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 MANUALSKIA2017RIO EX, 4D HATCHBACKREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCETESTING & DIAGNOSISENGINE CONTROL SYSTEM DIAGNOSIS (2 OF 3)DTC P0442: EVAPORATIVE EMISSION SYSTEM - LEAK DETECTED (SMALL LEAK)GENERAL INFORMATIONDTC DETECTING CONDITION

2017 Kia Rio EX, 4D Hatchback

General Information: DTC Detecting Condition

2017 Kia Rio EX, 4D HatchbackSECTION DTC Detecting Condition

Item	Detecting Condition	Possible Cause
DTC Strategy	FTP behavior during Canister	Leakage in each hose/fuel filler pipe Leakage in CCV/Canister/Fuel tank/Fuel Filler Cap
Enable Conditions	Canister Close Valve close Canister Purge Valve close Time after engine start > 600 sec IAT temp -14.36 ~ 211.64°F BARO > 68 kPa 7.2L < Fuel level < 40.8L Duration of tank ventilation ≥ 10 sec Fuel System Status Closed loop Disable conditions: P0300 ~ P0304
Threshold value	FTP gradient > 0.03 ~ 0.04 kPa/sec
Diagnosis Time	-
MIL On Condition	2 driving cycle

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.