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Home > Main > Scion tC Discussion > CEL: On Then off then on again?

CEL: On Then off then on again?

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redd_boi1108

Reg'd: Sep 18, 2007

Chief Mechanic

Day 1. About four days ago i disconnected my battery so the CEL would go away for a bit.(Didn't want dad to see.) Took her to fill gas up. Everything all good. NO cel

Day 2. drive around a bit that day(43 miles) still didn't get a CEL.

Day 3. Drove around for a bit(25 miles) then CEL came back on. =[ Then drove about another 45miles.

Day 4. Today i woke up. Started the scion and there was no CEL to be seen!!! Reluctant i was, but then i questioned this good fortune. I drove to school with no problems.(14 miles.) Then i drove back home, right wheni pull in my driveway, the CEL comes back on.

WTH is happening!!!! AHHHHHHHHHHHHH!!!!!!!! Someone please, diagnose the situation.

*Yes i do have aftermarket headers and have done the anti-foul with conquer.*


Sky's the Limit
[#] May 15, 2008 12:59pm
flyingcesar

Reg'd: Jun 13, 2006

Scion Guru

The easiest way to find out what CEL code you have is by going to the dealer or to a performance shop or even an autozone. It could be that you have a O2 sensor that crapping out on you.

2008 G37 OB Sport 6MT...
2007 335I 4DR...
[#] May 15, 2008 01:12pm
sicktc06

Reg'd: Aug 17, 2007

Vehicle Designer

Gas Cap?!


A Small Tweak, Makes a Big Difference. Now here! Look close!
http://i97.photobucket.co...6/Scion%20tC/DSC_0158.jpg

Don't follow me... I run into walls.
http://www.myspace.com/sicktc06
[#] May 15, 2008 01:21pm
FrAnkRYzzO

Reg'd: Oct 21, 2005

$upervillain
for Hire

Yeah, get the code and post it up. My guess would also be the O2 sensor. If the heating element is going up, it could be turning on and off throwing the code sporadically. Then again, it could be something completely unrelated.

...............

Donate or one of these adorable kittens WILL DIE!
[#] May 15, 2008 01:21pm
redd_boi1108

Reg'd: Sep 18, 2007

Chief Mechanic

I didn't have time to go to autozone today, so i guess i'll try and go tomorrow. Maybe it won't be p0420. I hate that could... Grr


Sky's the Limit
[#] May 16, 2008 12:11am
Vicious

Reg'd: May 03, 2005

El Chupacabra

What kinda header do you have? I have the exact same problem, but nowadays the CEL doesn't come on as often as it did before.



Y s0 S3ri0uS?
[#] May 16, 2008 02:44am
Web

Reg'd: Apr 17, 2006

THE SHADOW

Vicious wrote:
What kinda header do you have? I have the exact same problem, but nowadays the CEL doesn't come on as often as it did before.



Looks like Megan ceramic coated from the picture. You can barely see the edge of where all 4 runners merge where the primary CAT would be on the stock manifold.

The way you described it, it could be the gas cap. It won't necessarily come on right after you get gas but it will come on while it's setting all the readiness counters. Those are systems that take mileage to reactivate and begin to work properly. B/c you disconnected the battery, sometimes it can take over 100 miles for each system to reset. Tighten your gas cap firmly, then take it to Autozone. If it's an EVAP leak and you haven't touched anything else in the engine, then most likely it's the gas cap. If it's something else, just post it and we'll go from there.


Ignorance is bliss....305 fo life!...haha...Poser
[#] May 16, 2008 09:27am
redd_boi1108

Reg'd: Sep 18, 2007

Chief Mechanic

Thanks people, i am about to leave to autozone right now. I'll get y'all the results in a little.


Sky's the Limit
[#] May 16, 2008 02:27pm
FrAnkRYzzO

Reg'd: Oct 21, 2005

$upervillain
for Hire

Once you get the code you can look it up here:

http://www.clubsciontc.co...CEL-means--Big-List-.html

...............

Donate or one of these adorable kittens WILL DIE!
[#] May 16, 2008 02:41pm
redd_boi1108

Reg'd: Sep 18, 2007

Chief Mechanic

Sorry, i've been busy with school things this weekend. I got the

[b]P0420- Low Catalyst Efficiency.

