Bye bye Honda...
Car: Volvo V60 VEA D4 (181)
Join Date: 11th May 2012
Location: Ludlow, UK
Thanked 1,265 Times in 1,042 Posts
Me neither, at least on the Civic. I had an Accord and the heater was adjacent to the filter.
Logically it should be somewhere you've been working though, or you wouldn't have disturbed it?
I've just looked in the official Honda workshop manual for your Civic and the fuel heater is located above/behind the filter in the schematic, as though you are standing in front of the car looking under the bonnet.
The manual also says there's a software fix for P1031 problems, but if was OK before you did the filter then I guess it probably isn't the software!
Last edited by Jon_G; 31st March 2018 at 19:34.