ECM assumes that O2 sensor heater coil is abnormal and shows P0135 when the corrected resistance value of upstream O2 sensor heater is higher than the specification.
Item | Detecting Condition | Possible Cause |
DTC Strategy |
•
Signal check | 1. Poor connection 2. Open or Short to ground in power circuit 3. Open in control circuit 4. S1 |
Enable Conditions |
•
Exhaust Gas temperature > 450°C
•
Heating period > 50sec
•
Battery voltage : 10.7V ~ 16.1V | |
Threshold Value |
•
Internal resistance > Threshold value (Calculated by exhaust gas temp. or heating power) | |
Diagnostic Time |
•
60sec | |
MIL ON Condition |
•
3 driving cycle |
※ S1 : upstream oxygen sensor / S2 : downstream oxygen sensor
