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 MANUALSHYUNDAI2011GENESIS 3.8REPAIR AND DIAGNOSISENGINE PERFORMANCESYSTEMENGINE CONTROL SYSTEM DIAGNOSIS (G6DB/G6DA - GSL 3.3L/3.8L) (1 OF 3)DTC P0140: O2 SENSOR CIRCUIT NO ACTIVITY DETECTED (BANK 1/SENSOR 2)GROUND CIRCUIT INSPECTIONCHECK OPEN IN HARNESS
2011 Hyundai Genesis 3.8
Check open in harness
2011 Hyundai Genesis 3.8SECTION Check open in harness
- IG "ON" and disconnect HO2S (B1/S2) connector.
- Measure voltage between signal terminal 3 of HO2S (B1/S2) harness connector and chassis ground (Measurement "A").
- Measure voltage between signal and ground terminals 3 & 4 of HO2S (B1/S2) harness connector (Measurement "B").
Specification: Voltage difference between measurement "A" and "B" is below 200mV.
- Is the measured voltage within specification?
YES
- Go to "COMPONENT INSPECTION " procedure.
NO
- Repair contact resistance or open in harness and 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.