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 (manifold) causes the longer switching time.
: 0.77 V. To judge the 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. The maximum voltage from the sensor does not reach the specified voltage.
| DTC | CONSULT screen terms (Trouble diagnosis content) | DTC detection condition | |
| P2271 | O2 sensor signal bank 1 sensor 2 (O2 sensor signal biased/stuck rich bank 1 sensor 2) | Diagnosis condition | - |
| Signal (terminal) | Voltage signal transmitted from heated oxygen sensor 2 to ECM | ||
| Threshold |
|
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| Diagnosis delay time | - | ||
POSSIBLE CAUSE
- Harness or connectors (The heated oxygen sensor 2 circuit is open or shorted.)
- Heated oxygen sensor 2
- Fuel pressure
- Fuel injector
- Intake air leaks
FAIL-SAFE
Not applicable