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How can I fix P0452. Thanks.

Vehicle: 2008 Dodge Grand Caravan SXT, 3.8L

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The code is for the evap pressure switch stuck closed.

  • When Monitored: Immediately after key off.
  • Set Condition: At key off, the PCM energizes the Purge Solenoid for a calibrated amount of time (30 seconds maximum) and stores the state of the ESIM switch. The state is evaluated again at the next key on. If the PCM does not detect that the ESIM switch is open, an error is detected. Two Trip Fault. Three good trips to turn off the MIL.

While there are many things that can cause the code, the most common problem is the purge control valve. If the valve is stuck closed, then the vapors are not removed from the canister and the pressure switch will report that it is stuck closed. This is because the pressure sensor will not see the pressure in the fuel tank lower as it should.

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