P0152
3UZ-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0130: Oxygen Sensor Circuit Malfunction (Bank 1 Sensor 1)
DTC P0130 - Oxygen Sensor Circuit Malfunction (Bank 1 Sensor 1)
DTC P0132 - Oxygen Sensor Circuit High Voltage Bank1 Sensor1
DTC P0150 - Oxygen Sensor Circuit Malfunction (Bank 2 Sensor 1)
DTC P0152 - Oxygen Sensor Circuit High Voltage Bank2 Sensor1
DTC P2195 - Oxygen Sensor Signal Stuck Lean (Bank 1 Sensor 1)
DTC P2196 - Oxygen Sensor Signal Stuck Rich (Bank 1 Sensor 1)
DTC P2197 - Oxygen Sensor Signal Stuck Lean (Bank 2 Sensor 1)
DTC P2198 - Oxygen Sensor Signal Stuck Rich (Bank 2 Sensor 1)
DESCRIPTION
The heated oxygen sensor is used to monitor oxygen concentration in the exhaust gas. For optimum catalytic converter operation, the air-fuel mixture must be maintained near the ideal stoichiometric air-fuel ratio. The heated oxygen sensor output voltage changes suddenly in the vicinity of the stoichiometric air-fuel ratio. The ECM adjusts the fuel injection time so that the air-fuel ratio is nearly stoichiometric. The heated oxygen sensor generates a voltage between 0.1 and 0.9 V in response to oxygen concentration in the exhaust gas.
If the oxygen concentration in the exhaust gas increases, the air-fuel ratio is called lean. The heated oxygen sensor voltage drops below 0.45 V, which informs the ECM of the lean condition.
If oxygen is not in the exhaust gas, the air-fuel ratio is called rich. The heated oxygen sensor voltage increases above 0.45 V, which informs the ECM of the rich condition.
HINT: The ECM provides a pulse width modulated control circuit to adjust current through the heater. The heated oxygen sensor heater circuit uses a relay on the +B side of the circuit.
MONITOR DESCRIPTION
The ECM uses the heated oxygen sensor information to regulate the air-fuel ratio close to a stoichiometric air-fuel ratio. This maximizes the catalytic converter's ability to purify the exhaust gases. The heated oxygen sensor detects oxygen levels in the exhaust gas and sends this signal to the ECM.
The inner surface of the sensor element is exposed to outside air. The outer surface of the sensor element is exposed to the exhaust gas. The sensor element is made of platinum coated zirconia and an integrated heating element. The heated oxygen sensor's output voltage changes suddenly in the vicinity of the stoichiometric air-fuel ratio. The heated oxygen sensor generates output voltage between 0.1 V and 0.9 V in response to the oxygen concentration in the exhaust gas. When the front heated oxygen sensor voltage is 0.45 V or more, the ECM judges that the air-fuel ratio is rich. When it is 0.45 V or less, the ECM judges that the air-fuel ratio is lean.
- The heated oxygen sensor should indicate rich and lean alternately at a regular cycle under the air-fuel ratio feedback control. If the heated oxygen sensor voltage remains at rich or lean for about 20 seconds (x 3 times), the ECM interprets this as a malfunction of the heated oxygen sensor, illuminates the MIL (2 trip detection logic) and sets DTC P0130, 0150, 2195, 2197, 2196 or 2198.
- If the front heated oxygen sensor output voltage exceeds 1.2 V for 10 seconds, the ECM illuminates the MIL (2 trip detection logic) and sets DTC P0132 or 0152.
MONITOR STRATEGY
TYPICAL ENABLING CONDITIONS
P0130, P0150, P2195, P2196, P2197 and P2198:
P0132 and P0152:
TYPICAL MALFUNCTION THRESHOLDS
Heated oxygen sensor voltage (P0130 and P0150):
Heated oxygen sensor out of range (P0132 and P0152):
Heated oxygen sensor voltage stuck Lean (P2195 and P2197):
Heated oxygen sensor voltage stuck rich (P2196 and P2198):
COMPONENT OPERATING RANGE
MONITOR RESULT
Refer to CHECKING MONITOR STATUS Mode 6 Data.
WIRING DIAGRAM
CONFIRMATION DRIVING PATTERN
- (a) Connect the Techstream to the DLC3.
- (b) Switch the tester from normal mode to check mode Check Mode Procedure.
- (c) Allow the engine to idle until the ECT reaches 75°C (167°F).
- (d) Allow the vehicle to run at 40 km/h (25 mph) or more for 25 seconds or more.
- (e) Allow the engine to idle for 30 seconds or more.
- (f) Perform steps (d) and (e) at least 3 times.
HINT: If a malfunction exists, the MIL will be illuminated.
- (g) Allow the engine to idle for 30 seconds.
NOTE:
If the conditions in this test are not strictly followed, you should perform steps (d) and (e).
If you do not have the Techstream, turn the ignition switch OFF after performing steps (c) and (f), and then perform steps (c) and (f) again.
INSPECTION PROCEDURE
HINT: It is possible that the malfunctioning area can be found using the Active Test Control the Injection Volume to A/F Sensor operation. 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 +25% (increase) by the Active Test.
The Active Test procedure enables a technician to check and graph the output voltages of the heated oxygen sensors.
- Procedure:
1 Connect the Techstream to the DLC3.
2 Turn the ignition switch ON.
3 Warm up the engine by running the engine at 2,500 rpm for approximately 90 seconds.
4 Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the Injection Volume for A/F Sensor.
