Keep to the code: P 1456.
#1
02-05-2015, 08:36 PM
Keep to the code: P 1456.
I have the code now.
2002 Honda accord EX, 4 cyl. I keep getting "check engine" light. Replaced gas cap twice now, one with Walmart cap, now with Honda cap. Check engine stays on, although the the time before tonight it was read, and went out for few days. Now back.
Advance store says code is P 1456, Evap emissions control fuel tank. Salesman at Advance said it could be a shorted Evap selanoid valve under the gas tank.
Any ideas?
I am selling this great car as soon as our 2015 CRV arrives. This has indeed been a great car, 178000 almost totally trouble free miles.
2002 Honda accord EX, 4 cyl. I keep getting "check engine" light. Replaced gas cap twice now, one with Walmart cap, now with Honda cap. Check engine stays on, although the the time before tonight it was read, and went out for few days. Now back.
Advance store says code is P 1456, Evap emissions control fuel tank. Salesman at Advance said it could be a shorted Evap selanoid valve under the gas tank.
Any ideas?
I am selling this great car as soon as our 2015 CRV arrives. This has indeed been a great car, 178000 almost totally trouble free miles.
#2
02-06-2015, 10:27 AM
There are a few EVAP solenoids in the system. The most common one to fail is the one on the left rear near the fuel tank, but the best way is to test each solenoid manually and see if each one clicks when power is applied. You want to have that fixed because a shorted EVAP solenoid can toast the computer which you don't want. Good luck and welcome to the HAF.
#3
02-06-2015, 11:14 AM
P1456 is an EVAP leak in the tank system.
If it were the common vent-shut valve, that should throw P1457 instead.
Basically, the PCM thinks your fuel tank isn't airtight like it should be. Fuel cap is only one possibility. Leaky cover at the top of your fuel tank, where the fuel pump and/or fuel gauge sender are installed? Any of the hoses associated with the fill pipe? Do you smell gasoline anywhere?
The EVAP canister is underneath the car, sorta below the left-rear seat. Look under there for any rubber vacuum hoses that are cracked, rotting, etc. I think most of them would throw P1457, but a couple of those hoses are associated with the fuel-tank pressure sensor. (the system uses that sensor to tell whether the fuel tank is airtight)
If it were the common vent-shut valve, that should throw P1457 instead.
Basically, the PCM thinks your fuel tank isn't airtight like it should be. Fuel cap is only one possibility. Leaky cover at the top of your fuel tank, where the fuel pump and/or fuel gauge sender are installed? Any of the hoses associated with the fill pipe? Do you smell gasoline anywhere?
The EVAP canister is underneath the car, sorta below the left-rear seat. Look under there for any rubber vacuum hoses that are cracked, rotting, etc. I think most of them would throw P1457, but a couple of those hoses are associated with the fuel-tank pressure sensor. (the system uses that sensor to tell whether the fuel tank is airtight)
#4
02-06-2015, 12:14 PM
After refueling, tighten the fuel cap at least three clicks.
DTC P1456 is a two-trip code. Once cleared from PCM memory, this code cannot be reproduced in one drive cycle. Additional test drives may be required to reproduce all driving and ambient conditions required to set this code.
The following is a diagram from the service manual of areas to check for leaks.
DTC P1456 is a two-trip code. Once cleared from PCM memory, this code cannot be reproduced in one drive cycle. Additional test drives may be required to reproduce all driving and ambient conditions required to set this code.
The following is a diagram from the service manual of areas to check for leaks.
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