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.

SYS.OK|MANUAL.DB● LIVE

HOMESERVICE MANUALSHYUNDAI2009ENTOURAGE LIMITEDREPAIR AND DIAGNOSISENGINE PERFORMANCESYSTEMDTC TROUBLESHOOTING PROCEDURES (1 OF 2)DTC P0057 HO2S HEATER CIRCUIT LOW (BANK 2/SENSOR 2)DTC DETECTING CONDITION

2009 Hyundai Entourage Limited

DTC P0057 Ho2S Heater Circuit Low (Bank 2/Sensor 2): DTC Detecting Condition

2009 Hyundai Entourage LimitedSECTION DTC Detecting Condition

DTC DETECTING CONDITION CHART

Item	Detecting Condition	Possible cause
DTC Strategy	Detects a short to ground or open	Poor Connection Open in Power Circuit Open or short to ground in control circuit HO2S (B2/S2) PCM
Enable Conditions	No disabling Faults Present Engine Running 11V ≤ Ignition Voltage ≤ 16V
Threshold value	Short to ground or open circuit
Diagnosis Time	Continuous (More than 5 seconds failure for every 10 seconds test)
MIL On Condition	2 Driving Cycles

RENDER: 1.0x

NO RELATED

Recommended Tools & Savings

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Affiliate disclosure: We may earn a commission at no extra cost to you.

Shop Manual-Ready Tools Free Quote Check Quote Shield Pro

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.