I recently got my exhaust redone without the cat. I know that I should be getting a CEL for the lack of second sensor. I am throwing multiple codes on a crusty scanner. I was just wondering what code should be thrown. I have 2 different o2 sensor codes and I am a little confused.
when mine was off i used to get p0420 on my scanner, but no worries about that now with a new hi-flow one.
wow thats weird. I'm getting p0130 and p0141
It's normal to get 2 codes when the second 02 sensor goes out. Revoving it looks pretty much the same to the computer as if it where bad/broken. One code should be a system interupt code and the other should be a out of range code if I remember right. Usually if any sensor goes out on an OBD2 car, the ecu ends up throwing at least 2 codes if not more for the same thing.
Im using an rk o2 sim without any problems. I have a cat still, but theres no rear o2 bung so I have the sim. Soon Ill be redoing my entire exhaust(again) lol, with stans header,12" test pipe res, 2.5" piping from customtubes,and a greddy ti muffler...its gona be loud as hell lol. Ill prolly end up getting something like a 24" glasspack or something to quiet it down.
Im using the o2 sim for now and when I redo it with no cat, but hopefully Ill be getting a tune using hptuners sometime soon so Ill just delete the rear code. The guy I got the o2 sim from used it for a few years with no problems though.
P0130 - O2 Sensor Circuit Malfunction, Bank 1 Sensor 1 (sensor before the cat)
P0141 - O2 Sensor Heater Circuit Malfunction, Bank 1 Sensor 2 (sensor after the cat)
Basically that means that both sensors are shot so you just have to replace them both. Since you don't have a cat, you may throw these codes after you replace the sensors:
P0420 - Catalyst System Efficiency Below Threshold (Bank 1)
P0422 - Main Catalyst Efficiency Below Threshold (Bank 1)
If you install a high flow cat you won't throw any inefficiency codes. If you got rid of your second O2 sensor all together, you'll probably throw this code:
P0140 - O2 Sensor Circuit No Activity Detected (Bank 1 Sensor 2)
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450WHP Turbo Ecotec swap in the works...
thanks man. I appreciate it.
can you jumper the o2 sensor to fool the computer? for non cat exaust??
"Z24 Dustbunny"
so im going to cut my cat out today... and straight pipe it.. so i dont need to tap my o2 sensor in? b/c it will throw a code anyway?
"Z24 Dustbunny"
