Fault code PO420

[red89mx 0]

Hi Guys

Just had my first check engine light experience and once scanned turns out to be a PO420 Catalyst System Efficiency Below threashold B1 (Assume this is bank 1)

Details

Car: Model ie: E46 330 Motorsport Sedan

Year: 2001

Vin number: WBAAV52090FJ77303

Import / NZ new: Import

Options ie: Auto, std Motorsport fittings

KM: 127,000

Some quick searches on E46 fanatice indicates that this is probably O2 sensors or a cat failing.

Any experience with this? What is the order of diagnosis and rectifying?

If a cat do we need to replace in NZ or can we do without and put a simulator in for the computer?

Had brother in law do the scan and reset check engine light.....but suspect it will come on again and interested in resolving the underlying issue.

[*Glenn* 854]

Some quick searches on E46 fanatice indicates that this is probably O2 sensors or a cat failing.

It could also be an air leak (unmetered air) or the MAF sensor. What scanner did he use ??

You could also give me a call if you like (09) 2722546

[red89mx 0]

Thanks for the time and advice Glenn.

Will sort out a good local BMW specialist down here in Wellywood.

For Welly based members - any reccomendations or is it straight to Jeff Grey

Alan

[_ethrty-Andy_ 2132]

Thanks for the time and advice Glenn.

Will sort out a good local BMW specialist down here in Wellywood.

For Welly based members - any reccomendations or is it straight to Jeff Grey

Alan

Hutt City European are a good option if you are in the Hutt area. i dont know of any late model BMW specialists in Welly itself apart from JGBMW though

[39KiwiTouring 2]

Page European on Kapiti road is another, run the diagnosis feedback and what info you have on hand past them.

Always E46's outside that place though.

Let me know if you can't find the number.

[Wom 0]

Page Euro is good

3828218

or Jono (JK Southern Euro) is a forum sponsor and I'm sure he'd be able to sort you out

http://jksoutherneuro.webs.com/

[kerry 10]

+1 on page european or another is mike page european all top blokes with the no how you need..

[red89mx 0]

Cheers Guys.

The Kapiti option probably better.

Bit confusing having a couple of Page Europeans floating arround.

Brother in law a fully qual mechanic with a number of years working in Switzerland, knows his way arround the BMW's . Will get him to liase with the Kapiti crowd so they are all speaking the same lingo...I will stick to IT.

Alan