ECM/PCM assumes the correction resistance circuit is open and shows P2626 when upstream O2 sensor is higher than 4.8V under the fuel cut condition.
Item | Detecting Condition | Possible cause |
DTC Strategy |
•
Signal check, high | 1. Poor connection or damaged harness 2. Open in HO2S control circuit 3. Front HO2S |
Enable Conditions |
•
Fuel Cut
•
Upstream O2S sensor temp. > 720℃
•
Exhaust Gas Temp. < 750℃ | |
Threshold value |
•
Sensor voltage is higher than 4.8V | |
Diagnosis Time |
•
Immediate | |
MIL On Condition |
•
2 Driving Cycle |
