P0452, smell of gas

Old 03-21-2016, 10:49 PM
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Join Date: Jan 2015
Posts: 3
Default P0452, smell of gas

Hello all, in case it's not posted somewhere, the car is a 2003 Chrysler 300m. The problem started with trouble codes p0452 and p0441, with a smell of gas coming from the car. I had it diagnosed in a shop and they told me the canister/nvld pump needed to be replaced for starters, and that the system needed to be rechecked. I replaced the unit myself with a non-oem part (from RockAuto) which wasn't too much trouble. Now the 0441 code is gone, but the 0452 code keeps coming back and smell of gas remains. I can't afford to pay any more diag fees right now so can anyone guesstimate the most probable PART that needs to be replaced, given the remaining symptoms? Thanks
Old 03-22-2016, 12:18 PM
Senior Member
Join Date: Sep 2012
Location: Somerset N.J.
Posts: 394

Good video on NVLD testing and operation. Can access the connector under the rear seat.
P0452 indicates the NVLD switch is not working properly
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