P0455 / P0456 Check Engine Code

Cargo

Member
First Name
Russ
Joined
Jul 2, 2018
Threads
2
Messages
12
Reaction score
2
Location
Kentucky
Vehicle(s)
2017 Civic Sedan Touring
Vehicle Showcase
1
Country flag
17 Civic 1.5T was sitting a couple of days in airport parking and on start up it threw up the Check Engine light with Emissions Evap message. I got the ODB2 read and it popped up those two codes. I called service at dealership and they didn't seem to know too much other than i should drop the car off for a couple of days to get checked out. I was reading online, it appears the Vapor Canister Purge Valve is the most likely culprit. Anyone have a link to the part # or source for one. Anoyone with experience with this issue? TIA
Sponsored

 

Telly

Senior Member
Joined
Mar 23, 2020
Threads
7
Messages
89
Reaction score
72
Location
Chester County, PA
Vehicle(s)
2018 Civic EX Hatch
Country flag
First thing I would check is the flap seal on fuel tank filler tube.

Flap Seal.JPG
My 18 EX Hatch is still under the bumper to bumper warranty. I just don’t want to get shafted when I go into the dealer and they try to steal my money over something stupid. I’m not the biggest car guy, so I definitely can’t call bullshit on what they tell me about the evap system.
 

jayy_swish

Senior Member
First Name
Jay
Joined
Mar 10, 2020
Threads
18
Messages
1,291
Reaction score
890
Location
Los Angeles
Vehicle(s)
2019 Honda Civic Sport Touring
Country flag
My 18 EX Hatch is still under the bumper to bumper warranty. I just don’t want to get shafted when I go into the dealer and they try to steal my money over something stupid. I’m not the biggest car guy, so I definitely can’t call bullshit on what they tell me about the evap system.
If it’s under warranty then you should not have to pay for anything not even the diagnostic inspection it’s all covered under warranty, parts included. The only time they charge you is if they can prove you are at fault for causing the damage. Now if one dealership says they won’t do the repairs (which I highly doubt) just shop around at other dealerships, some are more aggressive at denying warranty stuff than others. It all comes down to how much they care about customers and not profits since each dealer has different managers. Just make sure the CEL is on with the code so they can pull it with their reader, if the code isn’t showing then it’s harder for them to repair it since you’ll have to “replicate the issue”, but it’s still good practice to take it in regardless. They won’t be able to do anything because it wasn’t replicated, but there would be written proof of the occurrence so when it happens again.
 


fitter_here

Senior Member
Joined
Apr 2, 2016
Threads
3
Messages
762
Reaction score
330
Location
Ste-Anne-des-Plaines, Quebec, Canada
Vehicle(s)
Civic LX 2016 Sedan
Country flag
My 18 EX Hatch is still under the bumper to bumper warranty. I just don’t want to get shafted when I go into the dealer and they try to steal my money over something stupid. I’m not the biggest car guy, so I definitely can’t call bullshit on what they tell me about the evap system.
If your car is under warranty, take it to the dealer.
Good luck

Honda Civic 10th gen P0455 / P0456 Check Engine Code Warrenties.JPG
 

Telly

Senior Member
Joined
Mar 23, 2020
Threads
7
Messages
89
Reaction score
72
Location
Chester County, PA
Vehicle(s)
2018 Civic EX Hatch
Country flag
If your car is under warranty, take it to the dealer.
Good luck

Warrenties.JPG
Thanks for the advice (Jayy_swish too). I made an appointment with my dealer for service drop off Thursday Night with service being on Friday. I will keep y’all updated with how this plays out and what parts need to be replaced if they do opt to fix it for me!
 

Gruber

Senior Member
First Name
Mark
Joined
Jan 27, 2018
Threads
2
Messages
2,309
Reaction score
1,521
Location
TN
Vehicle(s)
2018 Honda Civic Sport Touring; 2009 Honda CR-V EX-L
Country flag
On warranty it's no brainer: let them fix it and they don't usually deny this kind of warranty repairs. All they could accuse you of doing, if they really cared to try, is overfilling the fuel tank (did you do it?:eek:) . After warranty it's a completely different ball of wax. I had this kind or similar EVAP system code in my CRV and drove with it for at least a year, until I gave the car to my personal wife and she wouldn't take delivery with the CEL light coming on and off. :thumbsdown: This can have many reasons, but some are much more common then others. The dealer threatened substantial costs to pretend to trace it down, while it was easy to find out what was wrong and fix it by myself at the parts cost of less than $30.
 

