Safety Warning

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HOMESERVICE MANUALSHYUNDAI2013GENESIS COUPE 2.0T PREMIUMREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 39 (ENGINE CONTROL SYSTEM (DTC TROUBLESHOOTING) (1 OF 4) - 3.8L)DTC P0051: HO2S HEATER CONTROL CIRCUIT LOW (BANK 2/SENSOR 1)CONTROL CIRCUIT INSPECTION

2013 Hyundai Genesis Coupe 2.0T Premium

Control Circuit Inspection

2013 Hyundai Genesis Coupe 2.0T PremiumSECTION Control Circuit Inspection

WARNING: This page is about a different car, the 2012 Hyundai Genesis Coupe. However, it is still accessible from the selected car via links, so may be relevant.

Check short to ground
1. Ignition "OFF" and Disconnect HO2S (B2/S1) connector.
2. Measure resistance between control terminal of HO2S (B2/S1) heater harness connector and chassis ground.
  Specification: Infinite
  
  Fig 1: Measuring Resistance Between Control Terminal Of HO2S (B2/S1) Heater Harness Connector & Chassis Ground
  Courtesy of HYUNDAI MOTOR CO.
3. Is the measured resistance within specification?
  YES
  - Go to "Check Open In Harness " procedure.
  NO
  - Repair short to ground in HO2S (B2/S1) heater control circuit and go to "VERIFICATION OF VEHICLE REPAIR " procedure.
Check open in harness
1. Ignition "OFF" and disconnect HO2S (B2/S1) and ECM connector.
2. Measure resistance between control terminal of HO2S (B2/S1) heater harness connector and heater control terminal of ECM harness connector.
  Specification: Approx. below 1Ω
  
  Fig 2: Measuring Resistance Between Control Terminal Of HO2S (B2/S1) Heater Harness Connector & Heater Control Terminal Of ECM Harness Connector
  Courtesy of HYUNDAI MOTOR CO.
3. Is the measured resistance within specification?
  YES
  - Go to "COMPONENT INSPECTION " procedure.
  NO
  - Repair open in HO2S (B2/S1) heater control circuit 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.