P0171 KIA - Bank 1 System Too Lean
- Faulty front heated oxygen sensor
- Ignition misfiring
- Faulty fuel injectors
- Exhaust gas leaks
- Incorrect fuel pressure
- Lack of fuel
- Faulty Mass Air Flow (MAF) sensor
- Incorrect Positive Crankcase Ventilation (PCV) hose connection
- The amount of mixture ratio compensation is too small. (The mixture ratio is too lean.)
- Excessive Fuel Consumption
With the Air/Fuel Mixture Ratio Self-Learning Control, the actual mixture ratio can be brought closely to the theoretical mixture ratio based on the mixture ratio feedback signal from the heated oxygen sensors 1. The Engine Control Module (ECM) calculates the necessary compensation to correct the offset between the actual and the theoretical ratios.
In case the amount of the compensation value is extremely large (The actual mixture ratio is too lean.), the ECM judges the condition as the fuel injection system malfunction and light up the Malfunction Indicator Light (MIL) (2 trip detection logic).
1previously had p0401 and p0172. i found a VACUMN LEAK, CORRECTED IT, ERASED THE CODE AND THE P0171...
I had a MAF sensor code, I cleaned the sensor and now after 3 miles driving I have only a P0171 e...
i have a 1998 Kia Sportage with the code P0171 the car idles fine but when i give it gas it wants to...
Har en KIA Shuma II 2002 1,6 har gått 12900 mil....
The code appear when the engine running for almost 15 miles. When the information come erased, the c...
Any information is appreciated. Thanks