Hey what's up everyone, so ive searched and searched and searched all theae honda tech articles regaurding this issue. Heres where i am at

Ive got a 96 civic dx, d16y7 5speed. With a p2e ecu. Looking at my ecu, i have no green wire at spot D15. But when i get under my car at the front left od the gas tank under a plastic cover ive got a unit with 2 lines running to it. Is this the ftp sensor but its just not wired in? Is my ecu looking for one and i dont have one? What ecu can i swap in so its not looking for the evap system. I know this is a popular question, just havent found the answer yet. Thanks everyone, just have to pass emissions (Az) in a few days. Just got the car a few days ago

 

you'll just have to get a chipped ecu... running a p2e on an obd1 car you're bound to run into issues like this.

 

96 civic is obd1 sense when.??

 

You have an OBD2a car and ECU. Tony got thrown by your posting of code 91, which is an OBD1 version of P0453.

Do you have a hatchback, coupe or sedan?

Are you saying that you think a previous owner replaced the original P2E ECU with one that does not match your specific Civic?

If so, it looks like somebody installed a P2E ECU from a 97 Civic LX while your car requires a P2E ECU from a 96 Civic or a 97 Civic DX or CX.

 

Ah man so sorry for the confusion on code 91 vs p0543.. learned that myself just now.

I am not really sure as to what happened. I huess that would be a possible cause? I snapped a few pictrues ill post. The harness plugging into the ecu does not have the green wire on D port( cant remember what pin position off top of my head). But on the front left underside of my tank i have what may be a sensor. Just looking for a possible fix. Maybe getting a 96dx ecu??

D CONNECTOR OF ECU HARNESS

Possible ftp sensor?

D CONNECTOR from Ecu shoing missing green wire at bottom position

 

Sorry forgot to add that its a dx sedan. I added another post but not avaiable for post till after reviwed because it contains pictures

 

 

Is there anyway i can tell the difference between the two just referencing part numbers or something?

 

Not sure. You may need to contact Honda.

However, you can infer the scenario I proposed based on the fact that the stock P2E ECU for your car would NEVER throw code P0453 and only the P2E ECU from a 97 Civic LX WOULD.

If you study the service manual diagrams that I posted, you would also come to the same conclusion that I did.

 

I dont see it, but i believe you.. if you could explain your reasoning id appreciate it! I had a feeling it was the wrong ecu in there. Ill call honda and ask. I really appreciate all the help!

 

Sure. Contact Honda.

At the same time, start eBay shopping for the best price on an OBD2a P2E ECU from any 96 Civic or from a 97 Civic DX or CX.

The full explanation is found in the diagrams I posted. If you can't understand the diagrams, then you would still be taking my word for it because you won't understand my explanation either.