DTC P2251 Ho2S Reference Ground Circuit/Open (Bank 1/Sensor 1): DTC Detecting Condition

DTC DETECTING CONDITION CHART

Item	Detecting Condition	Detecting Condition
DTC Strategy	Electrical Check - Check symptoms related to Lambda sensor open circuit	Poor connection or damaged harness Open in HO2S control circuit Front HO2S
Enable Conditions	No Pump current malfunction
Threshold Value	Reference ground open circuit (VRc)
Diagnostic Time	1300 sec.
MIL On Condition	2 Driving Cycles