[Jalumi69]

Hello,

I have a 2012 528i (not X-Drive) 110K miles. I am getting the above mentioned error. I had a HPFP go out on me and upgraded to the new design. I am not sure if this is what is causing the error or just a coincidence.

I have replaced both Oxygen Sensors and always using 93 gas. The check engine light comes on and off. I am using Ista for scanning, no other codes comes up. I don't want to spend 1K+ only to find that I replaced the wrong part.

Please help!

Thanking you all in advance.

[Trian]

What's the time between HPFP change and first error?

[ezaircon4jc]

Hate to suggest this but, bad catalytic converter? I know that's a long shot as converters rarely go bad, unless you're running rich and burn out the element.

[Jalumi69]

Originally Posted by Trian

What's the time between HPFP change and first error?

Thanks for your reply. I would say about a month after.

[Jalumi69]

Originally Posted by ezaircon4jc

Hate to suggest this but, bad catalytic converter? I know that's a long shot as converters rarely go bad, unless you're running rich and burn out the element.

Thank you for your reply.

How will I know if my car is running rich if I don't have any other codes?

[abraarukuk]

catalytic convertor not go bad easily mate

[Jalumi69]

I did replace ignition coils and spark plugs

[Jalumi69]

Originally Posted by abraarukuk

catalytic convertor not go bad easily mate

Thanks!

[Jalumi69]

Hello,

I replaced the catalytic converter with used one. The light went off. Scanned with Ista D, no error code.

I would like to thank you all.

[ChiltiCoatl89]

Yes, we are a tight and respectful community, this is my social media lol. I truly enjoy everyone here, everyone shares knowledge and is respectful, count on us to help with as much as we can for our 5ers!!! Very surprised it was your Cat that was bad!!!

[Hoa]

BMW recommend cleaning the catalytic converter first if the monolith is not damaged. I performed this recently and error went away. To avoid risk of damage, I only use a garden hose and it went well. Attached is a file form TIS

[Jalumi69]

Originally Posted by ChiltiCoatl89

Yes, we are a tight and respectful community, this is my social media lol. I truly enjoy everyone here, everyone shares knowledge and is respectful, count on us to help with as much as we can for our 5ers!!! Very surprised it was your Cat that was bad!!!

I agree with you. Even though I don't post much here, but I have learned a lot from this community. People in this community are always willing to help.

Thank you.

[Jalumi69]

Originally Posted by Hoa

BMW recommend cleaning the catalytic converter first if the monolith is not damaged. I performed this recently and error went away. To avoid risk of damage, I only use a garden hose and it went well. Attached is a file form TIS

Thank you for sharing the PDF file.

I used Cataclean and it did turn the CEL off for sometime (a month maybe) then the light came back on. I did soak it in dishwasher soap for 2-3 days and rinsed it with a water hose, this didn't help.

I wish I saw this cleaning procedure before getting one. I surely would've tried. Maybe I will one day as I still have the bad catalytic converter and a pressure washer.

Thanks again.