When the ECM/PCM detects a short to ground in the heater control circuit(S2), the ECM/PCM sets DTC P0037.
Item | Detecting Condition | Possible Cause |
DTC Strategy |
•
Electrical check. | 1. Poor connection 2. Short to ground in control circuit 3. HO2S(S2) |
Enable Conditions |
•
3.5% < Downstream O2 sensor heater PWM < 96.5%
•
10V < Battery voltage < 16V | |
Threshold Value |
•
ECU power stage diagnosis | |
Diagnostic Time |
•
Continuous. | |
Mil On Condition |
•
2 driving cycles. |
