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 MANUALSHYUNDAI2009ENTOURAGE LIMITEDREPAIR AND DIAGNOSISENGINE PERFORMANCESYSTEMDTC TROUBLESHOOTING PROCEDURES (1 OF 2)DTC P0037 HO2S HEATER CIRCUIT LOW (BANK 1/SENSOR 2)CONTROL CIRCUIT INSPECTION
2009 Hyundai Entourage Limited
Control Circuit Inspection
2009 Hyundai Entourage LimitedSECTION Control Circuit Inspection
- Check short to ground in harness.
- IG "OFF" and disconnect HO2S (B1/S2) connector.
- Measure resistance between terminal 2 of HO2S (B1/S2) harness connector and chassis ground.
Specification: Infinite
- Is the measured resistance within specification?
YES
- Go to HO2S (B1/S2) " 2Check Open in harness" as follows.
NO
- Repair short to ground in HO2S (B1/S2) heater control circuit and go to "VERIFICATION OF VEHICLE REPAIR " procedure.
- Check open in harness
- IG "OFF" and disconnect HO2S (B1/S2) and PCM connector.
- Measure resistance between terminal 2 of HO2S (B1/S2) harness connector and terminal 74 of PCM harness connector.
Specification: Approx. below 1Ω
- Is the measured resistance within specification?
YES
- Go to HO2S (B1/S2) "COMPONENT INSPECTION " procedure.
NO
- Repair open in HO2S (B1/S2) 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.