DTC Description
DTC DETECTION LOGIC
The heated oxygen sensor 2 has a much longer switching time between rich and lean than the air fuel ratio (A/F) sensor 1. The oxygen storage capacity of the three way catalyst 1 causes the longer switching time. To judge malfunctions of heated oxygen sensor 2, ECM monitors whether the maximum voltage of the sensor is sufficiently high during various driving conditions such as fuel-cut.
| : 0.74 V |
| DTC No. | CONSULT screen terms (Trouble diagnosis content) |
DTC detecting condition |
|---|---|---|
| P2271 | O2 sensor signal bank 1 sensor 2 (O2 sensor signal biased/stuck rich bank 1 sensor 2) |
|
POSSIBLE CAUSE
- Harness or connectors (The sensor circuit is open or shorted)
- Heated oxygen sensor 2
- Fuel pressure
- Fuel injector
- Intake air leaks
FAIL-SAFE
Not applicable