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Hyundai
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2012
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Elantra Touring GLS, Automatic Trans
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Repair and Diagnosis
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Engine Performance
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System
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DTC Troubleshooting Procedures
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Inspection Chart For Diagnostic Trouble Codes (DTC)
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P0139: O2 Sensor Circuit Slow Response (Bank 1/Sensor 2)
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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.