.
Read the DTCs.
| Result | ||||||||
|---|---|---|---|---|---|---|---|---|
|
If any DTCs other than P013616 or P013A7C are output, troubleshoot those DTCs first.
GO TO DTC CHARTClick here
PERFORM ACTIVE TEST USING GTS (CONTROL THE INJECTION VOLUME FOR A/F SENSOR)
Connect the GTS to the DLC3.
Turn the engine switch on (IG).
Turn the GTS on.
Start the engine and warm it up until the engine coolant temperature reaches 75°C (167°F) or higher.
Warm up the air fuel ratio sensors at an engine speed of 2500 rpm for 90 seconds.
Enter the following menus: Powertrain / Engine / Active Test / Control the Injection Volume for A/F Sensor / Data List / Coolant Temperature, A/F (O2) Sensor Current B1S1 and A/F (O2) Sensor Current B1S2.
| Active Test Display |
|---|
| Control the Injection Volume for A/F Sensor |
| Data List Display |
|---|
| Coolant Temperature |
| A/F (O2) Sensor Current B1S1 |
| A/F (O2) Sensor Current B1S2 |
Perform the Control the Injection Volume for A/F Sensor operation with the engine idling.
Monitor the output values of the air fuel ratio sensor (sensor 1) and air fuel ratio sensor (sensor 2) (A/F (O2) Sensor Current B1S1 and A/F (O2) Sensor Current B1S2) displayed on the GTS.
The Control the Injection Volume for A/F Sensor operation lowers the fuel injection volume by 12.5% or increases the injection volume by 12.5%.
The air fuel ratio sensor (sensor 1) has an output delay of a few seconds and the air fuel ratio sensor (sensor 2) has a maximum output delay of approximately 20 seconds.
If the sensor output value does not change (almost no reaction) while performing the Active Test, the sensor may be malfunctioning.
| GTS Display (Sensor) | Injection Volume | Status | Current |
|---|---|---|---|
| A/F (O2) Sensor Current B1S1 (Air fuel ratio (sensor 1)) |
12.5% | Rich | Below -0.075 mA |
| -12.5% | Lean | More than 0.037 mA | |
| A/F (O2) Sensor Current B1S2 (Air fuel ratio (sensor 2)) |
12.5% | Rich | Below -0.86 mA |
| -12.5% | Lean | More than 0.33 mA |
| Result | |||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Lean: During the Control the Injection Volume for A/F Sensor Active Test, the air fuel ratio sensor (sensor 1) output current (A/F (O2) Sensor Current B1S1) is consistently more than 0.037 mA, and the air fuel ratio sensor (sensor 2) output current (A/F (O2) Sensor Current B1S2) is consistently more than 0.33 mA.
Rich: During the Control the Injection Volume for A/F Sensor Active Test, the air fuel ratio sensor (sensor 1) output current (A/F (O2) Sensor Current B1S1) is consistently below -0.075 mA, and the air fuel ratio sensor (sensor 2) output current (A/F (O2) Sensor Current B1S2) is consistently below -0.86 mA.
Lean/Rich: During the Control the Injection Volume for A/F Sensor Active Test, the output current of the air fuel ratio sensor (sensor 1) or air fuel ratio sensor (sensor 2) alternate correctly.
Refer to "Data List / Active Test" [A/F (O2) Sensor Current B1S1, A/F (O2) Sensor Current B1S2].
REPLACE AIR FUEL RATIO SENSOR (SENSOR 2)
Replace the air fuel ratio sensor (sensor 2).
Perform "Inspection After Repair" after replacing the air fuel ratio sensor (sensor 2).
| Result | ||
|---|---|---|
|
CLEAR DTC
Connect the GTS to the DLC3.
Turn the engine switch on (IG).
Turn the GTS on.
Clear the DTCs.
Turn the engine switch off and wait for at least 30 seconds.
| Result | ||
|---|---|---|
|
CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED
Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.
Enter the following menus: Powertrain / Engine / Utility / All Readiness.
| Tester Display |
|---|
| All Readiness |
Input the DTC: P013616.
Check the DTC judgment result.
| GTS Display | Description |
|---|---|
| NORMAL |
|
| ABNORMAL |
|
| INCOMPLETE |
|
| Result | ||
|---|---|---|
|
END
CHECK FOR EXHAUST GAS LEAK
Check for exhaust gas leaks.
| OK |
|---|
| No gas leaks in exhaust system. |
| Result | |||
|---|---|---|---|
|
REPAIR OR REPLACE EXHAUST SYSTEM
PERFORM ACTIVE TEST USING GTS (CONTROL THE EGR STEP POSITION)
Connect the GTS to the DLC3.
