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 MANUALSKIA2015SOUL BASE, AUTOMATIC TRANSREPAIR AND DIAGNOSISENGINE PERFORMANCESYSTEMENGINE CONTROL SYSTEM DIAGNOSIS (1 OF 2) - 1.6LDTC P0133: O2 SENSOR CIRCUIT SLOW RESPONSE (BANK 1/SENSOR 1)COMPONENT INSPECTION

2015 Kia Soul Base, Automatic Trans

Component Inspection

2015 Kia Soul Base, Automatic TransSECTION Component Inspection

Visual Check HO2S (S1)
1. IG "OFF" and disconnect HO2S (S1) connector.
2. Check that HO2S (S1) is contaminated or damaged by foreign materials.
Check HO2S (S1) performance
1. Warm up the engine to normal operating temperature.
2. Connect VMI to GDS and select "Oscilloscope".
3. Connect Channel A positive probe to Pin No. 6 (Pumping Current) and Channel A negative probe to Pin No. 4 (Trim Resistor).
4. Connect Channel B positive probe to Pin No. 1 (Nernst Voltage) and Channel B negative probe to Pin No. 3 (Virtual Ground).
  
  Fig 1: O2 Sensor Waveforms - 2000 RPM & Fuel Cut
  Courtesy of KIA MOTORS AMERICA, INC.
  1. Approx. 2000rpm
    CH.1 - Pumping Current & Virtual Ground: - 0.5 ~ 0.4 V
    
    CH.2 - Nernst Voltage & Trim Resistor: -1.0 ~ -0.0 V
  2. Fuel Cut
    CH.1 - Pumping Current & Virtual Ground: Approx. 0.89V
    
    CH.2 - Nernst Voltage & Trim Resistor: Approx. 0.64V
Confirm Part Inspection
1. Does the HO2S (S1) operate properly? (Check variation)
  YES
  - Go to "VERIFICATION OF VEHICLE REPAIR " procedure.
  NO
  - Carefully re-do this troubleshooting guide steps.
  - If problem still occurs, replace HO2S (S1) 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.