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 P0140: O2 SENSOR CIRCUIT NO ACTIVITY DETECTED (BANK 1/SENSOR 2)TERMINAL AND CONNECTOR INSPECTION
2013 Hyundai Genesis Coupe 2.0T Premium
Terminal and Connector Inspection
2013 Hyundai Genesis Coupe 2.0T PremiumSECTION Terminal and Connector Inspection
- Ignition "ON" & Engine "OFF"
- Monitor the O2 SNSR VOL.-B1/S2 parameter on the Scantool data list while wiggling the wiring harness and related connectors. Refer to "SIGNAL WAVEFORM & DATA ".
- The value should remain more or less unchanged. If not, check for the following conditions:
- 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 the 15A sensor2 fuse
- Check front and rear HO2S for connections being reversed.
- Was a problem found in any of the above areas?
YES
- Repair as necessary and go to "VERIFICATION OF VEHICLE REPAIR " procedure
NO
- Go to the next Inspection 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.