The ECM assumes the power circuit is open and sets DTC P2243 when the upstream O2 sensor is lower than 0.2V or higher than 4.7V and the internal resistance gets high.
Item | Detecting Condition | Possible Cause |
DTC Strategy |
•
Reference Voltage Circuit Open | 1. Poor connection 2. Open or short power/ground in signal circuit 3. S1 |
Enable Conditions |
•
Sensor voltage < 0.2 V or >4.7 V | |
Threshold Value |
•
Internal resistance > 950 Ω | |
Diagnostic Time |
•
Immediate | |
MIL ON Condition |
•
2 Driving Cycles |
※ S1 : upstream oxygen sensor / S2 : downstream oxygen sensor
