[wrrush]

im throwing a 2aa0 camshaft sensor inlet signla and a 3100 boost pressure control deactivation

i have purchased two cam shaft sensors from fcp euro, i have switched the vanos solenoids and cleaned the vanos with air as well as cleaned the cam shaft sensor wires with air

the sensors are flush and tight.

i am scanning with mhd

it used to say there was a synchronization problem before i put the new camshaft sensor back in. i have been through all the DIYs and am scared it is the camshaft ledge

can is a 2007 335xi with about 150k miles on it.

I just replaced the turbos, the valve cover gasket, the inlets, outlets, fmic, charge pipe, dci, vacuum lines, lower charge pipe, added a oil cooler, added a trans cooler, flashed it with mhd then flashed back to stock, have upgraded r8 coils, and ngk spark plugs that are gapped correctly.

I have already dropped a ton of money into this and time and do not want to dive into a cam ledge replacement right now.

Anyone have this same problem??

[dpaul]

The chronology of events is unclear from your description

Are you saying you had a CEL then observed 2aa0 and 3100 code, then replaced both intake and exhaust sensors, still had those codes, then swapped VANOS solenoids and still had those codes?

Or are you saying there was a "synchronization" code at first and but then, after replacing a sensor, it changed to 2aa0/3100? What exactly was that "synchronization" code?

Edit: a simple thing to check is if the center part of the oil filter cap is in place. They break off and are sometimes discarded by incompetent service personnel during filter change. That will give you low oil pressure that can cause VANOS related codes. You might also want to check the wires from the camshaft sensor for continuity back to the DME

[wrrush]

had 2a9e and replaced sensor and that was gone but the 3100 and the 2aa0 were still present.

just checked the center part of the oil cap it is still there with the new green ring. oil was actually running out the top of the filter housing with the new thermostat delete i have down to the oil cooler, so def not low

the wires are running 4.4v and 11. something volts i cant remember how high

just put in a new battery too yesterday

- DME active codes -
2AA0 - DME: Camshaft sensor, inlet, signal.
3100 - DME: Boost-pressure control, deactivation.

- Misc. information -
MHD build: version 1.91
Voltage 11.98V
Last flashed file : Stg0
VIN: WBAVD53517A008625
CAS VIN: WBAVD53517A008625
Factory software: 7575914
Current software: 7626262
ECU status: Normal operation

- Readiness -
Misfire: Complete.
Fuel System: Complete.
Components: Complete.
Catalyst: INCOMPLETE.
Heated Catalyst: Not avail.
Evaporative System: INCOMPLETE.
Secondary Air System: Not avail.
A/C Refrigerant: Not avail.
Oxygen Sensor: INCOMPLETE.
Oxygen Sensor Heater: INCOMPLETE.
EGR System: Not avail.

thats from MHD

[dpaul]

OK, so you are saying:

1) the wiring is OK (which I could not tell from your description)
2) the sensor is new
3) the VANOS solenoids were ruled out by swapping
4) low oil pressure fault from oil cap issue unlikely

There are other explanations for oil pressure related VANOS problems including the cam ledges and VANOS filters/check valves. However, that seems unlikely because 2a9e and 2aa0 are not the typical codes accompanying problems in those areas.

That leaves a possible damaged VANOS adjusting unit - the thing attached to the camshaft. Fits very well with 2a9e code. There are a number of posts detailing adjusting unit failures on N52 engines. However, I can't recall any for the N54, which uses a different unit.

You can use INPA to interrogate the VANOS signals in real time. That may provide useful clues for diagnosis

Here's a link to a wiring diagram relating to the position sensors. What voltage do you see on what pin under what condition? Obviously there ought to be 13.8-14.5 on the red wire when the engine is running or 12.6 when ignition is on. Blue/blk should be ground. Yellow is the signal wire.
https://www.newtis.info/tisv2/a/en/e...e-gear/xCYjJP2

[wrrush]

Wires are ok, unfortunately.

Dont have INPA to dive in further, where can i get one in english??

[wrrush]

Where are the vanos filters located on a 2007 e90 n54 335xi. On the videos i found it looks near the Y section of my vrsf outlet but i cant see any bolts

[dpaul]

Originally Posted by wrrush

Wires are ok, unfortunately.

Dont have INPA to dive in further, where can i get one in english??

All versions of INPA are at least partly in German. It's not that difficult.
https://www.bimmergeeks.net/downloads

[dpaul]

Originally Posted by wrrush

Where are the vanos filters located on a 2007 e90 n54 335xi. On the videos i found it looks near the Y section of my vrsf outlet but i cant see any bolts

Exhaust side of the cylinder head near the front
https://www.realoem.com/bmw/enUS/sho...diagId=11_3966
#11 - "non-return valve"

[wrrush]

thats whats been throwing me off, the videos online show two of them and i only have one, dam thats a right fit with aftermarket outlets

[dpaul]

Originally Posted by wrrush

thats whats been throwing me off, the videos online show two of them and i only have one, dam thats a right fit with aftermarket outlets

There are two

[wrrush]

really bc on the diagram and looking at my car i can only find one

[dpaul]

Yes, really two. Notice the quantity indicated in the diagram part list is 2
Be sure you are not confusing with cam chain tensioner bolt

[wrrush]

i was looking at the cam chain tension-er. dam those bolts are a pain i was trying it with 6 connections(exaggeration) and couldn't get on that check valve, im gonna head to my local indy shop tomorrow to have them run diagnostics

[wrrush]

I will let u know the outcome, great thread. I just dont have anymore time

[mweisdorfer]

Originally Posted by wrrush

i was looking at the cam chain tension-er. dam those bolts are a pain i was trying it with 6 connections(exaggeration) and couldn't get on that check valve, im gonna head to my local indy shop tomorrow to have them run diagnostics

Vanos Solenoids are located in the front of the engine just below the valve cover. The cam shaft sensors are kiddie corner from them on the underside of the valve cover.

[wrrush]

We are talking about the vanos filters or check valves not the sensors in the front, those are easy to get to

[wrrush]

So it was the cam ledges. One of them but since the mechanic is in there im going to have him do both bc an extra $700 now is better than $2300 later. Anything else he should check while hes in there???

[dpaul]

Hopefully ledges will do it. You had mentioned a recent replacement of valve cover gasket in your first post - if that did not eliminate the leak, then it might be time to replace the valve cover itself.

Other than that, can't think of anything.

Definitely report back on outcome

[wrrush]

What leak? I replaced the valve cover and gasket im not worried abt the cover its the sensor n that was found to b the ledges. Im confused abt ur post dpaul

[dpaul]

Originally Posted by wrrush

So it was the cam ledges. One of them but since the mechanic is in there im going to have him do both bc an extra $700 now is better than $2300 later. Anything else he should check while hes in there???

You had asked what else should be done while you're in there. Since in your first post you mentioned that you replaced the valve cover gasket, I assumed you did so because there was a valve cover leak. So I'm asking if the leak was fixed. If not, replace the valve cover itself because you've already removed it to get in there! Not because it has anything to do with the 2AA0 code.

I hope that makes sense to you.

[wrrush]

Ah ok no i just replaced gasket bc it has been a while since it was replaced, but thanks for thinking further

[wrrush]

so still waiting on the car but if anyone gets their ledges done while they are in there have them change the soft lifters and have them replace the two check valves, its an extra 100 - 200 in parts and it will save you a ton of headache.

also dont do one ledge do both, only doing one ledge saves you 500 but having to replace that in the future is 2100, so just get both done for 2600