P0420 code fixed now (new cat) now p1441 code
P0420 code fixed now (new cat) now p1441 code
My 2002 SSEI is throwing a p1441 manufacturers control auxiliary emission control code.Advance scanned and gave me this info and sent me to a local transmission shop were he says they can pinpoint the codes.Got it there and after scanning it guy said immediately was probably a piece of trash in the egr valve and i needed to clean it.Most of the posts i read here says its likely the purge solenoid.I noticed the solenoid is alot cheaper so i am hoping its the later.What you guys think? Is transmission shop scanners more accurate than advance autopart scanners and should i just clean the egr 1st and assume the guy knows what he is talking about?
- Archon
- Resident Gearhead

- Posts: 8781
- Joined: Mon May 19, 2008 10:30 pm
- Year and Trim: 2014 Cadillac XTS Vsport.
- Location: Grand Rapids, Michigan
Re: P0420 code fixed now (new cat) now p1441 code
With the code indicating that the evap purge solenoid is stuck open, I don't know why they would think the EGR was involved. Check the vacuum hoses and connections. Also check to be sure the vacuum canister under the car is not damaged. If they're fine, the most like suspect is the solenoid itself.
*Gone, but not forgotten* - Black 2000 SSEi, HIR Headlights, Angel Eyes fogs, 3rd brake light overlay, hi-flo cat, 180 degree thermostat, HS 1.9 rockers, LSx yellow springs, Intense FWI, PCM, shift kit, push rods, and 3.4 Pulley. ZZP Power Log.
Re: P0420 code fixed now (new cat) now p1441 code
Archon thanx for info!
Re: P0420 code fixed now (new cat) now p1441 code
Checked the vacuum lines and canister today all looks well.Was hoping to get the evap purge solenoid switched out but it will not be here till monday:( ( ordered) The check gas cap light has been coming on and going off as it wishes at certain times.Things i tried on that so far is clean the rust off and bought a new cap, to no avail.Could the gas cap light also be coming on due to a bad evap purge solenoid?
- Archon
- Resident Gearhead

- Posts: 8781
- Joined: Mon May 19, 2008 10:30 pm
- Year and Trim: 2014 Cadillac XTS Vsport.
- Location: Grand Rapids, Michigan
Re: P0420 code fixed now (new cat) now p1441 code
Yes, that is one of the many things that will set that code.
*Gone, but not forgotten* - Black 2000 SSEi, HIR Headlights, Angel Eyes fogs, 3rd brake light overlay, hi-flo cat, 180 degree thermostat, HS 1.9 rockers, LSx yellow springs, Intense FWI, PCM, shift kit, push rods, and 3.4 Pulley. ZZP Power Log.
Re: P0420 code fixed now (new cat) now p1441 code
Canister Vent Valve is what advance tryed giving me instead of purge solenoid..got solenoid replaced but check engine light and gas cap light still there.Canister Vent Valve maybe bad? If so this could maybe cause the gas cap light to stay on?
Last edited by gold8165 on Fri Mar 25, 2011 7:58 pm, edited 1 time in total.
Re: P0420 code fixed now (new cat) now p1441 code
Wooohooo fixed!! After changing Canister Vent Valve check engine light and check gas cap light went out.
Last edited by gold8165 on Sat Mar 26, 2011 10:15 am, edited 1 time in total.
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mrbul35
- SE Member

- Posts: 14
- Joined: Fri Apr 29, 2011 10:21 pm
- Year and Trim: 2000 SSEi
- Location: Ottawa Illinois
Re: P0420 code fixed now (new cat) now p1441 code
Ok, I'm having the same issues, check gas cap, CEL. where is the vapor canister at and what will the vent and solenoid look like and where will they be at? 2000 SSEi. Thanks, Aaron


