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What is code P0171? - 2002 Kia Sportage

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P0171

A lean fuel condition can be caused by:

* Low fuel pressure due to a weak pump or leaky fuel pressure regulator. (use a fuel pressure gauge to check fuel pressure at idle)

* Dirty fuel injectors. (try cleaning the injectors)

* Vacuum leaks at the intake manifold, vacuum hose connections or throttle body. (Use a vacuum gauge to check for low intake vacuum)

* Leaky EGR valve. (Check operation of EGR valve)

* Leaky PCV Valve or hose. (Check valve and hose connections)

* Dirty or defective Mass Airflow Sensor (MAF). (Try cleaning the MAF sensor wires or filament with aerosol electronics cleaner. Do NOT use anything else to clean the sensor, and do not touch the sensor wires

Posted on Jul 14, 2010

  • vishnu sahatoo Sep 07, 2010

    I had a PO171 code, bank 1 sensor. I decided that rough erratic idle after warm up normal temperature and loss of power could not have been coming from the 02 sensor, I decided to check further and discovered that after warm up one of the coil was malfunctioning, this was happening only after driving the car till it reaches warm up temp. I replaced the coil and car runs great.

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Posted on Jan 02, 2017

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