Godlike Productions - Discussion Forum
Users Online Now: 1,631 (Who's On?)Visitors Today: 20,449
Pageviews Today: 43,694Threads Today: 24Posts Today: 365
12:36 AM


Rate this Thread

Absolute BS Crap Reasonable Nice Amazing
 

Any auto mechanics on here?

 
Swearbox

User ID: 77978222
Canada
04/14/2022 05:25 PM

Report Abusive Post
Report Copyright Violation
Any auto mechanics on here?
I have a check engine issue that I don't fully understand. I just need to pick someone's brains a little. The codes thrown are P0441 and P0304. I've done some work to address this and the light went out but is back again.

Edited to add:

P0304 - I swapped out all 4 plugs for new ones (same make/model). I couldn't troubleshoot the coils by swapping them around because they're all different lengths.

P0441 - I replaced the Evap Purge Solenoid Valve with a brand new unit. Yes, it came from Amazon and I'm taking a chance but the one I picked seemed to hold up well based on reviews.

After the work was done I disconnected the battery terminals and shorted them together to drain the ECU of its memory (so i thought). I had the leads shorted for around 15 mins.

I hooked up the battery and started the car and left it to idle for around ten minutes prior to driving it around for maybe half an hour. Check Engine light was out the whole time. I parked the car for maybe an hour then had to go out again...Check Engine light was back again. I took the car to NAPA to get them to scan it and the same two codes were thrown. I asked the guy to erase the codes and he said he couldn't. I think they might be permanent codes.

My problem is that I don't know how long a permanent code will take to be removed (by the ECU) once the ECU decides that the issue that caused the code is fixed.

Last Edited by Swearbox on 04/14/2022 06:16 PM
Chill out, its just a Lancashire Rose
Anonymous Coward
User ID: 75583271
Netherlands
04/14/2022 05:26 PM
Report Abusive Post
Report Copyright Violation
Re: Any auto mechanics on here?
Must be a chevy around 2010?
T-Man
Entitled title

User ID: 78270630
Netherlands
04/14/2022 05:34 PM

Report Abusive Post
Report Copyright Violation
Re: Any auto mechanics on here?
Thread: Mechanic On Duty.... Bring me you tired, your poor, your broken down shit...
Travis Bickle
Vigilantes need love too....

User ID: 82323521
United States
04/14/2022 05:42 PM

Report Abusive Post
Report Copyright Violation
Re: Any auto mechanics on here?
Gas cap maybe an easy remedy...

[link to www.fixya.com (secure)]
One of these days... A *REAL* rain is gonna come and wash all this scum off the streets.
Swearbox  (OP)

User ID: 77978222
Canada
04/14/2022 05:42 PM

Report Abusive Post
Report Copyright Violation
Re: Any auto mechanics on here?
Must be a chevy around 2010?
 Quoting: Anonymous Coward 75583271


Its a nearly 12 year old Hyundai.
Chill out, its just a Lancashire Rose
Swearbox  (OP)

User ID: 77978222
Canada
04/14/2022 05:43 PM

Report Abusive Post
Report Copyright Violation
Re: Any auto mechanics on here?
Gas cap maybe an easy remedy...

[link to www.fixya.com (secure)]
 Quoting: Travis Bickle


Did that 2 weeks ago.
Chill out, its just a Lancashire Rose
Anonymous Coward
User ID: 79865256
United States
04/14/2022 05:44 PM
Report Abusive Post
Report Copyright Violation
Re: Any auto mechanics on here?
Gas cap maybe an easy remedy...

[link to www.fixya.com (secure)]
 Quoting: Travis Bickle


Did that 2 weeks ago.
 Quoting: Swearbox


Get an oem gas cap. The aftermarket ones tend to be crap.
Anonymous Coward
User ID: 81197635
United States
04/14/2022 05:44 PM
Report Abusive Post
Report Copyright Violation
Re: Any auto mechanics on here?
CODES P0441 AND P0304

P0441 = EVAP PURGEFLOW MONITOR that means insufficient or excessive vapor flow detected during evaporative system .
P0304= a misfire in cylinder # 3 answers to these p0441 a bad gas cap possible , and p0304 possible bad coil on cylinder #3, try clearing codes and see if they show back up or you get bad performance , then try replacing gas cap and then coil pack

[link to www.fixya.com (secure)]
Travis Bickle
Vigilantes need love too....

