klauswolf1
Veloster Oxygen Sensor Issue
Summary of the thread
A 2022 Hyundai Veloster experienced a check engine light due to an oxygen sensor error, accompanied by increased fuel consumption. The issue was traced to a defective cable and plug connection, with the sensor itself also potentially failing. After a mechanic confirmed the sensor's degradation and a small crack in the cable, replacing the sensor resolved the problem, turning off the check engine light and normalizing fuel consumption.
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4 comment(s)
klauswolf1 (community.author)
I haven't noticed rough idling or hesitation, but could the defective cable or plug connection alone be the problem, or is the sensor itself failing, given the error code and increased fuel consumption?
theokoch44
While a faulty connection can cause issues, the sensor's lifespan is finite. Given the mileage, the O2 sensor itself is a likely culprit. I'd suggest a workshop confirms the diagnosis before replacing parts.
klauswolf1 (community.author)
The mechanic confirmed the O2 sensor needed replacing due to degradation, and the cable had a small crack. The total repair cost was 95€, including parts and labor. Now the check engine light is off, and the fuel consumption seems normal again. Thanks for your help!
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HYUNDAI
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VELOSTER
theokoch44
Aged O2 sensors can trigger a check engine light and impact fuel economy. The exhaust system relies on accurate readings from these sensors. Have you noticed any changes in engine performance, like rough idling or hesitation during acceleration?