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.
MALFUNCTION A
To judge malfunctions of heated oxygen sensor 2, ECM monitors whether the voltage is unusually high during various driving conditions such as fuel cut.
MALFUNCTION B
To judge malfunctions of heated oxygen sensor 2, ECM monitors whether the minimum voltage of sensor is sufficiently low during various driving conditions such as fuel cut.
| DTC No. | CONSULT screen terms (Trouble diagnosis content) |
DTC detecting condition | |
|---|---|---|---|
| P2270 | O2 sensor signal bank 1 sensor 2 [O2 sensor signal biased/stuck lean bank 1 sensor 2] |
A | An excessively high voltage from the sensor is sent to ECM. |
| B | The minimum voltage from the sensor is not reached to the specified voltage. | ||
POSSIBLE CAUSE
A
- Harness or connectors (The sensor circuit is open or shorted)
- Heated oxygen sensor 2
B
- Harness or connectors (The sensor circuit is open or shorted)
- Heated oxygen sensor 2
- Fuel pressure
- Fuel injector
FAIL-SAFE
Not applicable