zakiu

My '02 S2000 is throwing a P0410 and a P1456

P0410 Secondary Air Injection System Malfunction
P1456 EVAP Emission Control System Leak Detected (Fuel Tank System)

I just purchased the car and it looks like the car was hit on the rear driver's side, where the fuel inlet is, a long time ago. The seller was hiding the check engine light. When you drive the car with the windows up, you can barely smell anything, but when you roll the windows down while driving you can smell fuel in the cabin of the vehicle. There is usually a fuel smell in the trunk as well. I have no idea how to go about diagnosing the problem beyond running the codes. I've pulled the carpet away in the trunk and am looking around, but don't know what to look for. Does anyone here know? I am guessing there is some repair work that needs to be done.

The car is a 2002 with about 70k miles.

I am mostly concerned about the P1456. When it is fixed, the P0410 should clear itself or I suspect it may be an easy fix afterwards. Does anyone have any experience with this? If so, any help would be appreciated. I'd hate to pay the dealer if I can figure it out through research. If anyone is willing to help, I can take pictures.

Billman250

The P0410 is an electrical air pump malfunction and has nothing to do with your fuel smell or the P1456.

The P1456 is a tank side pressure leak, thats why you are smelling fumes.

A smoke tester will easily find the leak...I'm guessing its by the tank fill, since thats where the damage is.

zakiu

I'm not really sure I understand what it means when it says tank side. Does that mean it could be the filler neck, or that the pressure leak is inside the tank? I'll inspect it a bit more thoroughly tonight and take some photos. All I really understand so far is that the cabin smells like fuel, especially when the windows are down. It's pretty intense.

Awesome. I've replaced a secondary air pump before. IIRC it was pretty easy. Bumper off, swap part, bumper on.

Billman250

Not necessarily a bad pump, but an electrical failure of the system.

A tank leak could be the tank, fill tube, cap, or any line leading away from the tank, up to any of the EVAP valves. After those valves, it becomes a P1457 for evap leak on the canister side.

zakiu

Thanks Billman. I hear a lot of guys swap CAIs into the car and take out the pumps, and when they reconnect them they hook them up backwards. I'll do some diagnosis before I run out and grab parts.

I'm not really equipped to tackle gas problems. I don't have any tools here in Atlanta, but there's apparently a good place called Blake's Automotive. May end up taking it there for the EVAP code, but not sure what to expect. Have any idea what best case / worst case scenarios might be, in hours spent? I'll call and get his labor rate.

zakiu

Billman250

Just ask the shop if they have a smoke machine, and are familiar with finding evap leaks.

If not, go to a shop that does.

zakiu

I also noticed in the last few weeks driving that sometimes I can smell the gas smell and sometimes I can't. Any idea why it would be an intermittent smell? Once it was strong as hell, but I haven't developed a correlation between driving it easy/hard or strong/gentle turning. Any ideas?

zakiu

"The OEM Honda scanner will run and evap test where you start the car and let it idle, then it energizes the solenoids while monitoring the pressure sensor voltage. After about 5-10 minutes it tells you if the system will or will not set an evap code. If the vehicle fails the scanner test, we then use a smoke machine to check for leaks." -- Sounds like a good shop to me - I'll take it there and update the post with what happens.

zeroptzero

Have you looked at the three hose connections that attach to the fuel fill pipe?. Under the black rubber accordion piece there are 3 hoses, if they are loose or the clamps are loose/missing it will allow fumes to enter the car. Pull the rubber boot back and inspect the three hose connections make sure they are clamped tightly. I just replaced my fuel fill pipe due to the common problem many pre-2003 models had with the fuel pipe neck.