System Inspection

Engine

Engine Control - P0139 O2 Sensor Circuit Slow Response (Bank 1 / Sensor 2) - 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 ECM)
-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?