Component Inspection

P0139 O2 Sensor Circuit Slow Response (Bank 1 / Sensor 2)

Inspection/Repair - Component Inspection

Component Inspection

Check PCV
1. IG "OFF"
2. Disconnect PCV.
3. Check that PCV is properly operating.
4. Is the PCV O.K?





Check the PCSV
1. Ignition "OFF".
2. Disconnect PCSV and Vacuum Hose.
3. Apply vacuum on PCSV with Hand Vacuum Gauge.
4. Is the PCSV keeping the Vacuum?





Check Injector
1. Ignition "OFF"
2. Remove Injector.
3. Check Leakage and clog on Injector.
4. Measure resistance terminal 1 and 2 of Injector connector (Component side).
Specification :









5. Is the measured resistance within specifications?





Check Sensors related to Fuel Trim
1. Check the Input Voltage of Sensors related to Fuel Trim (MAPS, TPS, ECTS, PCSV, Injector, and etc)
- Refer to Trouble Shooting Guide -
2. Are the sensors related to Fuel Trim O.K?