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DTC codes / P22xx · Fuel and air metering (injector circuits) / P225E
P225E means the engine computer has determined that the downstream nitrogen oxide (NOx) sensor on bank 1 is reporting a signal that is stuck high or biased high compared to what the exhaust conditions should produce. The computer monitors the sensor's voltage or current output and flags this code when the reading remains abnormally elevated for too long, indicating a sensor or circuit fault rather than a normal rich NOx condition.
Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.
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