I purchased a 97 civic cx hatch with a z6 swap recently, when i purchased the car hatch it had a cel for p0453 which i fixed with the potentiometer hack. Now a week later a new code pops up p1457. are these codes related or are they 2 seperate things, any input would be appreciated, also if anyone has any advice on getting rid of this code it would be greatly appreciated.
Thank you,
Roman

 

No, they are not related. You might want to check the condition of your charcoal canister, and any sensors connected to it. P1457 is an EVAP leak.

 

This is a code for a "large" Evap leak. Check to make sure all of you evap/canister/fuel tank hoses are connected or that you have a gas cap on.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jdmitr &raquo;</TD></TR><TR><TD CLASS="quote">This is a code for a "large" Evap leak. Check to make sure all of you evap/canister/fuel tank hoses are connected or that you have a gas cap on. </TD></TR></TABLE>

Gas cap is more likely to throw the P0453 than the P1457. I'm experiencing the same "Code 90" problem (P0450/453) with my 99 B18B1 swap in my 97 CX. Turns out the ecu looks for the FTP sensor, and 96-98 CX's don't have an FTP. I'm not doing the pontentimeter trick because it's not a runability issue, and I'd rather just fix it by running a chipped OBD1 ecu (OBD1 doesn't check for FTP).

 

I'm new to EK's where is the canister located on them, it was on the firewall in my crx, but nowhere to be found on the Ek

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Eran &raquo;</TD></TR><TR><TD CLASS="quote">Gas cap is more likely to throw the P0453 than the P1457. I'm experiencing the same "Code 90" problem (P0450/453) with my 99 B18B1 swap in my 97 CX. Turns out the ecu looks for the FTP sensor, and 96-98 CX's don't have an FTP. I'm not doing the pontentimeter trick because it's not a runability issue, and I'd rather just fix it by running a chipped OBD1 ecu (OBD1 doesn't check for FTP).</TD></TR></TABLE>

Gas cap should throw a p1456. I was throwing a p1457. Since it is obd2 emissions related and I planed on converting to obd1 for tuning purposes I did not fix it. After I converted, no more CEL

 

1456 is for a "small" Evap leak which "can" be from a faulty gas cap (gas cap on but loose or broken releasing pressure). 1457 is for a "Large" Evap leak which can come from several different solenoids/valves or a "Missing" gas cap!


This is exactly what the Honda Manual lists as possible causes for 1456 and 1457 dtc's...

-Fuel fill cap
-Vacuum Connections
-FuelTank
-EVAP Control Canister Vent Shut Valve
-EVAP Control Canister Vent Shut Valve Circuit
-EVAP Purge Control Solenoid Valve
-EVAP Purge Control Solenoid Valve Circuit
-EVAP Bypass Solenoid Valve
-EVAP Bypass Solenoid Valve Circuit
-Fuel Tank Pressure Sensor
-Fuel Tank Pressure Sensor Circuit
-EVAP Control Canister
-Throttle Body

 

Cleared the codes for now and it is yet to come back hopefully it was just a loose gas cap

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by teler86 &raquo;</TD></TR><TR><TD CLASS="quote">Cleared the codes for now and it is yet to come back hopefully it was just a loose gas cap</TD></TR></TABLE>

You may need to replace your gas cap as well. Sometimes, they just loose tension.

 

what website can i go to to figure out how to clear codes
i seen it on here before like a step by step that thing u should check for the cel to clear

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by theb18c1 &raquo;</TD></TR><TR><TD CLASS="quote">what website can i go to to figure out how to clear codes
i seen it on here before like a step by step that thing u should check for the cel to clear</TD></TR></TABLE>

If you've fixed the problem:

Step 1: Disconnect negative battery cable

Step 2: Drink a beer

Step 3: Reconnect negative battery cable

 

well cel came back 40 miles later

 

i undid the battery again repetedly and the CEL always comes back on while i am on the highway, i do not think it is a vacume leak since the idle is fine. any advise???