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[Engine] 1.6HDi P0104 Anti Pollution Fault
Has anyone else had P0104 on their M59 1.6? The fault is defined as "Mass or Volume Air Flow Circuit Intermittent" there's a thread in the B9 section about it, but are the MAF & turbo are the same on B9 & M59? I can't see any pipes going from the MAF to the Turbo. Maybe it's the wastegate control the post refers to?

I bought the car with this fault and assumed I'd need a new MAF so we agreed a price accordingly. It's been kept clean outside but under the bonnet is a slightly different story, no oil leaks but lots of dust & grime so maybe there's a loose connection somewhere.

Any thoughts appreciated.
I would say the pipe that is being refereed to in the thread is the white pipe that goes from the turbo air intake pipe into the rocker cover oil separator.

My vehicle .... 2006 (m59) Berlingo Multispace Desire - 1.6 HDI 92 
[-] The following 2 users say Thank You to jj9 for this post:
  • cancunia, dumdum
All the 1.6 hdi had a maf fitted in the airbox with a pipe that went straight into the turbo? It’s either not a 1.6hdi or a serious piece of pipe is missing?

It is a diesel hdi 1.6? If so the turbo is at the front and the pipe exits the passenger side of the turbo and into the maf directly which is fitted in the airbox...???
He is referring to the 3” diameter pipe you can’t miss from maf to the turbo, and the white clip is in a pipe which comes off the side of said pipe about an inch on diameter into the rocker cover and wasn’t fitted correctly on his due to broken clips probably, all he’s done is cable tie the little pipe in correctly
Thanks to you both for reading the original post much better than I did! I had at first thought the post was meaning a small pipe or tube rather than the main air intake, but that's the value of asking. The airbox was loose due to the rubber mountings wearing away & that 'small' pipe from the rocker breather had a fair amount of oil & muck at the join.
I've cleaned the breather pipe & stabilised the airbox using some heavy duty rubber fuel pipe where the upper grommets normally go and have ordered a new air filter element so will take another look when the filter arrives. I'll ask Mr Lexia to take a look at it when it's all back together again and see if that's the source of the problem.
Hey, try what I did and blank the egr. Or just pull the plug for a while and try it first. I know it's my first thing on the 1.6 hdi now but mine runs like a dream and I'm more and more convinced that the egr is responsible for a lot of issues from pollution faults to lack of power to high intake temps, bad fuel consumption and lumpy idling. All gone now its blanked. At £3 and half an hours work, it's well worth a try first.
My Van: 2012 B9 1.6 HDi Enterprise 
Yep, the EGR blank is on my list, just waiting for one to arrive. Am I correct in thinking that the EGR is at the back of the engine, low down on the right (battery) side?
I'm also waiting on a used MAF to see if the EML problem goes away for the MOT. Lexia has a slightly different view of the fault saying that there's no connection with the MAF, not just intermittent, the wiring & connections to the ECU all look intact so hopefully the replacement MAF will help.
Just passed my MoT!
The P0104 fault & EML have not been seen since I replaced the MAF back in September. I thought that I'd leave it for a while before updating the thread just to be sure. I've also blanked the EGR, there's a fault code about excess airflow flagged via OBD but no EML so no issue at the MoT.
The Emissions reading was 0.58, I have no idea what that means or if it's good for a 1.6HDi but it passed and that's all that really matters.
well done Smile mine has a code but no mil too after blanking the egr
if its anything like my 1.7cdti the ecu uses the maf signal to assess that if egr was working or not, at idle the maf reading would be 12gms/sec with the egr blanked and 6gms/sec with it unblanked (ie 50% egr and 50% fresh air)
so when blanked the ecu flagged an 0400 egr code and limpmode, the only cure was an egr delete remap or drill holes into the blanking plate, but instead i placed a small piece of masking tape onto the grille in front of the maf so that the reading at idle was reduced to 6gms/sec = no limpmode
Yeah, I think they must all work in a similar way, the ECU expects to see less air via the MAF with the EGR open. My 2.0 HDi was similar, but it lit the EML too.
I like the idea about the masking tape!
[-] The following 1 user says Thank You to cancunia for this post:
  • frank

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