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 MANUALSHYUNDAI2005SANTA FE GLS, 2.7 D, AWDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT VARIANT/TRIMSECTION 4 (ENGINE CONTROL SYSTEM DIAGNOSIS (3.5L) (1 OF 2))DTC TROUBLESHOOTING PROCEDURESDTC P0037: HO2S HEATER CIRCUIT LOW (BANK 1/SENSOR 2)CONTROL CIRCUIT INSPECTION
2005 Hyundai Santa Fe GLS, 2.7 D, AWD
Control Circuit Inspection
2005 Hyundai Santa Fe GLS, 2.7 D, AWDSECTION Control Circuit Inspection
WARNING: This page is about a different variant/trim than selected.
- Check for short to ground in harness
- Ignition "OFF"
- Disconnect HO2 sensor connector.
- Measure resistance between terminal 4 of HO2 sensor harness connector and chassis ground.
Specification : Approx. below 1Ω
- Is the measured resistance within specification?
YES
- Go to "COMPONENT INSPECTION " procedure.
NO
- Check for short to ground in harness.
- Repair or replace as necessary. 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.