Subject	It won't throw codes with aftermarket exhaust.
Posted by	Sleeper_TTZ(SeKy) on April 06, 2022 at 6:50 PM
	This message has been viewed 153 times.
In Reply To	Codes posted by TTwinTTurboZ on April 05, 2022 at 09:38 PM
Message	Your thinking of an OBD 2 system. OBD2 has two sensors, one up stream and one down. They take readings pre-Cat and Post- Cat. Then within the set parameters adjust ratios and also determine the operational status of the catalytic material. Most Z32's are OBD1. Only one O2 Sensor per a side and only on the Up-stream side. Meaning they only detect the gases coming out of the engine. Not past the convertor. So it won't trigger a check engine light because there isn't another sensor to read post flow and the ECU isn't programed to determine the operability of the cats.
Follow Ups	Exhaust questions - TTwinTTurboZ 18:22:24 04/05/22 Codes - TTwinTTurboZ 21:38:26 04/05/22 Re: Codes - itsa300zx 11:00:04 04/06/22 Clarification - TTwinTTurboZ 18:56:02 04/06/22 As long as you install and plug in your O2 sensors, - Woodnutz (PA) 11:38:01 04/06/22 It won't throw codes with aftermarket exhaust. - Sleeper_TTZ(SeKy) 18:50:40 04/06/22 However you still need to have the O2 sensors installed. - Sleeper_TTZ(SeKy) 18:52:14 04/06/22 Ahhhh - TTwinTTurboZ 18:56:53 04/06/22 For your "test" pipes, they're not test pipes, unless the - Woodnutz (PA) 11:50:43 04/06/22 For sure - TTwinTTurboZ 18:57:24 04/06/22 Gutted cars and smell - Mike@ZSpeed 07:01:30 04/07/22 #^*}# auto spell check. * see above (n/m) - Mike@ZSpeed 07:02:21 04/07/22 Re: Gutted cars and smell - TTwinTTurboZ 07:53:50 04/07/22
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