P2237: O2 Sensor Pumping Current Circuit/Open (Bank 1 Sensor 1): DTC Detecting Condition

DTC DETECTING CONDITION CHART

Item	Detecting Condition	Possible Cause
DTC Strategy	Open circuit check of front HO2S circuit	Contact resistance in connectors Open or Short to ground in HO2S circuit Front HO2S
Enable Conditions	No relevant failure
Threshold Value	0.994 < Lambda < 1.006 and (0.122V > Downstream O2 Sensor voltage or Downstream O2 Sensor voltage > 0.75V)
Diagnostic Time	Below 1300 sec.
Mil On Condition	2 Driving Cycles