P0130, P0134

DTC Code	DTC Name
P0130	Oxygen Sensor Circuit Malfunction (Bank 1 Sensor 1)
P0134	Oxygen Sensor Circuit No Activity Detected (Bank 1 Sensor 1)

DESCRIPTION

In order to obtain a high purification rate for the carbon monoxide (CO), hydrocarbon (HC) and nitrogen oxide (NOx) components in the exhaust gas, a Three-Way Catalytic Converter (TWC) is used. For the most efficient use of the TWC, the air fuel ratio must be precisely controlled so that it is always close to the stoichiometric air fuel ratio. The heated oxygen sensor has the characteristic whereby its output voltage changes suddenly in the vicinity of the stoichiometric air fuel ratio. This is used to detect the oxygen concentration in the exhaust gas and provide the ECM with feedback to control the air fuel ratio. When the air fuel ratio becomes lean, the oxygen concentration in the exhaust gas increases. The heated oxygen sensor informs the ECM of the lean condition (low voltage, i.e. less than 0.45 V). When the air fuel ratio is richer than the stoichiometric air fuel level, the oxygen concentration in the exhaust gas is reduced, and the heated oxygen sensor informs the ECM of the rich condition (high voltage, i.e. more than 0.45 V). The ECM judges, using the voltage output of the heated oxygen sensor, whether the air fuel ratio is rich or lean and controls the injection time accordingly. If a malfunction of the heated oxygen sensor causes an output of abnormal voltage, the ECM is unable to perform accurate air fuel ratio control. The heated oxygen sensor includes a heater which heats the zirconia element. The heater is controlled by the ECM. When the intake air volume is low (the temperature of the exhaust gas is low), a current flows to the heater in order to heat the sensor for accurate oxygen concentration detection.

DTC No.	DTC Detection Condition	Trouble Area
P0130	Both conditions below continue for 20 seconds during air fuel ratio feedback control (3 trip detection logic). Heated oxygen sensor output voltage is less than 0.06 V. No. 2 heated oxygen sensor output voltage is 0.5 V or more.	Short to GND in heated oxygen sensor circuit Heated oxygen sensor ECM
P0130	Heated oxygen sensor output voltage is less than 0.06 V within 1 second after engine was started with engine coolant temperature less than 40°C (104°F) or less (last engine operation was stopped after warm-up). (3 trip detection logic)	Short to GND in heated oxygen sensor circuit Heated oxygen sensor ECM
P0130	Both conditions below continue for 20 seconds during air fuel ratio feedback control (3 trip detection logic). No. 2 heated oxygen sensor output voltage is less than 0.1 V. Heated oxygen sensor output voltage is between 0.6 V and 1.5 V.	Heated oxygen sensor
P0134	Heated oxygen sensor output voltage is between 0.4 V and 0.6 V for 20 seconds or more (3 trip detection logic).	Open in heated oxygen sensor circuit Heated oxygen sensor
P0134	All of the conditions below are met (3 trip detection logic). Heated oxygen sensor output voltage is more than 0.2 V. No. 2 heated oxygen sensor output voltage is more than 0.2 V. Fuel cut is performed for 3 seconds or more.	Open or short in heated oxygen sensor circuit Heated oxygen sensor ECM
P0134	ECM determines that internal resistance of heated oxygen sensor is more than 20 kΩ (3 trip detection logic).	Open in heated oxygen sensor circuit Heated oxygen sensor

Tech Tips

The internal resistance of the heated oxygen sensor cannot be measured using the tester.
The output voltage of the heated oxygen sensor and the short-term fuel trim value can be read using the intelligent tester.

WIRING DIAGRAM

CONFIRMATION DRIVING PATTERN

CAUTION:

When performing the confirmation driving pattern, obey all speed limits and traffic laws.

DTC P0130 is detected when the vehicle is driven with a city driving pattern at an average vehicle speed of approximately 50 km/h (31 mph) for approximately 30 minutes.
DTC P0134 is detected when the vehicle is driven with a city driving pattern at an average vehicle speed of approximately 50 km/h (31 mph) for approximately 30 minutes.

CAUTION / NOTICE / HINT

Tech Tips

It is possible that the malfunctioning area can be found using the Active Test. The Active Test can determine if the heated oxygen sensor or other potential trouble areas are malfunctioning or not.

The injection volume can be switched to -12.5% (decrease) or +12.5% (increase) by the Active Test.

The Active Test procedure enables a technician to check and graph the output voltage of the heated oxygen sensors.

