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 DIAGNOSISENGINE PERFORMANCETESTING & DIAGNOSISENGINE CONTROL SYSTEM DIAGNOSIS (2 OF 3)DTC P0272: CYLINDER 4 INJECTOR CIRCUIT BALANCE (LOAD DROP IS DETECTED)W/HARNESS INSPECTIONCONTROL CIRCUIT INSPECTION

2017 Kia Rio EX, 4D Hatchback

Control Circuit Inspection

2017 Kia Rio EX, 4D HatchbackSECTION Control Circuit Inspection

■ Check Short in Control Circuit

IG KEY "OFF".
Disconnect injector connector and ECM connector.
Measure the resistance between LOW SIDE, HIGH SIDE terminal of injector harness connector.
Specification: Infinite

Fig 1: Measuring Resistance Between Low Side/High Side Terminal Of Injector Harness Connector
Courtesy of KIA MOTORS AMERICA, INC.
Is the measured resistance within specification?
YES
- Go to "COMPONENT INSPECTION " procedure.
NO
- 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.