Question about Hyundai Accent

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I have a Hyundai Accent and it has the following fault dignoses: "Slow response from No 1 Lambda Probe" the engine management light was on but not its gone out. Whats the problem?

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  • saoralba Jul 17, 2008

    I also think the exhaust is busted at the front, could this be the cause for the light?

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  • 24 Answers

Sounds like an oxygen sensor malfunctioning

Posted on Jul 17, 2008

  • Don Scurti Jul 17, 2008

    Sure that would definitely cause the sensor to read differently.

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I don't have a lot of experience diagnosing such faults. I think live data would be more useful than just fault codes which tend to send the inexperienced down false trails.

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I suggest you check the precise function of the light that illuminates as some vehicles have more than one light for check engine and emission purposes.

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Location of the probe in a system
The probe is typically screwed into a tapped hole in the exhaust, located after the branch manifold of the exhaust system combines, and before the catalytic converter. New vehicles are required to have a sensor before and after the exhaust catalyst to meet U.S. regulations requiring that all emissions components be monitored for failure. Pre and post-catalyst signals are monitored to determine catalyst efficiency. Additionally, some catalyst systems require brief cycles of lean (oxygen-containing) gas to load the catalyst and promote additional oxidation reduction of undesirable exhaust components.
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It's a good article about the two-sensor system and oxygen sensors in general and is available here:

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