DTC P0134 Ho2S Circuit No Activity Detected (Bank 1 / Sensor 1): DTC Detecting Condition
DTC DETECTING CONDITION CHART
| Item |
Detecting Condition |
Possible Cause |
| DTC Strategy |
Case 1 |
- Signal plausibility during fuel cut-off
|
- Poor connection or damaged harness
- HO2S contamination
|
| Case 2 |
- Signal amplitude plausibility
|
| Enable Conditions |
Case 1 |
- O2 sensor operative readiness detected
- O2 sensor pre-heating phase finished
- 12g < Integrated Mass Air Flow since Fuel Cut-Off begin < 250g
- No relevant failure
- 10V < Battery voltage < 16V
|
| Case 2 |
- O2 sensor pre-heating phase finished
- 5 < Number of lambda controller P jumps since Lambda control activation
- Closed loop lambda controller output not limited to min./max. limit
- O2 sensor signal lean half period < 2 sec.
- O2 sensor signal rich half period < 2 sec.
- No relevant failure
- 10V < Battery voltage < 16V
|
| Threshold Value |
Case 1 |
- HO2S voltage at fuel-cut mode > 0.3V
|
| Case 2 |
- Upstream O2 sensor signal amplitude < 0.20 V
|
| Diagnostic Time |
Case 1 |
|
| Case 2 |
|
| MIL On Condition |
|