Troubleshooting

DTC P0130 HEATED OXYGEN SENSOR CIRCUIT MALFUNCTION (BANK 1 SENSOR 1)

CIRCUIT DESCRIPTION

DTC Detecting Condition:

To obtain a high purification rate of the CO, HG and NOx components of the exhaust gas, a three-way catalytic converter is used. For the most efficient use of the three-way catalytic converter, the air-fuel ratio must be precisely controlled so that it is always close to the stoichiometric air-fuel ratio.

The oxygen sensor has the characteristic that it provides output voltage* being approximately proportional to the existing air-fuel ratio. The oxygen sensor output voltage* is used to provide feedback for the ECM to control the air-fuel ratio.

By the oxygen sensor output, the ECM can determine the deviation amount from the stoichiometric air-fuel ratio and control the proper injection time immediately. If the oxygen sensor is out of order, ECM is unable to perform the accurate air-fuel ratio control.

The oxygen sensor is equipped with 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), the current flows to the heater to heat the sensor for the accurate oxygen concentration detection.

*: The voltage value changes at the inside of the ECM only.

HINT:
- Bank 1 refers to bank that includes cylinder No.1.
- Sensor 1 refers to the sensor closer to the engine body.
- The oxygen sensor's output voltage and the short-term fuel trim value can be read using the hand-held tester or OBD II scan tool.

Wiring Diagram:

CONFIRMATION DRIVING PATTERN

1. Connect the hand-held tester or OBD II scan tool to the DLC3.
2. Switch the hand-held tester or OBD II scan tool from the normal mode to the check (test) mode. (*1)
3. Start the engine and let the engine idle for 60 seconds or more. (*2)
4. Drive the vehicle at 40 km/h (24 mph) or more for 40 seconds or more. (*3)
5. Let the engine idle for 10 seconds or more. (*4)
6. Perform steps (*3) to (*4) 11 times. (*5)

HINT: If a malfunction exists, the MIL will light up on the multi information display during step (*5).

NOTE: If the conditions in this test are not strictly followed, detection of the malfunction will not be possible.

If you do not have a hand-held tester, turn the ignition switch OFF after performing steps from (*2) to (*5), then perform steps from (*2) to (*5) again.

Step 1:

Step 2 - 3:

Step 4 - 9:

Step 10 - 11:

INSPECTION PROCEDURE

HINT: Read freeze frame data using the hand-held tester or OBD II scan tool, as freeze frame data records the engine conditions when the malfunction is detected. When troubleshooting, it is useful for determining whether the vehicle was running or stopped, the engine was warmed up or not, the air-fuel ratio was lean or rich, etc. at the time of the malfunction.

CHECK FOR INTERMITTENT PROBLEMS

Hand-held tester only:
By putting the vehicle's ECM in the check mode, 1 trip detection logic is possible instead of 2 trip detection logic and the sensitivity to detect open circuits is increased. This makes it easier to detect intermittent problems.

1. Clear the DTC.
2. Set the check mode.
3. Perform a simulation test.
4. Check the connector and terminal.
5. Handle the connector.