User ID: 82323521
United States
04/14/2022 05:45 PM

Report Abusive Post
Report Copyright Violation
Re: Any auto mechanics on here?
Gas cap maybe an easy remedy...

[link to www.fixya.com (secure)]
 Quoting: Travis Bickle


Did that 2 weeks ago.
 Quoting: Swearbox


Get an oem gas cap. The aftermarket ones tend to be crap.
 Quoting: Anonymous Coward 79865256


Here's an interesting way to deduce the 304

[link to www.fixya.com (secure)]
One of these days... A *REAL* rain is gonna come and wash all this scum off the streets.
762hillboy

User ID: 79273327
United States
04/14/2022 05:46 PM
Report Abusive Post
Report Copyright Violation
Re: Any auto mechanics on here?
P0304 means the ECU has found cylinder #4 is not firing properly. The other one I dunno
Swearbox  (OP)

User ID: 77978222
Canada
04/14/2022 05:46 PM

Report Abusive Post
Report Copyright Violation
Re: Any auto mechanics on here?
Gas cap maybe an easy remedy...

[link to www.fixya.com (secure)]
 Quoting: Travis Bickle


Did that 2 weeks ago.
 Quoting: Swearbox


Get an oem gas cap. The aftermarket ones tend to be crap.
 Quoting: Anonymous Coward 79865256


Yeah, i read that since I changed the cap but having said that I don't think its the cap. The filler top is pretty decent still. Only reason I replaced the cap is because the original one wouldn't click any more.
Chill out, its just a Lancashire Rose
Anonymous
User ID: 78070901
United States
04/14/2022 05:49 PM
Report Abusive Post
Report Copyright Violation
Re: Any auto mechanics on here?
Found it in 2 secs



[link to youtu.be (secure)]
Swearbox  (OP)

User ID: 77978222
Canada
04/14/2022 05:50 PM

Report Abusive Post
Report Copyright Violation
Re: Any auto mechanics on here?
P0304 means the ECU has found cylinder #4 is not firing properly. The other one I dunno
 Quoting: 762hillboy


P0304 is misfire in cylinder 4...I've since replaced all 4 plugs but not the coils or coil pack. Couldn't swap coils to see if it was the coil as they are all different lengths.

P0441 is Evap Control System Incorrect Purge flow...I replaced the Purge Control Solenoid valve earlier today (which pretty much all Hyundai techs who assist on the net say will fix that issue).
The part that I removed was indeed defective...wouldn't hold any vacuum at all when I tested it.

Last Edited by Swearbox on 04/14/2022 05:58 PM
Chill out, its just a Lancashire Rose
Anonymous Coward
User ID: 75253753
United States
04/14/2022 05:52 PM
Report Abusive Post
Report Copyright Violation
Re: Any auto mechanics on here?
Could also be the rubber filler neck that goes from lid opening to the tank itself. If it's crack, the computer won't sense the proper vaccum on the system.
Anonymous Coward
User ID: 82844815
04/14/2022 05:58 PM
Report Abusive Post
Report Copyright Violation
Re: Any auto mechanics on here?
If you live where road salt is used you probly have an air leak in the fuel system.
If the engine has a coil on each spark plug, switch coil 4 to plug 1 see if the code changes. Misfire could be oil leaking from can cover into spark plug well.
Anonymous Coward
User ID: 82839894
United States
04/14/2022 06:00 PM
Report Abusive Post
Report Copyright Violation
Re: Any auto mechanics on here?
Check vacuum hoses for leaks and cracks and looseness.
Swearbox  (OP)

User ID: 77978222
Canada
04/14/2022 06:00 PM

Report Abusive Post
Report Copyright Violation
Re: Any auto mechanics on here?
If you live where road salt is used you probly have an air leak in the fuel system.
If the engine has a coil on each spark plug, switch coil 4 to plug 1 see if the code changes. Misfire could be oil leaking from can cover into spark plug well.
 Quoting: Anonymous Coward 82844815


Can't swap the coils as they are all different lengths....plus I don't have an OBD2 code scanner.

