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Old 09-06-2012, 10:31 AM   #1
klaus_b2
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Default CEL wont clear? thoughts?

ok well heres my situation. i have a 2.5i and i have the borla headers, hfc, catback. and i dont have my o2 sensors in because they just wont reach. ive tried to clear it with the accessport but it just clears the codes that read on the ap but it wont clear my cel. or i might be stupid and its just supposed to clear the codes and not make the cel go away?
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Old 09-06-2012, 11:09 AM   #2
Cobb Tuning
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Quote:
Originally Posted by klaus_b2 View Post
ok well heres my situation. i have a 2.5i and i have the borla headers, hfc, catback. and i dont have my o2 sensors in because they just wont reach. ive tried to clear it with the accessport but it just clears the codes that read on the ap but it wont clear my cel. or i might be stupid and its just supposed to clear the codes and not make the cel go away?
Codes will keep coming back when they are based on a current perceived failure no matter how many times you clear them via the AccessPORT. You will need to either address the failure (figure out a way to re-install the o2 sensors) or disable the DTC(s) via the AccessTUNER software. For the latter, you can request a free copy of the software here (for v2 AccessPORT users):
http://www.cobbtuning.com/accesstune...st-s/70716.htm

There is a tutorial located at the following link that describes how to disable DTCs. Keep in mind that this may only be legal to do for racing applications:
https://forums.cobbtuning.com/forums...-Race-software

Bill
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Old 09-06-2012, 11:11 AM   #3
wrxlaunch
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99 SF

Default

Quote:
Originally Posted by klaus_b2
ok well heres my situation. i have a 2.5i and i have the borla headers, hfc, catback. and i dont have my o2 sensors in because they just wont reach. ive tried to clear it with the accessport but it just clears the codes that read on the ap but it wont clear my cel. or i might be stupid and its just supposed to clear the codes and not make the cel go away?
You are just stupid to think clearing a code and leaving the sensors unplugged will disable a cel...
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Old 09-06-2012, 11:33 AM   #4
Jessekrs123
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1993 Legacy Sedan
1984 BRAT

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Your o2 sensors are essential to keep your engine running the way it should. Without them, your car will always be in a fail safe mode and will not run properly if it is unable to measure the actual fuel trim and the efficiency of your cats.

You should have taken this into consideration before you did a mod like this. I wouldn't drive the car at all without the o2 sensors plugged in. The CEL will ALWAYS be on if they are unplugged, and simply disabling the CEL as Cobb said is just a bandaid. It's like putting black tape over the light itself. You can't see the light, but the problem still exists which is idiotic, especially when it comes to a problem which is an essential part of keeping your engine running well.

Park your car until you figure out a way to hook everything up. If you are electrical savvy, just extend the wires for the connector using some solder, heat shrink, and electrical tape. You can de-pin the plug itself if that makes things easier.
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Old 09-06-2012, 11:58 AM   #5
Cobb Tuning
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Quote:
Originally Posted by Jessekrs123 View Post
Your o2 sensors are essential to keep your engine running the way it should. Without them, your car will always be in a fail safe mode and will not run properly if it is unable to measure the actual fuel trim and the efficiency of your cats.

You should have taken this into consideration before you did a mod like this. I wouldn't drive the car at all without the o2 sensors plugged in. The CEL will ALWAYS be on if they are unplugged, and simply disabling the CEL as Cobb said is just a bandaid. It's like putting black tape over the light itself. You can't see the light, but the problem still exists which is idiotic, especially when it comes to a problem which is an essential part of keeping your engine running well.
I should have mentioned that we don't recommend disabling any CEL related to the front o2 sensor, except possibly with specific racing applications (there are ways to force open loop all the time by manipulating the tune in those cases). Rear o2 is a less of a concern, but can still cause closed loop fueling issues on the 2.5L cars even with the DTC disabled (this problem can be eliminated via certain tuning steps for the 2.5L turbo cars but that capability is not available on the NA Impreza software which is no longer supported).

Bill
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Old 09-08-2012, 11:57 PM   #6
klaus_b2
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thanks. and i know im not going to be running with out my o2s for a while...its only til next tuesday when i can have my exhaust shop fit me in to extend my wires for me
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