P0450

DTC P0450 EVAPORATIVE EMISSION CONTROL SYSTEM PRESSURE SENSOR MALFUNCTION

CIRCUIT DESCRIPTION

DTC Detecting Condition:

The vapor pressure sensor, VSV for Canister Closed Valve (CCV) and VSV for pressure switching valve are used to detect an abnormality in the evaporative emission control system.

The ECM decides whether or not there is an abnormality in the evaporative emission control system by the vapor pressure sensor signal.

DTC P0450 or P0451 is recorded by the ECM when the vapor pressure sensor malfunctions.

Wiring Diagram:

Step 1 - 2:

Step 3:

INSPECTION PROCEDURE

HINT:
- If DTC P0441, P0446, P0450 or P0451 is output after DTC P0440, first troubleshoot DTC P0441 P0446 P0450 or P0451. If no other malfunctions than them are detected, troubleshoot DTC P0440 next.

- If different DTCs that are related to different Systems are output simultaneously while terminal E2 is used as a ground terminal, terminal E2 may be open.

- Read freeze frame data using the hand-held tester or the OBD II scan tool, as freeze frame data records the engine conditions when a malfunction is detected. When troubleshooting, this is useful for determining whether the vehicle was running or stopped, the engine was warmed up or not, the air-fuel ratio was lean or rich, etc. at the time of the malfunction.

- When the ENGINE RUN TIME in the freeze frame data is less than 200 seconds, carefully check the vapor pressure sensor.