DTC Description
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.
MALFUNCTION A
To judge the 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 the malfunctions of heated oxygen sensor 2, ECM monitors whether the minimum voltage is excessively high during various driving conditions such as fuel cut.
- An excessively high voltage from the sensor is sent to ECM.
- The minimum voltage from the sensor is not reached to the specified voltage.
| DTC | CONSULT screen terms (Trouble diagnosis content) | DTC detection condition | ||
| P2A01 | O2 sensor bank 1 sensor 2 (O2 sensor circuit range/performance bank 1 sensor 2) | A | Diagnosis condition | - |
| Signal (terminal) | Voltage signal transmitted from heated oxygen sensor 2 to ECM | |||
| Threshold | An excessively high voltage from the sensor is sent to ECM | |||
| Diagnosis delay time | - | |||
| B | Diagnosis condition | - | ||
| Signal (terminal) | Voltage signal transmitted from heated oxygen sensor 2 to ECM | |||
| Threshold | The minimum voltage from the sensor is not reached to the specified voltage | |||
| Diagnosis delay time | - | |||
POSSIBLE CAUSE
P2A01-A
- Harness or connectors (The heated oxygen sensor 2 circuit is open or shorted.)
- Heated oxygen sensor 2
P2A01-B
- Harness or connectors (The heated oxygen sensor 2 circuit is open or shorted.)
- Heated oxygen sensor 2
- Fuel pressure
- Fuel injector
FAIL-SAFE
Not applicable