System Inspection

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

Inspection/Repair - System Inspection

Exhaust System Inspection

1. Check the exhaust system for an exhaust leak near the engine.
2. Was an exhaust leak found?






Air Leakage Inspection

1. Visually/physically inspect the following items:
'- Vacuum hoses for splits, kinks and improper connections.
'- Exhaust system between HO2S and Three way catalyst for air leakage.
'- EVAP system for leakage.
'- PCV hose for proper installation.
2. Was a problem found in any of the above areas?






Visual/Physical Inspection

1. Visually/physically inspect the following items:
'- Check for corrosion on terminals.
'- Check for terminal tension (at the HO2S and at the PCM)
'- Check for damaged wiring.
'- Check the HO2S ground circuit for a good connection.
'- Check front and rear HO2S for connections being reversed.
2. Was a problem found in any of the above areas?