P0135 is an evaluate O2 Sensor heater performance pending DTC, root causes will be confirmed by P0030, P0606, P2243, P2251.
Item | Detecting Condition | Possible Cause | |
DTC Strategy |
•
Evaluate Upstream O2 Sensor Heater performance | 1. Poor Connector Connection 2. Defected related fuse 3. Open/Short in Power Circuit 4. Open/Short in Heater Control Circuit 5. Defected Upstream O2 Sensor | |
Enable Condition | Case 1 |
•
Engine speed during engine start higher than 640 RPM to 960 RPM depending on start ECT
•
Heater Pulse Width Modulation(PWM) higher than 1.56%
•
Upstream O2 sensor pre-heating phase finished
•
Upstream O2 sensor operative readiness detected; [Upstream O2 sensor tip Temp. higher than 1,184℉(640℃) or 18 sec. elasped after dew-point exceeded]
•
18 sec. after dew-point exceeded
•
Battery voltage higher than 11 V and lower than 16 V
•
No relevant DTC present | |
Case 2 |
•
Battery voltage higher than 11 V and lower than 16 V | ||
Threshold Value | Case 1 |
•
Upstream O2 sensor tip Temp. lower than 1,391℉(755℃)
•
Upstream O2 sensor tip Temp. higher than 1,652℉(900℃) | |
Case 2 |
•
Error bit information from HW circuit | ||
Diagnostic Time |
•
O2 sensor tip Temp. less than 1,184℉(660℃) : 1 sec.
•
O2 sensor tip Temp. higher than 1,184℉(660℃) and less than 1,391℉(755℃) : 10 sec.
•
O2 sensor tip Temp. higher than 1,652℉(900℃) : 10 sec. | ||
MIL ON Condition |
•
2 Driving Cycle | ||
