DTC P0056 Ho2S Heater Control Circuit (Bank 2/Sensor 2): DTC Detecting Condition
DTC DETECTING CONDITION CHART
| Item |
Detecting condition |
Possible Cause |
| DTC Strategy |
- Evaluate O2 sensor element temperature via measuring element resistance
|
- Related fuse blown or missing
- Heater control circuit open or short
- Power supply circuit open or short
- Contact resistance in connectors
- Faulty HO2S
|
| Enable Conditions |
- Sensor preheating and full heating phases finished
- Time after start elapsed:180 sec.
- 11V < Battery voltage < 16V
- 1 % < Heater power < 99%
- Exhaust gas temp.model<710°C (1,310°F)
|
| Threshold Value |
- O2 sensor element resistance > 3000Ω [Element Temperature < 450°C (842°F)]
|
| Diagnostic Time |
|
| Fail Safe |
|