EOP Sensor Rationality Test

The EOP sensor is checked to determine whether the sensor reading is rational for the current operating conditions. If the sensor reading is too high when engine is not running or the difference between engine running and engine off oil pressure is too small, a DTC is set. Since the sensor stuck high test can only run when the engine is not running, monitor collects oil pressure samples whenever possible, such as when the PCM is powered up, the key is on, or after engine has shut down. The sensor stuck in-range test runs and makes the pass/fail determination once per drive cycle. Since the test requires both engine running and engine off oil pressure samples, the monitor determination is made either during engine start or after engine shut down.