P0441 permanent evap code

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kupperpooh

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May 17, 2023
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Ram Year
2017
Engine
Hemi
I have a 2017 dodge ram with a permanent p0441 evap code. I know I had forgot to put the gas cap on once. I've replaced the fuel cap and purge valve already. Any other thoughts to get code off? Does dealer have to reset it since it says permanent?
 

csuder99

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May 28, 2014
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Ram Year
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Hemi 5.7
Permanent codes are just another stupid idea from the emissions nazis, they can not be cleared by a scan tool or disconnecting the battery. However they will disappear if the underlying problem has been fixed. I had that on my Wrangler with a failed open thermostat.

P0441 is "incorrect purge flow". From what I gathered on Chrysler vehicles the PCM pulses the purge valve and wants to see the O2 sensors reading rich from the fuel vapors coming out of the charcoal canister. So check all the lines from the purge valve back and also the connection to the intake. Also put the finger on the purge valve and feel if it pulses (after warmup).
 
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