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Hyundai
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2013
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Elantra GT Automatic Trans
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Repair and Diagnosis
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Engine Performance
›
System
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Engine Control System Diagnosis (1 Of 2)
›
DTC P0139: O2 Sensor Circuit Slow Response (Bank 1/Sensor 2)
›
System Inspection
›
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.