Turn the engine switch on (IG).
Turn the GTS on.
Start the engine and warm it up until the engine coolant temperature is 75°C (167°F) or higher.
The A/C switch and all accessories should be off.
Enter the following menus: Powertrain / Engine / Active Test / Control the EGR Step Position / Data List / Engine Speed, Intake Manifold Absolute Pressure and Coolant Temperature.
| Active Test Display |
|---|
| Control the EGR Step Position |
| Data List Display |
|---|
| Engine Speed |
| Intake Manifold Absolute Pressure |
| Coolant Temperature |
Check the engine idling condition and Intake Manifold Absolute Pressure values in the Data List while performing the Active Test.
Do not leave the EGR valve open for 10 seconds or more during the Active Test.
Be sure to return the EGR valve to step 0 when the Active Test is completed.
Do not open the EGR valve 30 steps or more during the Active Test.
| OK |
|---|
| The value of Intake Manifold Absolute Pressure and Engine Speed change in response to EGR step position. |
| Standard | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|
|||||||||||
During Active Test, if the idling condition does not change in response to EGR step position, then there is probably a malfunction in the EGR valve.
| Result | |||
|---|---|---|---|
|
GO TO STEP 9
INSPECT EGR VALVE ASSEMBLY
Remove the EGR valve assembly.
Check if the EGR valve is stuck open.
| OK |
|---|
| EGR valve is tightly closed. |
| Result | |||
|---|---|---|---|
|
REPLACE EGR VALVE ASSEMBLYClick here
CHECK CAUSE OF EXTREMELY RICH OR LEAN ACTUAL AIR FUEL RATIO
Check the cause of extremely rich or lean actual air fuel ratio, referring to the DTC P017100 and P017200 Inspection Procedure.
| Result | ||
|---|---|---|
|
GO TO STEP 12
CHECK FOR EXHAUST GAS LEAK
Check for exhaust gas leaks.
| OK |
|---|
| No gas leaks in exhaust system. |
Perform "Inspection After Repair" after repairing or replacing the exhaust system.
Perform "Inspection After Repair" after replacing the air fuel ratio sensor (sensor 2).
| Result | |||
|---|---|---|---|
|
REPLACE AIR FUEL RATIO SENSOR (SENSOR 2)Click here
REPAIR OR REPLACE EXHAUST SYSTEM
REPLACE AIR FUEL RATIO SENSOR (SENSOR 1)
Replace the air fuel ratio sensor (sensor 1).
Perform "Inspection After Repair" after replacing the air fuel ratio sensor (sensor 1).
| Result | ||
|---|---|---|
|
CLEAR DTC
Connect the GTS to the DLC3.
Turn the engine switch on (IG).
Turn the GTS on.
Clear the DTCs.
Turn the engine switch off and wait for at least 30 seconds.
| Result | ||
|---|---|---|
|
CHECK WHETHER DTC OUTPUT RECURS (DTC P013616)
Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.
Enter the following menus: Powertrain / Engine / Utility / All Readiness.
| Tester Display |
|---|
| All Readiness |
Input the DTC: P013616.
Check that the DTC judgment result is NORMAL. If the DTC judgment result is INCOMPLETE, perform the confirmation drive pattern again but increase the vehicle speed.
| Result | ||||||
|---|---|---|---|---|---|---|
|
Perform "Inspection After Repair" after replacing the air fuel ratio sensor (sensor 2).
END
REPLACE AIR FUEL RATIO SENSOR (SENSOR 2)Click here
CHECK FOR EXHAUST GAS LEAK
Check for exhaust gas leaks.
| OK |
|---|
| No gas leaks in exhaust system. |
| Result | |||
|---|---|---|---|
|
REPAIR OR REPLACE EXHAUST SYSTEM
CLEAR DTC
Connect the GTS to the DLC3.
Turn the engine switch on (IG).
Turn the GTS on.
Clear the DTCs.
Turn the engine switch off and wait for at least 30 seconds.
| Result | ||
|---|---|---|
|
CHECK WHETHER DTC OUTPUT RECURS (DTC P013A7C)
Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.
Enter the following menus: Powertrain / Engine / Utility / All Readiness.
| Tester Display |
|---|
| All Readiness |
Input the DTC: P013A7C.
Check that the DTC judgment result is NORMAL. If the DTC judgment result is INCOMPLETE, perform the confirmation drive pattern again but increase the vehicle speed.
| Result | ||||||
|---|---|---|---|---|---|---|
|
Perform "Inspection After Repair" after replacing the air fuel ratio sensor (sensor 2).
CHECK FOR INTERMITTENT PROBLEMSClick here
REPLACE AIR FUEL RATIO SENSOR (SENSOR 2)Click here