PCM sets DTC P0038 if the PCM detects that the rear HO2S heater control line is open or shorted to battery line.
Item | Detecting Condition | Possible Cause |
DTC Strategy |
•
Electrical Monitoring | 1. Poor connection 2. Open or Short to Battery in Control Circuit 3. Defected Downstream O2 Sensor |
Enable Conditions |
•
Downstream O2 Sensor Heater Pulse Width Modulation(PWM) higher than 3.5% and lower than 96.5%
•
Battery voltage higher than 11 V and lower than 16 V
•
No relevant DTC present | |
Threshold Value |
•
Open or Short to Battery | |
Diagnostic Time |
•
Continuous | |
Mil On Condition |
•
2 Driving Cycle |
