The PCM monitors front O2 sensor pumping current circuit(VIP) and sets DTC P2237 if front O2 sensor signal stuck is detected.
Item | Detecting Condition | Possible Cause |
DTC Strategy |
•
Electrical Monitoring | 1. Poor Connector Connection 2. Open in Upstream O2 Sensor Control Circuit 3. Defected Upstream O2 Sensor |
Enable Conditions |
•
Sensor Pump Current Valid
•
Battery voltage higher than 11V and lower than 16V | |
Threshold Value |
•
Sensor signal stuck at lambda = 1 or upstream O2 sensor voltage during fuel cut off lower than 2.1V | |
Diagnostic Time |
•
15 sec. | |
Mil On Condition |
•
2 Driving Cycle |
