Whatislove

So I snagged my rear O2 sensor on rough snow when parking. The wires came out the clip and got frayed so I couldn't solder them back in. I ordered a new sensor, I had trouble putting it in myself, was very rusted and I didn't have access to jacks, so I took it to Pepboys for them to install it. First they replaced the wrong sensor, they replaced the front O2 one coming out the exhaust manifold. Then they replaced the right one and reset my check engine light which has been on from the time the sensor got disconnected.

Now the following day my check engine light came on, Pepboys wouldn't do anything without further payment so I went to Autozone and had them give me a free readout. They came up with the following error codes.
P1298 which is a short circuit or a failed ECM
P0420 which is a defective catalyst either by an engine misfire, vacuum leak or engine oil leaking.

Now my car is in great shape, I cant imagine I'm having any engine problems, no boost, been using Royal Purple for 45K, engine runs smooth.

Since Pepboys are being dicks and don't do exhaust or ECM work anyway, I made an appointment with my repair shop who had done my breaks, exhaust and suspension work for me in the past to take a look at my car. But in the meantime the check engine light came back off and hasn't come up again.

I wounder if something is lose or wet. What should I look for under the hood to see what can be causing this problem? Otherwise its $50 for my guy to take a look at everything, if the light comes back on again.

Whatislove

Update:
Check engine light came back on after 170 miles and has been on for the last 60

Whatislove

anyone?

Whatislove

The light stayed on for 30 miles and came off, been off for 4 days now....

random chaos 85

the p1298 is a faulty electric load detector. its in the underhood fuse box next to the battery. go get one from honda. make sure you get just the eld and not the whole fuse box. sometimes they try to sell you the whole box but its not necessary. all you need is the eld.

random chaos 85

p.s. its very easy to change on your own. just make sure u disconnect the battery.

Whatislove

there are a lot of fuses and relayes inside that box, know which one it is?

random chaos 85

its not a fuse or circuit breaker or relay, looks kinda like a bigger relay but its not. its about the size of a relay, maybe a lil bigger and has a metal bar running thru it. thats how its senses the electrical load on the system. if you go buy one so u kno what it looks like, then its very easy to find in the fuse box. takes 10-15mins to change.

Whatislove

which one is it?
there are two of what you describe

It Wasn't Me

A few seconds + Google = It's the flat brown one.

random chaos 85

u have to remove the big 80A and 40A fuses to get it out. you have to unplug it on the bottom of the fuse box so u have to take the fuse box out. again, make sure u disconnect the battery. its very simple to change. u have to unplug a couple things but everything only plugs in in one place. u cant mess it up. at least i hope not.

Whatislove

Cool, thank you.

Also, I cant seem to find this part on honda auto parts. They only have the entire fuse box and it comes with that according to them
http://www.hondaautomotiveparts.com/...T+(ENGINE+ROOM)


Local honda dealer has that part for a 4door only for $37, but for an 01EXcoupe its the whole fusebox

random chaos 85

argue with them a little longer. u CAN get it separately. there is a technical service bulletin about it. $37 sounds about right.

Targa250R

Just ask for part number 38255-S5A-003.

It Wasn't Me

http://www.hondaautomotiveparts.com/...VIN+Number+---

Whatislove

Good thanks. IN the meantime my ABS light has been staying one when I start the car, not always but happened 4 times yesterday, goes back off when I turn the car off and take out the key...

Targa250R

There's a problem with the ABS system then. If you want to fix it, you'll have to pull the ABS codes and determine what the problem is. You'll need an OBD-II scanner.

Whatislove

That wouldn't be related to the ECL or any other fuse?

Targa250R

ABS is a separate system.

Did this only occur immediately after the oxygen sensor was damaged?

Whatislove

No, this occurred for the first time yesterday. The only related even I can think of is I was braking going over a bridge, hit that rubber separator and my ABS kicked in pretty hard cause of the big bump.

I'll go in and check all the fuses, besides that, how can I check if a relay works?

Targa250R

It's likely got nothing to do with a relay or fuse.

More probable to be a wheel speed sensor or pulser or something.

Whatislove

its very weird. my ABS light just turns on ones in a while randomly and when I turn the car on and off it stays off.

I was looking at the modual and notices that the wire harness going into is has exposed wires. Might be some corrosion. How does that clip disconnect? I cant seem to pry it.

Whatislove

btw, replaced the ELD and it works fine now. found a honda dude who know what he was talking about, apprerntly that ELD works for almost all hondas but for some reason they dont sell em individually on many models.

well, all works great now, abs light aint coming back on either.

pcguru

2001 Civic 2 door. P1298 problem.

It's weird but every Honda parts site I checked says that part 38255-S5A-003 is only for 4 door 01-03 Civics, and they do not have a ELD part # for the 2 door versions.

I don't see why they shouldn't use the same ELD but I notice that the relay box part numbers are different (2 door uses 38250-S5P-A01 while 4 door uses 38250-S5A-A01). Why?