Allright so I had the street header in for about 2 months and now about a week later my post cat o2 sensor trips a code. Everything went well together Checked and rechecked everything. I have a feeling that when I take it to the stealership they are gonna say that my BAAD A$$ RMW street header caused the o2 senser to crap the bed. Jan does great work and he wouldn't put stuff out that would gobble up 02 sensors. So Could a more efficient header and higher flowing cat eat an o2 senser in 2 weeks? Or is this a faulty part right from the factory/ My other question is if I could run o2 simulators, if so when can I go and click and buy them.............as long as it isn't from Palo Uber. Hey thanks in advance guys

 

Check your wiring for breaks and shorts.

 

what exactly was the code ?

 

Bingo Nat.

The lazy way to remove or install a o2 is not to disconnect the plug. Problem with this is it puts strain on the wires and can cause problems. Not saying this was done on your install but check it just in case.

Longboard

 

see pm

 

I have the same code. With RMW shorty. I've had the shorty on for about 3-4months.

I am in the process of finding a replacement sensor, and will then change it.

I just hit 40k when the light came on.

Hoping that the sensor was at the end of it's life...

Can does drive fine with the warning light.

 

the guys at my BMW performance workshop seem to think that with any hiflow cat, the rear 02 sensor needs to be desensitized, by installing a new map/program. Maybe that is something that is done in Jan's tune? They were trying to push me into buying MTH software, which i'm not keen on.

 

another option is to run a o2 simulator. they make them for the mini. my old jeep use to eat o2 sensors .... i replaced one with the simulator and all was fine for years.
i run one in my mini as well.

 

You will have problems too if the wires weren't run under the heatshield

 

Where is the best place to get an 02 sim? For future reference.

Also, when you plug in the new sensor, does the light go away? or does it need to be cleared?

 

Sounds like BS - I am running a 120CPSI high flow cat on my GTT header and I have never thrown a code.

Have you reset the code and it continually comes back?

 

Try http://www.o2simulator.com/
I think mini-madness sell them also

The code will probably have to be cleared, I don't think it will go away...

 

did I miss where someone posted what the exact code is ?

 

My guess is he threw a 2270, which is when the post-cat sensor does not detect enough of a temperature differential with the pre-cat sensor. I used to run an o2 sensor from the linked company, and it worked fine. However, don't think you can --replace--the sensor with the simulator. You must still have the sensor in the circuit as there's a heater circuit and a sensor circuit (4 wires) and the simulator replaces the sensor circuit but you will still get a code if the heater circuit is broken. I simply left the sensor in the bung, but it wasn't sending anything to the computer, the simulator was. Recently I got an RMW tune and it started throwing 2270s with the same set up as before that didn't throw codes. I replaced the sensor and removed the simulator, and (touch wood) there's been no codes since (maybe 600 miles).
Personally, I don't think Jan's tune is causing problems, and I'd guess the sensor is bad. However, it's cheaper to buy the simulator and use the existing sensor than to replace the sensor (about half the price I think.)
..and the code will not reset itself, you need to clear it.

 

You shouldn't need an O2 simulator with the street header. As others have stated, check to make sure the wiring is not twisted or abraded. Clear the code and drive your car as you usually do in order to see if the code comes back. If it does, you may need a new O2 sensor. You may also want to contact Jan.

 

I know that with any high flow cat (depending on cell rating of course) there is always a possibilty of eating an O2 sensor. I see it all the time over on the BMW side of the house and I was going through them like butter with my 600HP 5.0GT running a 200 cel cat.

 

I know my own Mini keeps throwing P0420s at me now... but only when lugging the engine in 6th gear... the snapshots show 70-74mph and 2200-2400 rpm when it captures the P0420.

My own thoughts are that at such a low RPM I'm not keeping the cat warm enough, and the system is saying "hey, the O2 sensors aren't different enough" and codes.

That's what I get for trying to use 6th gear on the Mini now, with the new power... I'd never be in 6th that low (70mph) prior to the upgrades.

 

All the wiring is fine, I had the code cleared, it was saying rear sensor not operating at optimum level or something... Started with a 4. The code came back about a week later...when on Hwy at about 3000rpm in 6th...

I've been in contact with Jan - he's been helpful. I have a replacement sensor on the way too.

We'll see what happens

 

Yeah thought so....just another way to push MTH software...

When in contact with Jan, he also stated the remote tuning option isn't far off... For those of us OS.

 

Cool

 

I have the same exact issue. Only comes on being on the hwy cruising in 6th. I haven't had time yet to check if the wires or the O2 sensor is bad.

 

so have we determined yet what the op's code was ? PO420, PO136,PO2096 ?
none of the above ?
Have we tried swapping the o2 sensors and see if the codes follow a faulty sensor ?

 

I will be swapping the sensors to see if I get a diffrent code reading. If so, then it will point out to a bad o2 sensor after the cat. I will try to do this sometime this week after the rain stops.

 

there we go, atleast one person is going to use a systematic approach to fixing this. Let us know what happens COOUUPER S.

 

Mini Joe is alive? WTF