So what i did was add another anti-foul to my s-pipe. So i have a total of three now. Has anyone had success with the megan headers and no cel? I hope this works out for me, otherwise, i might have to put the stock headers on.


Sky's the Limit
[#] May 19, 2008 02:43pm
FrAnkRYzzO

Reg'd: Oct 21, 2005

$upervillain
for Hire

Has adding the 3rd antifouler helped?

...............

Donate or one of these adorable kittens WILL DIE!
[#] May 19, 2008 02:52pm
redd_boi1108

Reg'd: Sep 18, 2007

Chief Mechanic

I've only driven around about 15-17 miles so far so good. But it's too early to tell. When it hits a 100 miles w/ no CEL, then we start poppin bottles!!! Lmao


Sky's the Limit
[#] May 19, 2008 04:23pm
flyingcesar

Reg'd: Jun 13, 2006

Scion Guru

Hope it works...

2008 G37 OB Sport 6MT...
2007 335I 4DR...
[#] May 20, 2008 07:31pm
redd_boi1108

Reg'd: Sep 18, 2007

Chief Mechanic

It's up to 59 miles now. So far, so good. *crosses fingers*


Sky's the Limit
[#] May 20, 2008 10:23pm
Vicious

Reg'd: May 03, 2005

El Chupacabra

Keep me posted man, I've been wondering if adding another anti-fouler to mine would fix the problem



Y s0 S3ri0uS?
[#] May 22, 2008 07:24am
redd_boi1108

Reg'd: Sep 18, 2007

Chief Mechanic

Im almost at 80 now. I bang gears the yesterday to, just to see if it would come on, But it didn't. No problems at all. Im still waiting to hit 100 miles so i can celebrate. Lmao


Sky's the Limit
[#] May 22, 2008 12:09pm
redd_boi1108

Reg'd: Sep 18, 2007

Chief Mechanic

Time to pop bottles fellas! I hit 105 miles today and no CEL!!! WOoot Woot!!! Yeah! Time to party! Everything is all good!

I guess three anti-foul's work for the megan headers! Awesome!


Sky's the Limit
[#] May 22, 2008 04:24pm
Prey2k8

Reg'd: May 27, 2008

Detailer

where can i get a anti fouler to see if my check engine light turns off? im runnin dc headers

[#] Jun 02, 2008 04:11pm
redd_boi1108

Reg'd: Sep 18, 2007

Chief Mechanic

18mm Anti-Foul Help! Part# 42002

You can get this at any autoparts store.

You drill about an half-inch hole in one anti-foul. After that is done, take the drilled one and screw it on top of the normal one. Then take the o2 sensor off the s-pipe. Screw in the anti-fouls into the s-pipe, and then put the o2 sensor on the anti-fouls.

I hear that DC sports header only need to anti-fouls. As for megan, like mine, i used three. =]




Sky's the Limit
[#] Jun 02, 2008 04:27pm
Prey2k8

Reg'd: May 27, 2008

Detailer

so dc needs 2 anti fouls one on the header and other on the stock s pipe?

[#] Jun 02, 2008 04:29pm
Vicious

Reg'd: May 03, 2005

El Chupacabra

Awesome, looks like I'll be ordering another anti-fouler



Y s0 S3ri0uS?
[#] Jun 02, 2008 04:40pm
redd_boi1108

Reg'd: Sep 18, 2007

Chief Mechanic

Prey2k8- You need both of them on the s-pipe. DO NOT Put an antifoul on the header!

Vicious- I've driven almost 600miles and no cel!!! Muahaha! Lmao


Sky's the Limit
[#] Jun 02, 2008 04:52pm
trdmaster

Reg'd: May 28, 2008

Detailer

you can get a CEL code reader from walmart, auto zone, pep boys, or any other auto shop real cheap, those things are like $40-$100 depending on what kind u get

-=RS2 Scion XtC=-

I drink gasoline and fart carbon monoxide.
[#] Jun 02, 2008 04:59pm
Prey2k8

Reg'd: May 27, 2008

Detailer

ok got u. so the anti fouler's r gonne be stacked on top of one another and the sensor on top of them?

[#] Jun 02, 2008 05:00pm
Vicious

Reg'd: May 03, 2005

El Chupacabra

^Thanks for the info.



Y s0 S3ri0uS?
[#] Jun 02, 2008 05:01pm
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