LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Kia >> 2021 >> Forte GT, Standard Trans >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System Diagnosis - 1.6L (6 Of 6) >> DTC P2251-00: O2 Sensor Reference Ground Circuit/Open (Bank 1 Sensor 1) >> Component Inspection
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Component Inspection

Inspection Condition (+) Probe (-) Probe Reference
Connector Terminal Connector Terminal
  1. Engine "ON". (warm up condition)
HO2S (Bank 1, Sensor 1) connector 3 (pumping current) HO2S (Bank1, Sensor1) connector 2 (nernst voltage) Fig.1
HO2S (Bank 1, Sensor 1) connector 1 (virtual ground) HO2S (Bank1, Sensor1) connector 6 (trim resistor)
G13292684Courtesy of KIA MOTORS AMERICA, INC.

Good 

No Good