[e90,325d,09] intermittent power after service

[Porkyboy]

Hi my car is having an intermittent power issue when applying gas, its almost like the turbo isn't always kicking in fully. I had it serviced on the 25/11 and it has only been happening since then. The check engine light just popped up and with my bluetooth obd scanner i get this code = "P3264"
my app says its mass air flow meter. does anyone have more info here ? the cars new to me, as i only bought it 2 months ago

tldr
"P3264" engine code

[stevemcs]

Did they change the air filter ? is everything connected up correctly - ie, no airleaks ?

[thatdude]

The first thing to do is to go back to where it was serviced and ask them to look over it. It might be something small and simple that was overlooked (it happens, we're all human) and can be corrected very quickly at no extra cost (or dirty hands!) to you.

[Porkyboy]

Hi, i just took it back to the garage that did the service and they checked it over and the read the codes with there scanners.

Here are the codes

4212 - glow plug cylinder 1 activation
4232 - glow plug cylinder 3 activation
4242 - glow plug cylinder 4 activation
4252 - glow plug cylinder 5 activation
480a - particulate filter system (garage said they didn't know what this was)
3f35 - Charge air turbo monitoring
3ff1 - air mass flow sensor

The garage said the glow plugs are likely not a problem and if cleared they probably wouldn't show back up, but as i just bought the car on the 7th of october i called my dealership and they booked me in to get it looked at monday.
Do any of these codes looks bad to you guys ? i looked at the 480a and it seems be related to the dpf potentially blocked up which looks to be expensive repair
Should i just try to refund the car or hold on

[helix402]

You need a better garage if they don’t know what a DPF is! It sounds like they do not have the ability to diagnose the cause of your problem.

[Porkyboy]

Well they just did a quick scan for free and it didn't say dpf on there screen so i think it's okay

[helix402]

Porkyboy said:

Well they just did a quick scan for free and it didn't say dpf on there screen so i think it's okay

Particulate filter system=Dpf.

[stevemcs]

So given there is a fault code for the maf and it may have been disturbed by the service that’s where I would be looking, have they cleared the codes driven it and then rescanned to see what has returned ?

[Elliot2000]

480a is blocked dpf as others mentioned

3ff1 is basically the amount of air measured by the air mass meter is not correct compared to the amount the ecu has calculated it should see - normally if an egr is stuck open or closed, or blocked air filter, or air leak etc, or even a blocked dpf!

If the dpf is blocked then that will reduce the amount the turbo can boost as the exhaust gases are not flowing freely


Did the use dpf compatible low ash oil during the service?

[Porkyboy]

Hi all, thanks for the answers I've been meaning to reply but this site keeps locking me from replying due to being a new member :/.

I think you are right about the dpf being blocked elliot. I was driving for around 40 mins (slow moving traffic not motorway) Wednesday after filling the tank and the check engine light went out and the car felt back to normal.
But the light did come back on Thursday sadly
After looking around, I'm gonna take it for a drive on the motorway tonight when it's clear. I'll post again once I've done this

[330ti]

DPF will not do a regen with fault codes present. Might be glow plug controller with those fault codes ??

[Porkyboy]

Just to update you all, the motorway trip didn't do anything as engine light was on :-(

I have just came back from the garage and they said the dpf is blocked and needs cleaning/regenerating, they will replace the glow plugs, glow plug controller and also the egr valve. they said this should fix it but they have a suspicion that the turbo may need replacing depending how we get on afterwards.

[helix402]

Get the thermostats checked too.

[stevemcs]

A dpf will rarely block all on its own, you need to get to the bottom of what’s causing it otherwise the same thing will happen again.

Start by getting the codes, clear them and run it, see what returns and go from there. Go genuine on the egr valve.

[helix402]

stevemcs said:

A dpf will rarely block all on its own, you need to get to the bottom of what’s causing it otherwise the same thing will happen again.

Start by getting the codes, clear them and run it, see what returns and go from there. Go genuine on the egr valve.

Wise words, faulty thermostats don’t give codes on the diesels. You need to monitor the coolant temp.

[stevemcs]

We have one in today with a blocked DPF, a few codes in there but all with the exception of glowplug 3 has come back. DPF is trying to regen ans thinks its reging but isn't ....