5 Perform the Active Test while the engine is idling.
Standard:
The heated oxygen sensor reacts in accordance with the increase and decrease of injection volume:
+25% -> Rich output: More than 0.55 V
-12.5% -> Lean output: Less than 0.4 V
NOTE:
The heated oxygen sensor (sensor 1) output has a few seconds of delay and the heated oxygen sensor (sensor 2) output has a maximum of 20 seconds of delay.
If the vehicle is short on fuel, the air-fuel ratio becomes lean and the DTCs will be recorded.
HINT:
- Read freeze frame data using the Techstream. Freeze frame data records the engine conditions when a malfunction is detected. When troubleshooting, freeze frame data can help determine if the vehicle was running or stopped, 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.
- Bank 1 includes No. 1 cylinder, but bank 2 does not. The No. 1 cylinder is located in the front part of the engine, opposite the transmission.
- Sensor 1 refers to the sensor closest to the engine body.
- Sensor 2 refers to the sensor farthest away from the engine body.
PROCEDURE
1. CHECK OTHER DTC OUTPUT
(a) Connect the Techstream to the DLC3.
(b) Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
(c) Read the Trouble Codes.
Result:
C -- GO TO RELEVANT DTC CHART
B -- READ VALUE USING TECHSTREAM (HEATED OXYGEN SENSOR (SENSOR 1) VOLTAGE)
A -- Continue to next step.
2. READ VALUE USING TECHSTREAM (HEATED OXYGEN SENSOR (SENSOR 1) VOLTAGE)
(a) Connect the Techstream to the DLC3.
(b) Enter the following menus: Powertrain / Engine and ECT / Data List / O2S B1 S1 or O2S B2 S1.
(c) Allow the engine to run for 90 seconds at 2,500 rpm.
(d) Read the heated oxygen sensor voltage while the engine is idling.
OK:
The heated oxygen sensor voltage alternates between below 0.4 V and more than 0.55 V (see the following table).
OK -- PERFORM CONFIRMATION DRIVING PATTERN
NG -- Continue to next step.
3. INSPECT HEATED OXYGEN SENSOR
(a) Disconnect the H9 and H10 sensor connectors.
(b) Measure the resistance of the sensor.
Standard resistance:
NG -- REPLACE HEATED OXYGEN SENSOR
OK -- Continue to next step.
4. INSPECT EFI RELAY (Marking: EFI)
(a) Remove the EFI relay from the engine room No. 2 relay block.
(b) Measure the resistance of the EFI relay.
Standard resistance:
NG -- REPLACE EFI RELAY
OK -- Continue to next step.
5. CHECK WIRE HARNESS (HEATED OXYGEN SENSOR (SENSOR 1) - ECM)
(a) Disconnect the H9 and H10 sensor connectors.
(b) Disconnect the E2 and E4 ECM connectors.
(c) Measure the resistance of the wire harness side connectors.
Standard resistance:
NG -- REPAIR OR REPLACE HARNESS AND CONNECTOR
OK -- Continue to next step.
6. CHECK AIR INDUCTION SYSTEM
(a) Check the air induction system for vacuum leaks.
OK:
There are no vacuum leaks in air induction system.
NG -- REPAIR OR REPLACE AIR INDUCTION SYSTEM
OK -- Continue to next step.
7. CHECK FUEL PRESSURE
(a) Check the fuel pressure Testing and Inspection.
NG -- REPAIR OR REPLACE FUEL SYSTEM
OK -- Continue to next step.
8. INSPECT FUEL INJECTOR
(a) Check the injector injection (whether fuel volume is high or low, and whether injection pattern is poor).
NG -- REPLACE FUEL INJECTOR
OK -- REPLACE HEATED OXYGEN SENSOR
9. PERFORM CONFIRMATION DRIVING PATTERN
HINT: Clear all DTCs before performing the confirmation driving pattern.
NEXT -- Continue to next step.
10. READ OUTPUT DTC
(a) Clear the DTC DTC Check / Clear.
(b) Start the engine and allow the engine to idle for 15 seconds or more.
(c) Read the DTC.
Result:
B -- CHECK FOR INTERMITTENT PROBLEMS
A -- REPLACE HEATED OXYGEN SENSOR
11. READ VALUE USING TECHSTREAM (HEATED OXYGEN SENSOR (SENSOR 1) VOLTAGE)
(a) Connect the Techstream to the DLC3.
(b) Enter the following menus: Powertrain / Engine and ECT / Data List / O2S B1 S1 or O2S B2 S1.
(c) Allow the engine to run at 2,500 rpm for 3 minutes.
(d) Depress the accelerator pedal quickly until the engine rpm reaches 4,000 rpm 3 times.
Result:
B -- READ DTC OUTPUT (DTC P0132 OR P0152 IS OUTPUT AGAIN)
A -- Continue to next step.
12. CHECK HARNESS AND CONNECTOR (CHECK FOR SHORT)
(a) Disconnect the H9 and H10 sensor connectors.
(b) Disconnect the E2 and E4 ECM connectors.
(c) Measure the resistance of the wire harness side connector.
Standard resistance:
OK -- REPLACE ECM
NG -- Continue to next step.
13. INSPECT HEATED OXYGEN SENSOR
(a) Disconnect the H9 and H10 sensor connectors.
(b) Measure the resistance of the sensor.
Standard resistance:
NG -- REPLACE OXYGEN SENSOR
OK -- REPAIR OR REPLACE HARNESS OR CONNECTOR
14. READ DTC OUTPUT (DTC P0132 OR P0152 IS OUTPUT AGAIN)
(a) Clear the DTC DTC Check / Clear.
(b) Start the engine and allow the engine to idle for 15 seconds or more.
(c) Read the DTC.
Result:
B -- CHECK INTERMITTENT PROBLEMS
A -- REPLACE OXYGEN SENSOR