When the ECM/PCM detects an open in the HO2S(S2) heater control circuit, the ECM/PCM sets DTC P0036.
Item | Detecting Condition | Possible Cause |
DTC Strategy |
•
Evaluate O2 sensor Element Temperature via measuring Element Resistance | 1. Poor connection 2. Open circuit 3. HO2S(S2) |
Enable Conditions |
•
Engine speed during engine start (engine operating state out of start) > 640...960rpm depending on start ECT
•
Downstream O2 sensor pre-heating phase finished
•
3.5% < Downstream O2 sensor heater PWM < 96.5%
•
ECT drop since the last engine stop > 25°C
•
Downstream O2 sensor operative readiness detectedsame as the conditions of P0136
•
11V < Battery voltage < 16V | |
Threshold Value |
•
Downstream O2 sensor internal resistance (O2 sensor heater power <20% of Nominal heater power) > 10000..18000Ω versus time after start | |
Diagnostic Time |
•
130 sec | |
Mil On Condition |
•
2 driving cycles. |
※ S1 : upstream oxygen sensor / S2 : downstream oxygen sensor
