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 PERFORMANCESYSTEMENGINE CONTROL SYSTEM DIAGNOSIS (3 OF 3)DTC P2237: O2 SENSOR PUMPING CURRENT CIRCUIT/OPEN (BANK 1 / SENSOR 1)W/HARNESS INSPECTIONCURRENT PUMP CIRCUIT INSPECTION
2017 Kia Rio EX, 4D Hatchback
Current Pump Circuit Inspection
2017 Kia Rio EX, 4D HatchbackSECTION Current Pump Circuit Inspection
■ Check Open or Short in Signal Circuit
- IG KEY "OFF".
- Disconnect HO2S (S1) connector.
- IG KEY "ON" & ENG "OFF".
- Measure the voltage between Current Pump terminal of HO2S (S1) harness connector and chassis ground.
Specification: Approx 2.8V
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.