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P0140 O2 Sensor Circuit No Activity Detected (Bank 1/Sensor 2): DTC Detecting Condition
P0140 O2 SENSOR CIRCUIT NO ACTIVITY DETECTED (BANK 1/SENSOR 2)
| Item |
Detecting Condition |
Possible Cause |
| DTC Strategy |
case1 |
- Signal Plausibility with Rich mixture (during Catalyst Purge after Fuel Cut-off)
|
- Related fuse blown or missing
- Poor connection or damaged harness
- HO2S contamination
|
| case2 |
- Signal Plausibility with Lean mixture (during Fuel Cut-Off)
|
| Enable Conditions |
case1 |
- Integrated mass air flow in last fuel cut off > 10g
- Integrated mass air flow in part load > 250g
- Downstream HO2S sensor signal at end of last fuel cut off < 0.25V
- Minimum HO2S (S1) during Catalyst Purge phase < 0.5 V
- Catalyst temperature > 348°C (658°F)
- No relevant failure
- 11V < Battery voltage < 16V
|
| case2 |
- 20g < Integrated mass air flow since begin
- No relevant failure
- 10V < Battery voltage
- Fuel Cut Off active
- Fuel cut off phase
|
| Threshold Value |
case1 |
|
| case2 |
- Voltage with fuel cut > 0.1V
|
| Diagnostic Time |
case1 |
- 3 valid fuel cutoff phases
|
| case2 |
|
| Mil On Condition |
|