Procedure:

Connect the intelligent tester to the DLC3.
Turn the ignition switch to ON.
Turn the tester on.
Warm up the engine by running the engine at 2500 rpm for approximately 90 seconds.
Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the Injection Volume for A/F Sensor.
Perform the Active Test while the engine is idling (press the RIGHT or LEFT button to change the fuel injection volume).
Monitor the output voltages of the heated oxygen sensor and No. 2 heated oxygen sensor (O2S B1S1 and O2S B1S2) displayed on the tester.

Standard
The heated oxygen sensors reacts in accordance with the increase and decrease of injection volume:
+12.5% → Rich output: Higher than 0.55 V
-12.5% → Lean output: Below 0.4 V

Note

The heated oxygen sensor has an output delay of a few seconds and the No. 2 heated oxygen sensor has a maximum output delay of 20 seconds.
If the vehicle is short on fuel, the air fuel ratio becomes lean and DTCs will be stored.

The following procedure enables the technician to check and graph the voltage outputs of both the heated oxygen sensors.

To display the graph, enter the following menus: Powertrain / Engine and ECT / Active Test / Control the Injection Volume for A/F Sensor / O2S B1S1 and O2S B1S2; then press the view button.

Note

Perform electronic throttle learning after replacing the ECM Click here.
Inspect the fuses for circuits related to this system before performing the following inspection procedure.

Tech Tips

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 intelligent tester. Freeze frame data records the engine condition when malfunctions are detected. 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

READ VALUE USING INTELLIGENT TESTER (O2S B1S1)
1. Connect the intelligent tester to the DLC3.
2. Start the engine.
3. Turn the tester on.
4. Enter the following menus: Powertrain / Engine and ECT / Data List / O2S B1S1.
5. Warm up the heated oxygen sensor at an engine speed of 2500 rpm for approximately 90 seconds.
6. Read the output voltage of the heated oxygen sensor during engine idling.
  
  Standard voltage
  
  Fluctuates between less than 0.4 V and more than 0.55 V (see the following figure).
  
  *1 0.55 V
  
  *2 0.4 V
NG
CHECK HARNESS AND CONNECTOR (HEATED OXYGEN SENSOR - ECM) Click here

OK

Standard voltage
Fluctuates between less than 0.4 V and more than 0.55 V (see the following figure).

*1	0.55 V
*2	0.4 V

CHECK WHETHER DTC OUTPUT RECURS (DTC P0130 OR P0134)

Connect the intelligent tester to the DLC3.
Turn the ignition switch to ON.
Turn the tester on.
Clear DTCs Click here.
Turn the ignition switch off and wait for 30 seconds.
Turn the ignition switch to ON.
Turn the tester on.
Start the engine and warm it up.
Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.
Enter the following menus: Powertrain / Engine and ECT / DTC.

Read pending DTCs.

Result
Result	Proceed to
DTC P0130 and/or P0134 is output	A
DTC is not output	B

B

CHECK FOR INTERMITTENT PROBLEMS Click here

A

REPLACE HEATED OXYGEN SENSOR
1. Replace heated oxygen sensor Click here.
NEXT

CHECK WHETHER DTC OUTPUT RECURS (DTC P0130 OR P0134)

Connect the intelligent tester to the DLC3.
Turn the ignition switch to ON.
Turn the tester on.
Clear DTCs Click here.
Turn the ignition switch off and wait for 30 seconds.
Turn the ignition switch to ON.
Turn the tester on.
Start the engine and warm it up.
Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.
Enter the following menus: Powertrain / Engine and ECT / DTC.

Read the pending DTCs.

Result
Result	Proceed to
DTC P0130 and/or P0134 is output	A
DTC is not output	B

A

REPLACE ECM Click here

B

END

CHECK HARNESS AND CONNECTOR (HEATED OXYGEN SENSOR - ECM)

Disconnect the heated oxygen sensor connector.
Disconnect the ECM connector.

Measure the resistance according to the value(s) in the table below.

Standard Resistance

Tester Connection	Condition	Specified Condition
B37-3 (OX1A) - B87-34 (OX1A)	Always	Below 1 Ω
B37-1 (HT1A) - B87-2 (HT1A)	Always	Below 1 Ω
B37-4 (E1) - B87-32 (E2)	Always	Below 1 Ω
B37-3 (OX1A) or B87-34 (OX1A) - Body ground	Always	10 kΩ or higher
B37-1 (HT1A) or B87-2 (HT1A) - Body ground	Always	10 kΩ or higher

OK

REPLACE HEATED OXYGEN SENSOR Click here

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

SFI SYSTEM, Diagnostic DTC:P0130, P0134