P401 egr insufficient flow

**DMitch16** · 02-05-2016,11:22 AM

If the emissions warning light (engine shaped) still comes on I would change the pressure difference sensor. It is the plastic sensor with the 2 rubber hoses connected to it. For your car the part number is 076906051A or 076906051B (chassis number dependent).

It is number 20 on the diagram below.

http://www.jimellisvwparts.com/showA...ssembly=744173

Often one hose is wider than the other making it easy to put on the right way.

**Nasif Khan** · 02-05-2016,03:27 PM

Chassis is WVWZZZ3CZAP00XXX
I've had a look at the part number and searched on ebay. They vary from £10 - £50
Will any do or is it better to get a brand one like Bosch?

**RichardSEL** · 03-05-2016,07:51 AM

Better get the correct one from your VIN from VW dealer spares. Often dealer spares are only a few quid more than aftermarket parts shops which might be selling you an older version -- or one with rice.
At least you'll get the most up to date part number there (revision letter on the end) Mine even gives me a print out of the ETKA diagram -- whether I buy or not.

**DMitch16** · 03-05-2016,09:14 PM

Originally Posted by Nasif Khan

Chassis is WVWZZZ3CZAP00XXX
I've had a look at the part number and searched on ebay. They vary from £10 - £50
Will any do or is it better to get a brand one like Bosch?

A version is for the following chassis numbers
F >> 3C-9E079 136 F >> 3C-9G005 641* F >> 3C-9P044 380*

B version is for following chassis numbers
F 3C-9E079 137>> F 3C-9G005 642>>* F 3C-9P044 381>>*

I would get genuine version or if a bit steep one from a reputable source such as ECP, GSF, Mister-Auto etc. Ebay is a lottery and full of cheap copies (and no free fortune cookie).

**Nasif Khan** · 04-05-2016,08:04 AM

Thanks for that. So which is the one ill need? I'm not sure how to match those numbers to the chassis.

**DMitch16** · 06-05-2016,07:54 PM

Your chassis number is WVWZZZ3CZAP00XXX which is older than the last chassis number for the A version 3C P044 380* so an A version is your part. You can also tell by looking at the existing sensor if it still has the sticker on it but although some parts are superceded with upgraded versions it is not always the highest version letter that would be applicable to your vehicle. As RichardSEL says ask VW which one you should put on.

**Nasif Khan** · 08-05-2016,10:36 AM

Thanks for that mad mitch. I'll be on the phone to them tomorrow.

**Nasif Khan** · 09-05-2016,11:20 PM

VW were not being helpful and didn't want to disclose the part number I needed. Went to ECP and they gave me a bosch DPS with a part number 0281002710.
Will have it fitted tomorrow and hoping it is the right one.