The PCM/ECM 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 check - check symptoms related to Lambda sensor open circuit | 1. Poor connection or damaged harness 2. Open in HO2S control circuit 3. Front HO2S |
Enable Conditions |
•
Wide range sensor pump current valid | |
Threshold Value |
•
Pumping current circuit open ( VIP)
•
Signal < 2.1V during fuel cut off | |
Diagnostic Time |
•
Within 15sec. after related symptom detected. | |
Mil On Condition |
•
2 Driving Cycles |
