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Anonymous
02/03/26(Tue)20:52:41 No.28831616 Are you ignoring one right now?
Showing all 17 replies.
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Anonymous
02/03/26(Tue)20:59:54 No.28831626 >>28831616
Nah, my car doesn’t have one.
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Anonymous
02/03/26(Tue)21:06:54 No.28831634 >>28831616
Been ignoring it since it came on back in '92.
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Anonymous
02/03/26(Tue)21:09:34 No.28831640 No but I used to drive a Mk4 Golf and that literally always had a CEL.
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Anonymous
02/03/26(Tue)21:09:35 No.28831641 >>28831634
lies
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Anonymous
02/03/26(Tue)21:10:10 No.28831642 >>28831616
It usually works
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Anonymous
02/03/26(Tue)21:19:51 No.28831662 >>28831616
it's come on twice in the last year and went away after i gave 'er the old italian tune up.
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Anonymous
02/04/26(Wed)02:13:22 No.28832001 >mfw P0420
It comes and goes but I need to fix this piece of shit, it's an unclearable code.
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Anonymous
02/04/26(Wed)02:37:02 No.28832024 >>28832001
Just get a defouler already. Takes all of 5 slap one on and be code-free.
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Anonymous
02/04/26(Wed)02:40:15 No.28832032 >>28831616
Bought a 5th gen Explorer cheaper because it had a CE light for catalyst efficiency. Proceeded to ignore the light because no emissions checks around here. It went out.
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Dakota
02/04/26(Wed)02:42:02 No.28832036 >>28831616
no i have some mystery issue that has no code but i just know something aint right
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Anonymous
02/04/26(Wed)02:44:48 No.28832039 >>28832024
This. I have done this going fully catless and it works. Your secondary (post-cat) O2 sensor is just there to check catalyst efficiency, in 99.9% of cars it is not considered by the ECU for anything else and you don't need it. Just move the sensor away from the pipe, badda-bing.
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Anonymous
02/04/26(Wed)02:47:27 No.28832043 >>28832001
Same, mine just went away, I'll wait till winter is over
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Anonymous
02/04/26(Wed)02:53:22 No.28832055 >check engine light comes on
>check engine
>yep its still there
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Anonymous
02/04/26(Wed)03:26:05 No.28832107 >tfw P0456
I've replaced everything that's cheap/easy. I guess next step is dropping the tank or selling the car.
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Anonymous
02/04/26(Wed)03:30:29 No.28832111 >>28832107
You checked the vent valve and charcoal canister?
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Anonymous
02/04/26(Wed)03:41:13 No.28832120 >>28832111
Vent valve, purge valve, new gas cap.
Haven't done charcoal canister because a new one was like $400. Was thinking maybe checking for a cracked hose or fuel pump seal or something but I need to drop the tank for that.
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Anonymous
02/04/26(Wed)03:50:16 No.28832136 The 10 year old battery has given me a low battery warning once, it hasn't appeared again yet
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