Would no Cat. in exhaust cause CEL to stay on?
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Would no Cat. in exhaust cause CEL to stay on?
I thought my check engine light would have gone off when I put my new o2 sensor in but it didnt. I was just wondering if no cat would cause it to stay on before i go rippin apart ECU.
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From: Atlanta
Re: Would no Cat. in exhaust cause CEL to stay on? (EJ1Racing.tk)
If you are obd2 then your ECU is looking at the 2nd O2 sensor to see if your cat. is still efficient.If you dont have a cat. then the O2 sensor wont send the right signal to the ECU and thus give you a code.
What code are you getting? Catalyst efficiency below threshold?
What code are you getting? Catalyst efficiency below threshold?
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piotrush
Honda Prelude
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Feb 9, 2004 09:51 PM
