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 MANUALSKIA2015OPTIMA SX TURBOREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT VARIANT/TRIMSECTION 107 (ENGINE CONTROL SYSTEM DIAGNOSIS (2 OF 3) - 2.4L (EXCEPT HEV))DTC P0420: CATALYST SYSTEM EFFICIENCY BELOW THRESHOLD (BANK 1)SPECIFICATIONSIGNAL WAVEFORM & DATASCAN TOOL DISPLAY FOR HO2S
2015 Kia Optima SX Turbo
Scan Tool Display for HO2S
2015 Kia Optima SX TurboSECTION Scan Tool Display for HO2S
WARNING: This page is about a different variant/trim than selected.
SCAN TOOL DISPLAY FOR HO2S
| Test Condition | Scan Tool Parameter | ||
|---|---|---|---|
| O2 SNSR VOL.-B1/S1 | O2 SNSR VOL.-B1/S2 | ||
| Normal Value when circuit is normal | Idle after warm up | Signal is switching from rich (above 0.45V) to lean (below 0.45V) a minimum of 3 times in 10 seconds. | above 0.7V |
| HO2S (B1S1) signal circuit open | Approx. 0.43 ~ 0.45V | - | |
| HO2S (B1S2) signal circuit open | - | Approx. 0.43 ~ 0.45V | |
(Fig.1) Normal waveform of Heated Oxygen Sensor (HO2S) - B1/S1 (upstream)
- CH A1 (Nernst cell), CH A2 (Pumping cell), CH B1 (Virtual ground), CH B2 (Compensative Resistance)
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.