Mike's Workshop Manuals
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Kia
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2012
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Forte LX, Automatic Trans
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Repair and Diagnosis
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Engine Performance
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System
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Engine Control System Diagnosis (1 Of 3) - Except SULEV
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DTC P0139: O2 Sensor Circuit Slow Response (Bank 1 Sensor 2)
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Inspection/Repair
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Exhaust System Inspection
Exhaust System Inspection
Check the exhaust system for an exhaust leak near the engine.
Was an exhaust leak found?
YES
Repair as necessary and go to
VERIFICATION OF VEHICLE REPAIR
procedure
NO
Go to next step as below