Hello,

I want to know if there is a way to reset yourself the computer system of Honda civic 99 model to clear the P1456 error code.

P1456 Evaporative Emissions (EVAP) Control System Leakage (Fuel Tank System)

My car failed the smog functional test due to this code which started showing up when I forgot to put the fuel cap. But now its there, still the car computer doesn't detect it.

Any advice is welcome.

Thanks
Sumit

 

just unplug the negative battery cable for like 15 minutes and then put it back on, thats how you reset the computer. next time try a search as i myself asked this question, peace, and good luck.

 

Another method is to pull the 15 A & 7.5 A fuses at the top left of the fuse box.

 

Thanks for your quick response. Can you please provide details about the location of the negative battery cable in the car.

thanks,
Sumit

 

Thanks for your quick response. Can you please provide details about the location of the fuse box in the car.
thanks,
Sumit

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by timus &raquo;</TD></TR><TR><TD CLASS="quote">Can you please provide details about the location of the negative battery cable in the car. </TD></TR></TABLE>



Its the cable attached between your battery and the frame....usually about 8-10" in length.

 

To clear the codes just pull the second fuse at the top of the underhood fuse box. I thinks it raio back up or something like that. 30 seconds and the code should be clear unless there is actually a problem like a deformed o-ring in the gas cap.

 

Thanks a lot to everyone. Pulling off the fuses did it. I hope the car can now pass the smog check.

thanks,
Sumit