561design

Any tips on how to do this? I've driven 200 miles in the Hope's of turning the o2 sensor back on after clearing a set of codes and no luck. I've checked Google and there are various methods that are timely because they require multiple cold ignition starts.

chrisridebike8

Do you have a tune? 200 miles is too long

561design

Yes, eurocharged tune. I had been driving the car with no problem for years. The car had accumulated some codes from the build and I had them cleared up last week. The only thing I can assume is that I need more cold cycle starts as I accumulated the 200 miles on one road trip. I've only cold started the car and got it up to temp a handful of times.

Jasonoff

The secondary O2 sensors are likely disabled. When I reload OEM all it takes is about 3km of driving to set the readiness monitors.

561design

Strange, a few years ago I did an emissions inspection and everything went thru fine.

You mean the o2 sensors after the primary cat? There's no o2 sensors on the secondary cat.

roadkillrob

You may have been fine last time as your state allows one not ready, so if the 02 was not ready but everything else was it would have passed fine.

If it is turned off in the tune, from what I recall from when I had a eurocharged tune, they also turned off the 02 heater monitor, so you always had 2 not ready - do you have anything else still not ready or just the one?

561design

Thanks Rob, Jerry just got back to me and told me on the V7 the O2's are disabled. I have V5, but I'm assuming this is the case as well. Looks like I'll flash it back to stock and then put the tune back on.

Cheers!

Jasonoff

Primary O2 = before primary cat.
Secondary O2 = before secondary cat (which is after the primary).

561design

Thanks for clarification