P2415 indicates that the upstream oxygen sensor on bank 2 (sensor 1) is not providing a valid exhaust‑gas sample to the powertrain control module. The code is set when the sensor’s signal is out of range, missing, or inconsistent with expected values during closed‑loop operation.
The sensor’s internal heater may be open or shorted, or the zirconia element may be contaminated, preventing a proper voltage signal.
Damaged, corroded, or loose wires and connectors between the sensor and the control module can interrupt the signal or heater circuit.
A leak upstream of the sensor allows fresh air to mix with exhaust, causing an erroneous sample reading.
Oil, coolant, or excessive fuel additives can coat the sensor tip, degrading its response.
A defective PCM/ECM input circuit is a rare cause and should be considered only after all sensor‑side issues are ruled out.
No. The PCM is rarely the cause; the code almost always points to the sensor, its wiring, or an exhaust leak.
Yes. A leak upstream of the sensor lets ambient air enter the exhaust stream, producing an invalid sample.
Not without diagnosis. Verify heater resistance, wiring integrity, and exhaust sealing first to avoid unnecessary replacement.
Clearing only removes the stored code; the underlying fault will cause the code to return until the root cause is repaired.