[Ghostn54]

I just installed catless downpipes and now these codes are popping up could the O2 sensors be bad possibly now or is it from being Catless? Has anyone ever seen this code before?

[Ghostn54]

Originally Posted by Ghostn54

I just installed catless downpipes and now these codes are popping up could the O2 sensors be bad possibly now or is it from being Catless? Has anyone ever seen this code before?

This is the code on mhd it should be taking the sel off.

[IllSic_Design]

No, with catless dp's you'll have shadow codes of;
29F4 DME: Catalytic-converter conversion
29F5 DME: Catalytic-converter conversion 2.

Those codes you have are from a different issue. Did you damage the wiring on the o2's when installing the DP's? I would double check all the wiring and make sure you didnt damage anything.

Edit: Did you install a tune after putting on the down pipes?

[Ghostn54]

Originally Posted by IllSic_Design

No, with catless dp's you'll have shadow codes of;
29F4 DME: Catalytic-converter conversion
29F5 DME: Catalytic-converter conversion 2.

Those codes you have are from a different issue. Did you damage the wiring on the o2's when installing the DP's? I would double check all the wiring and make sure you didnt damage anything.

Edit: Did you install a tune after putting on the down pipes?

No I had mhd before, I just changed the oem/catted dp and unmarked it now. Wiring should be good. Any other ideas as well?

[IllSic_Design]

I find it weird that you have a tune on there but not showing shadow codes for the catless dp's.

It's highly unlikely that both sensors went out during your DP change, so it has to be wiring or something else simple like that.

[Ghostn54]

Originally Posted by IllSic_Design

I find it weird that you have a tune on there but not showing shadow codes for the catless dp's.

It's highly unlikely that both sensors went out during your DP change, so it has to be wiring or something else simple like that.

True, I was reading and some people said it was a fuse and the sensors are grounding out

[Ghostn54]

Update: so the fuse in the glove box was blown, replaced the fuse, blew right away again, any ideas of what this could be. I been reading the vent heaters? Any ideas are appreciated

[Emilime75]

The fused circuit is what provides power to the O2 sensors for the pre-heating element. If it pops right away, that wiring is likely shorted to ground somewhere, i.e., what IllSic said, above. It's unlikely they both failed in the same way, at the same time, coincidentally while you were messing with them. Go through everything and make sure none of the wiring is damaged or pinched somewhere, and that they're all plugged into the right places - it's possible you got them mixed up.

[Ghostn54]

Solved, crimped o2 wire between vcg and block. Runs great now

[mweisdorfer]

If the o2 sensors are over 100,000 miles old, putting catless down pipes can cause issues with them.

You can try and reset them in MHD. My guess is that you'll be forking out $350-400.00 for 4 new ones