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 MANUALSHYUNDAI2009SONATA SE, 3.3 FREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCETESTING & DIAGNOSISDTC TROUBLESHOOTING PROCEDURES - 3.3L (1 OF 2)DTC P0116: ENGINE COOLANT TEMPERATURE CIRCUIT RANGE/PERFORMANCEDTC DETECTING CONDITION

2009 Hyundai Sonata SE, 3.3 F

DTC P0116: Engine Coolant Temperature Circuit Range/Performance: DTC Detecting Condition

2009 Hyundai Sonata SE, 3.3 FSECTION DTC Detecting Condition

DTC DETECTING CONDITION CHART

Item	Detecting Condition	Possible Cause
DTC Strategy	Monitor the engine coolant temperature	ECTS
Enable Conditions	Shutdown time > 180 minutes Intake air-temperature at start-up < 40°C (104°F) No disabling faults (ECTS) Engine running > 60 seconds Minimum airflow is satisfied for a certain time.
Threshold value	When the start-up engine coolant temperature does not rise by 3°C (5.4°F).
Diagnosis Time	Immediately
MIL On Condition	2 driving cycles

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.