Telly

Senior Member
Joined
Mar 23, 2020
Threads
7
Messages
89
Reaction score
72
Location
Chester County, PA
Vehicle(s)
2018 Civic EX Hatch
Country flag
So when I brought the car in for service I flashed my ECU back to stock from the TSP stage 1 (I was paranoid they’d see I tuned it and void my warranties) and with that the check engine code and history of the code was cleared so I ended up getting nothing fixed :doh:

here’s to riding around on the factory tune until the light comes back on!:banghead:
 

Louiemark

Senior Member
Joined
Jun 6, 2017
Threads
8
Messages
58
Reaction score
57
Location
San Diego, CA
Vehicle(s)
2017 Honda Civic Hatchback Sport
Country flag
So when I brought the car in for service I flashed my ECU back to stock from the TSP stage 1 (I was paranoid they’d see I tuned it and void my warranties) and with that the check engine code and history of the code was cleared so I ended up getting nothing fixed :doh:

here’s to riding around on the factory tune until the light comes back on!:banghead:
did the codes ever come back on factory tune?
 


Telly

Senior Member
Joined
Mar 23, 2020
Threads
7
Messages
89
Reaction score
72
Location
Chester County, PA
Vehicle(s)
2018 Civic EX Hatch
Country flag
did the codes ever come back on factory tune?
They did. My codes usually throw when I reach half a tank remaining. I found that the cause of the codes is something pierced a hole in my valve canister by my rear axle on the passenger side.

gonna try to patch the hole this weekend with some epoxy or something to try to avoid buying a new part
 

Louiemark

Senior Member
Joined
Jun 6, 2017
Threads
8
Messages
58
Reaction score
57
Location
San Diego, CA
Vehicle(s)
2017 Honda Civic Hatchback Sport
Country flag
They did. My codes usually throw when I reach half a tank remaining. I found that the cause of the codes is something pierced a hole in my valve canister by my rear axle on the passenger side.

gonna try to patch the hole this weekend with some epoxy or something to try to avoid buying a new part
Let me know how it goes, the same codes popped up for me and I’ve been trying to figure it out for a few months now. I’ve already changed the canister but it came back
 

Telly

Senior Member
Joined
Mar 23, 2020
Threads
7
Messages
89
Reaction score
72
Location
Chester County, PA
Vehicle(s)
2018 Civic EX Hatch
Country flag
Let me know how it goes, the same codes popped up for me and I’ve been trying to figure it out for a few months now. I’ve already changed the canister but it came back
When I got quoted for the replacement at Honda I was also advised to replace the CVS Valve. Did you replace that as well?
 

Louiemark

Senior Member
Joined
Jun 6, 2017
Threads
8
Messages
58
Reaction score
57
Location
San Diego, CA
Vehicle(s)
2017 Honda Civic Hatchback Sport
Country flag
When I got quoted for the replacement at Honda I was also advised to replace the CVS Valve. Did you replace that as well?
Yup also changed that, I think I might bring it to the dealership this weekend. I’m hoping it’s not the tank
 

Telly

Senior Member
Joined
Mar 23, 2020
Threads
7
Messages
89
Reaction score
72
Location
Chester County, PA
Vehicle(s)
2018 Civic EX Hatch
Country flag
Yup also changed that, I think I might bring it to the dealership this weekend. I’m hoping it’s not the tank
You may just need to take it somewhere to get the code locked to your computer erased. I know on my OBD-2 scanner it has two codes locked to the car that need to be erased by a Honda scan tool (maybe a good body shop has one capable of this. Not entirely sure.)

if you have an OBD-2 try scanning the codes again and clearing them to see if two remain that cannot be cleared with an OBD-2
Sponsored

 


 


Top