The PCM sets DTC P2237 when the conditions are like below.
- The fuel factor change is higher than 0.1 when the sensor voltage is 1.49~1.5V
- Integrated air mass flow value is higher than threshold value when the sensor voltage is 1.49~1.5V
- The fuel cut is being kept when the sensor voltage is lower than 0 V
Item | Detecting Condition | Possible Cause | |
Case 1 | DTC Strategy |
•
Pumping Current Circuit | 1. Poor connection 2. Open power/ground in signal circuit 3. HO2S(S1) |
Enable Conditions |
•
Fuel system status : Closed loop
•
Fuel Factor Changes greater than 0.1 | ||
Threshold Value |
•
Sensor voltage 1.49~1.51 V | ||
Case 2 | DTC Strategy |
•
Activation Check | |
Enable Conditions |
•
Target Lambda less than 0.97 or greater than 1.03
•
Integrated Mass Flow greater than 0.3 kg | ||
Threshold Value |
•
Sensor voltage 1.49~1.51 V | ||
Case 3 | DTC Strategy |
•
Plausibility Check | |
Enable Conditions |
•
Fuel cut | ||
Threshold Value |
•
Sensor voltage less than 0 V | ||
Diagnosis Time |
•
Immediate | ||
MIL On Condition |
•
- | ||
