topic Re: EF 24-70mm f/2.8L II USM Error 01 Message in EF & RF Lenses

EF 24-70mm f/2.8L II USM Error 01 Message

Curamantel — Sun, 16 Feb 2025 20:46:27 GMT

Hello All,

My EF 24-70mm f/2.8L II suddenly started having this Err 01 with my Canon 5D MkII and my 40D as well. Other lenses work well on these two bodies. It works at 2.8; but any higher, I get the Error. I have cleaned the contacts.

I see that others were having this problem as well. My lens is about 11-12 years old now. Thoughts on how to get this fixed? Can I take it to a local repair shop if any? Or should this go to Canon?

Thanks!

Re: EF 24-70mm f/2.8L II USM Error 01 Message

jrhoffman75 — Mon, 17 Feb 2025 15:02:14 GMT

@Curamantel wrote:

Hello All,

My EF 24-70mm f/2.8L II suddenly started having this Err 01 with my Canon 5D MkII and my 40D as well. Other lenses work well on these two bodies. It works at 2.8; but any higher, I get the Error. I have cleaned the contacts.

I see that others were having this problem as well. My lens is about 11-12 years old now. Thoughts on how to get this fixed? Can I take it to a local repair shop if any? Or should this go to Canon?

Thanks!

That lens is known for ribbon cable failures that present the problem you are seeing. I don't believe Can repairs that lens any more.

Re: EF 24-70mm f/2.8L II USM Error 01 Message

ebiggs1 — Mon, 17 Feb 2025 15:05:41 GMT

Try this tel:+1-800-652-2666 and ask one of the techs

Re: EF 24-70mm f/2.8L II USM Error 01 Message

Curamantel — Fri, 06 Mar 2026 16:19:43 GMT

Hello All, thanks for your help! I sent this to Canon in Virginia and it came back repaired! So far working well!!