Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSHYUNDAI2013GENESIS COUPE 2.0T PREMIUMREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESYSTEMENGINE CONTROL SYSTEM (DTC TROUBLESHOOTING) (1 OF 3) - 2.0LDTC P0139: O2 SENSOR CIRCUIT SLOW RESPONSE (BANK 1/SENSOR 2)COMPONENT INSPECTION
2013 Hyundai Genesis Coupe 2.0T Premium
Component Inspection
2013 Hyundai Genesis Coupe 2.0T PremiumSECTION Component Inspection
- Visually/physically inspect the following conditions:
- Ensure that the sensor is securely installed
- Check for corrosion on terminals
- Check for damaged wiring
- Repair as necessary and go to next step
- Warm up the engine to normal operating temperature and let it idle.
- Connect GDS and monitor the O2 SNSR VOL.-B1/S2 parameter on the Scantool data list.
Specification: Above 0.6V at idle
- Is sensor data near the specified value?
YES
- Check for poor connection between ECM and component: backed out terminal, improper mating, broken locks or poor terminal to wire connection. Repair as necessary and go to "VERIFICATION OF VEHICLE REPAIR " procedure
NO
- Check HO2S for contamination, deterioration, or damage. Substitute with a known-good HO2S and check for proper operation. If the problem is corrected, replace HO2S and then go to "VERIFICATION OF VEHICLE REPAIR " procedure
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.