- Disconnect the HO2 sensor lead wire coupler. (5-79)
- Inspect the HO2 sensor and its circuit referring to flow table of the malfunction code C44 or 64 (P0156/P0161 or P0130/P0135).
- Check the resistance between the terminals of the HO2 sensor.
- Resistance: 4.0 - 5.5 Ω at 23°C (73.4°F) (White - White)
- 09900-25008: Multi-circuit tester set
- Tester knob indication: Resistance (Ω)
If the resistance is not within the standard range, replace the HO2 sensor with a new one.
Note:
- Temperature of the sensor affects resistance value largely.
- Make sure that the sensor heater is at correct temperature.
Warning: Do not remove the HO2 sensor while it is hot.
Caution: Be careful not to expose it to excessive shock. Do not use an impact wrench while removing or installing the HO2 sensor unit. Be careful not to twist or damage the sensor lead wire.
- Installation is in the reverse order of removal.
Caution: Do not apply oil or other materials to the sensor air hole.
- Tighten the sensor unit to the specified torque.
- HO2 sensor: 48 Nm (4.8 kgf·m, 34.5 lb-ft)
