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 MANUALSKIA2015RIO SX, 4D HATCHBACKREPAIR AND DIAGNOSISENGINE PERFORMANCETESTING & DIAGNOSISENGINE CONTROL SYSTEM DIAGNOSIS (1 OF 2)DTC P0078: EXHAUST VALVE CONTROL SOLENOID CIRCUIT (BANK 1)INSPECTION REPAIRW/HARNESS INSPECTIONPOWER CIRCUIT INSPECTION
2015 Kia Rio SX, 4D Hatchback
Power Circuit Inspection
2015 Kia Rio SX, 4D HatchbackSECTION Power Circuit Inspection
- Check Voltage
- IG "OFF" & Disconnect HO2S (S2) connector.
- IG "ON".
- Measure voltage between power terminal of the OCV harness connector and chassis ground.
Specification: B+
- Is the measured voltage within specification?
YES
Go to "CONTROL CIRCUIT 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.