Last Edited by Swearbox on 04/14/2022 06:01 PM
Chill out, its just a Lancashire Rose
Anonymous
User ID: 78070901
United States
04/14/2022 06:01 PM
Report Abusive Post
Report Copyright Violation
Re: Any auto mechanics on here?
Just Youtube Search for

Hyundai P0441 P0304
Anonymous Coward
User ID: 82844815
04/14/2022 06:04 PM
Report Abusive Post
Report Copyright Violation
Re: Any auto mechanics on here?
If you live where road salt is used you probly have an air leak in the fuel system.
If the engine has a coil on each spark plug, switch coil 4 to plug 1 see if the code changes. Misfire could be oil leaking from can cover into spark plug well.
 Quoting: Anonymous Coward 82844815


Can't swap the coils as they are all different lengths....plus I don't have an OBD2 code scanner.
 Quoting: Swearbox


Leave it to the chhinks to design coils like that.
Swearbox  (OP)

User ID: 77978222
Canada
04/14/2022 06:05 PM

Report Abusive Post
Report Copyright Violation
Re: Any auto mechanics on here?
Just Youtube Search for

Hyundai P0441 P0304
 Quoting: Anonymous 78070901


I know what the codes are and pretty much what steps to take to fix them.
Chill out, its just a Lancashire Rose
Anonymous Coward
User ID: 82844815
04/14/2022 06:06 PM
Report Abusive Post
Report Copyright Violation
Re: Any auto mechanics on here?
If you live where road salt is used you probly have an air leak in the fuel system.
If the engine has a coil on each spark plug, switch coil 4 to plug 1 see if the code changes. Misfire could be oil leaking from can cover into spark plug well.
 Quoting: Anonymous Coward 82844815


Can't swap the coils as they are all different lengths....plus I don't have an OBD2 code scanner.
 Quoting: Swearbox


Ok I get it has old fashion plug wires. I'd at least take out spark plug 4 see if its fouled, melted, or cracked.
Get a spray bottle of water, at night spray the number 4 plug wire. If there are sparks it needs replaced.
Anonymous Coward
User ID: 82844815
04/14/2022 06:08 PM
Report Abusive Post
Report Copyright Violation
Re: Any auto mechanics on here?
If you live where road salt is used you probly have an air leak in the fuel system.
If the engine has a coil on each spark plug, switch coil 4 to plug 1 see if the code changes. Misfire could be oil leaking from can cover into spark plug well.
 Quoting: Anonymous Coward 82844815


Can't swap the coils as they are all different lengths....plus I don't have an OBD2 code scanner.
 Quoting: Swearbox


Ok I get it has old fashion plug wires. I'd at least take out spark plug 4 see if its fouled, melted, or cracked.
Get a spray bottle of water, at night spray the number 4 plug wire. If there are sparks it needs replaced.
 Quoting: Anonymous Coward 82844815


Or have your old lady or dumbass friend run their hand up and down number 4 wire while running see if they get shocked.
Swearbox  (OP)

User ID: 77978222
Canada
04/14/2022 06:17 PM

Report Abusive Post
Report Copyright Violation
Re: Any auto mechanics on here?
If you live where road salt is used you probly have an air leak in the fuel system.
If the engine has a coil on each spark plug, switch coil 4 to plug 1 see if the code changes. Misfire could be oil leaking from can cover into spark plug well.
 Quoting: Anonymous Coward 82844815


Can't swap the coils as they are all different lengths....plus I don't have an OBD2 code scanner.
 Quoting: Swearbox


Ok I get it has old fashion plug wires. I'd at least take out spark plug 4 see if its fouled, melted, or cracked.
Get a spray bottle of water, at night spray the number 4 plug wire. If there are sparks it needs replaced.
 Quoting: Anonymous Coward 82844815


I already replaced all 4 plugs.
Chill out, its just a Lancashire Rose
Anonymous Coward
User ID: 71197055
United States
04/14/2022 06:18 PM
Report Abusive Post
Report Copyright Violation
Re: Any auto mechanics on here?
Must be a chevy around 2010?
 Quoting: Anonymous Coward 75583271


Its a nearly 12 year old Hyundai.
 Quoting: Swearbox


Korean piece of crap.
Anonymous Coward
User ID: 77865227
Canada
04/14/2022 06:28 PM
Report Abusive Post
Report Copyright Violation
Re: Any auto mechanics on here?
Bad coil..
ondrunn

