P1166 – KIA

Code : P1166
Make : KIA
Description : P1166 KIA O2 Sensor System Lambda Controller at the Limit Bank 1
Possible causes :
– Air leakage or restriction in intake or exhaust system
– Dirty engine oil or oil level too high
– Front HO2S or MAFS contamination
– Fuel system
– EVAP system
– Faulty sensor signals
Solutions :
– Carry out a Reset via CarDiag
– Choose a better quality fuel
– Check that the tank cap is securely closed
– Check the oil level and add more if it is lower than MAX
– Restart an Automatic diagnostic via CarDiag
– If the fault persists, you can check the “Possible causes” listed above : visually inspect (by yourself (tutorials to come) or by a professional) the wiring harness and the associated connectors, check for damaged components, and look for broken, bent, pushed, or corroded connector pins.

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