Catalytic- converter conversion

[talhagursoy]

Hope you guys doing well,

2 days ago CEL came on and I replaced my spark plugs. Today CEL lights came on back and I just read the codes it says "Catalytic- converter conversion" and "Catalytic- converter conversion 2" numbers "29F4, 29F5" I took my car to the BMW service when light was gone, they check to car and told me that everything was okay and I just had to update my software. However I do not really think these codes come up because of software update. Does anyone have experience about those codes or those kinds of problems ? My 35i has 33k miles on it.
Thank you!

[Tangent]

Don't rule out that a software update could be the true fix. Some years of E46 were overly sensitive to setting catalytic converter efficiency codes and flashing updated software fixed it.

[talhagursoy]

Originally Posted by Tangent

Don't rule out that a software update could be the true fix. Some years of E46 were overly sensitive to setting catalytic converter efficiency codes and flashing updated software fixed it.

After I read your comment, I thought twice and decided going with software update. And It worked, it has been 2 weeks and everything works well. Also car got smoother and steering wheel works better than before. I was surprised what a software could do.

[Dontino]

Originally Posted by talhagursoy

After I read your comment, I thought twice and decided going with software update. And It worked, it has been 2 weeks and everything works well. Also car got smoother and steering wheel works better than before. I was surprised what a software could do.

Hi,
Know this is a old thread but…..
Which software needs to be update?
BR

[bestgooda1]

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[Enzo29]

Originally Posted by Dontino

Hi,
Know this is a old thread but…..
Which software needs to be update?
BR

This is a very old thread now but I am wondering exactly how these catalytic converter efficiency faults were resolved.

I am having the same symptoms with my Z4 and want to rule out other possibilities before having to look for used cats.