User ID: 78318396
United States
04/14/2022 06:46 PM
Report Abusive Post
Report Copyright Violation
Re: Any auto mechanics on here?
CODES P0441 AND P0304

P0441 = EVAP PURGEFLOW MONITOR that means insufficient or excessive vapor flow detected during evaporative system .
P0304= a misfire in cylinder # 3 answers to these p0441 a bad gas cap possible , and p0304 possible bad coil on cylinder #3, try clearing codes and see if they show back up or you get bad performance , then try replacing gas cap and then coil pack

[link to www.fixya.com (secure)]
 Quoting: Anonymous Coward 81197635


Swap coils with another cylinder

See if code follows possible bad coil
TheRealRebel

User ID: 80461521
United States
04/14/2022 06:49 PM
Report Abusive Post
Report Copyright Violation
Re: Any auto mechanics on here?
I bet your engine is toast. Blown head gasket.
Copyright Disclaimer under section 107 of the Copyright Act 1976, allowance is made for “fair use” for purposes such as criticism, comment, news reporting, teaching, scholarship, education and research
Anonymous Coward
User ID: 5184682
United States
04/14/2022 06:50 PM
Report Abusive Post
Report Copyright Violation
Re: Any auto mechanics on here?
I have a check engine issue that I don't fully understand. I just need to pick someone's brains a little. The codes thrown are P0441 and P0304. I've done some work to address this and the light went out but is back again.

Edited to add:

P0304 - I swapped out all 4 plugs for new ones (same make/model). I couldn't troubleshoot the coils by swapping them around because they're all different lengths.

P0441 - I replaced the Evap Purge Solenoid Valve with a brand new unit. Yes, it came from Amazon and I'm taking a chance but the one I picked seemed to hold up well based on reviews.

After the work was done I disconnected the battery terminals and shorted them together to drain the ECU of its memory (so i thought). I had the leads shorted for around 15 mins.

I hooked up the battery and started the car and left it to idle for around ten minutes prior to driving it around for maybe half an hour. Check Engine light was out the whole time. I parked the car for maybe an hour then had to go out again...Check Engine light was back again. I took the car to NAPA to get them to scan it and the same two codes were thrown. I asked the guy to erase the codes and he said he couldn't. I think they might be permanent codes.

My problem is that I don't know how long a permanent code will take to be removed (by the ECU) once the ECU decides that the issue that caused the code is fixed.
 Quoting: Swearbox


Hyundai-forums:

PO441: [link to www.hyundai-forums.com (secure)]

PO304: [link to www.hyundai-forums.com (secure)]
Anonymous Coward
User ID: 5184682
United States
04/14/2022 07:01 PM
Report Abusive Post
Report Copyright Violation
Re: Any auto mechanics on here?
I bet your engine is toast. Blown head gasket.
 Quoting: TheRealRebel


I hope the OP doesn't have this Hyundai:

""The National Highway Traffic Safety Administration announced a recall for Hyundai Sonata sedans from the 2011 and 2012 models years because of the potential for a major engine failure.""

[link to www.consumerreports.org (secure)]
TheRealRebel

User ID: 80461521
United States
04/14/2022 07:04 PM
Report Abusive Post
Report Copyright Violation
Re: Any auto mechanics on here?
I bet your engine is toast. Blown head gasket.
 Quoting: TheRealRebel


I hope the OP doesn't have this Hyundai:

""The National Highway Traffic Safety Administration announced a recall for Hyundai Sonata sedans from the 2011 and 2012 models years because of the potential for a major engine failure.""

[link to www.consumerreports.org (secure)]
 Quoting: Anonymous Coward 5184682


That would be good news.
If its a recall he should get it replaced.
Copyright Disclaimer under section 107 of the Copyright Act 1976, allowance is made for “fair use” for purposes such as criticism, comment, news reporting, teaching, scholarship, education and research
Anonymous Coward
User ID: 79104722
United States
04/14/2022 07:14 PM
Report Abusive Post
Report Copyright Violation
Re: Any auto mechanics on here?
No such thing as "permanent codes".

You cleared the light but didn't fix the problem.





GLP