DTC P0450: Evaporative Emission System Pressure Sensor/Switch
WARNING: This page does not describe the selected car, but rather 32 other vehicles, including the 2011 Mercury Milan, 2011 Mercury Mariner, 2011 Mercury Grand Marquis, 2011 Lincoln Town Car, and 2011 Lincoln Navigator L. However, it is still accessible from the selected car via links, so may be relevant.
P0450 - EVAPORATIVE EMISSION SYSTEM PRESSURE SENSOR/SWITCH
| Description: | The powertrain control module (PCM) monitors the evaporative emission (EVAP) system natural vacuum leak detection (NVLD) module vacuum switch input signal to the PCM. The test fails when the signal input is not responding as expected. | ||
| Possible Causes: |
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| Diagnostic Aids: | Monitor the EVAP_SWITCH PID for a change in state to verify NVLD module operation. | ||
| Application | Key On Engine Off | Key On Engine Running | Continuous Memory |
| All | GO to PINPOINT TEST HZ . | ||