P0175

DTC P0174 / P0175: System Too Lean / Too Rich (Sensor-1, Bank-2)

System And Wiring Diagram:

System And Wiring Diagram

A/F Sensor Description
Refer to A/F Sensor Description

DTC Detecting Condition And Trouble Area:

DTC Detecting Condition and Trouble Area

DTC Confirmation Procedure

WARNING:
- When performing a road test, select a place where there is no traffic or possibility of a traffic accident and be very careful during testing to avoid occurrence of an accident.
- Road test should be carried out with 2 persons, a driver and a tester, on a level road.

NOTE:
Check to make sure that the following conditions are satisfied when using this "DTC Confirmation Procedure".
- Intake air temperature: -10 °C (14 °F) to 80 °C (176 °F).
- Engine coolant temperature: 30 °C (86 °F) or more.
- Altitude (barometric pressure): 2400 m, 8000 ft or less (560 mmHg, 75 kPa or more).
- The following DTC is not detected: ECT sensor, CKP sensor, IAT sensor, MAP sensor, A/F sensor, A/F sensor heater, EVAP leak check pressure sensor, TP sensor, barometric pressure sensor, MAF sensor, EGR system and CMP sensor.

1. With ignition switch OFF, connect scan tool.
2. Turn ON ignition switch and clear DTC using scan tool.
3. Start engine and warm up to normal operating temperature.
4. Drive vehicle at 40 mph (60 km/h) or higher. (engine speed: 2500 - 3000 r/min.)
5. Keep above vehicle speed for 4 min. or more. (Throttle valve opening is kept constant in this step.)
6. Check if DTC and pending DTC exist by using scan tool. If not, check if oxygen sensor monitoring test has been completed by using scan tool. If not in both of above checks (i.e., no DTC and pending DTC and oxygen sensor monitoring test not completed), check vehicle condition (environmental) and repeat Step 3) through 6).

Step 1-6 (Continued):

Step 6 (Continued)-7:

DTC Troubleshooting

NOTE: Before this trouble shooting is performed, read the precautions for DTC troubleshooting referring to Precautions for DTC Troubleshooting.