P0452
DTC P0452 EVAPORATIVE EMISSION CONTROL SYSTEM PRESSURE SENSOR/SWITCH LOW INPUTCIRCUIT DESCRIPTION
DTC Detection Condition:
The Fuel Tank Pressure (FTP) sensor, the Evaporative Emissions (EVAP) Vacuum Switching Valve (VSV), Canister Closed Valve (CCV) and by-pass VSV are used to detect abnormalities in the EVAP control system. The ECM decides whether or not there is an abnormality in the EVAP system based on the FTP sensor signals.
MONITOR DESCRIPTION
Monitor Strategy:
Typical Enabling Conditions Part 1:
Typical Enabling Conditions Part 2:
Typical Malfunction Thresholds:
Component Operating Range:
P0452
When pressure indicated by the FTP sensor deviates below -4,000 Pa (-30 mmHg) (P0452) or above 2,000 Pa (15 mmHg) (P0453), the ECM interprets this as a malfunction in the FTP sensor. The ECM illuminates the MIL and sets a DTC.
Wiring Diagram:
Step 1 - 2:
Step 3:
INSPECTION PROCEDURE
HINT:
- If DTC P0441 (purge flow), P0446, P2418 (CCV or by-pass VSV), P0451, P0452 or P0453 (FTP sensor) is output with DTC P0442, P0455 or P0456, first troubleshoot DTC P0441, P0446, P2418, P0451, P0452 or P0453. If no malfunction is detected, troubleshoot DTC P0442, P0455 or P0456 next.
- Read freeze frame data using the hand-held tester. Freeze frame data records the engine conditions when a malfunction is detected. When troubleshooting, it 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 FTP sensor.
CHECK FOR INTERMITTENT PROBLEMS
HINT: Inspect the vehicle's ECM using check mode. Intermittent problems are easier to detect when the hand-held tester is in check mode. In check mode, the hand-held tester uses 1 trip detection logic, which has a higher sensitivity to malfunctions than normal mode (default), which uses 2 trip detection logic.
a. Clear the DTCs.
b. Set the check mode.
c. Perform a simulation test.
d. Check the connector and terminal.
e. Wiggle the harness and the connector.