[jaza45]

I've tried to clear them up, trying to see a pattern but they keep coming back. Jb3 is out and back to stock.

Im having long crank but no hpfp codes, it goes into limp mode right as soon as it starts.

I even switched the vanos solenoids from top to bottom to see if anything changes but nothing..Im going to try to replace them both just in case...

when the car starts it sounds a little rough but no crazy sounds, its drivable on limp mode but no power...

Im out of warranty so no dealership trip just yet, maybe if I cant find a solution, Im trying to keep this thread informative, so no stupid comments..

ANY IDEAS?

3100:
3100 boost-pressure control, deactivation
Error will not cause a warning light
Error is not currently present
Test conditions have been completed

2A99:
2A99 Crank shaft - outlet camshaft, correlation
Error will cause a warning light
Error is not currently present
Test conditions have been completed
Short circuit or signal interruption

Freeze Frame Information
Odometer 37888kms 23542miles
Engine speed 896.00 rpm
motor status 2.00 0-n
(engine)- oil temperature 40.00 °C
voltage Kl. 87 13.61 V
Event 2
Odometer 37888kms 23542miles
Engine speed 1,280.00 rpm
motor status 2.00 0-n
(engine)- oil temperature 46.00 °C
voltage Kl. 87 11.88 V
Event 3
Odometer 37888kms 23542miles
Engine speed 1,120.00 rpm
motor status 2.00 0-n
(engine)- oil temperature 57.00 °C
voltage Kl. 87 12.09 V


2A98:
2A98 Crank shaft - inlet camshaft, correlation
Error will cause a warning light
Error is not currently present
Test conditions have not been completed
Short circuit or signal interruption

Freeze Frame Information
Event 1
Odometer 37888kms 23542miles
Engine speed 896.00 rpm
motor status 2.00 0-n
(engine)- oil temperature 40.00 °C
voltage Kl. 87 13.61 V


2A9A:
2A9A Camshaft sensor inlet, signal
Error will cause a warning light
Error is not currently present
Test conditions have been completed
Short circuit or signal interruption

Freeze Frame Information
Odometer 37888kms 23542miles
Engine speed 192.00 rpm
motor status 1.00 0-n
(engine)- oil temperature 46.00 °C
voltage Kl. 87 11.37 V
Event 2
Odometer 37888kms 23542miles
Engine speed 224.00 rpm
motor status 1.00 0-n
(engine)- oil temperature 60.00 °C
voltage Kl. 87 11.68

2A87:
2A87 Outlet-Vanos variable cam control test, mechanics
Error will cause a warning light
Error is not currently present
Test conditions have been completed

Freeze Frame Information
Event 1
Odometer 37888kms 23542miles
Engine speed 0.00 rpm
camshaft outlet -40.00 °CRK
camshaft outlet nominal value -40.00 °CRK
Engine temperature -48.00 °C


This is what I've found so far


SI B11 02 08
Engine October 2010
Technical Service

This Service Information bulletin supersedes SI B11 02 08 dated August 2010.

designates changes to this revision

SUBJECT
Power Reduction, FC 2A82 Intake VANOS and/or FC 2A87 Exhaust VANOS Camshaft Faults are Stored in DME


MODEL
E82 and E88 (1 Series) with N51, N52K and N54 engines produced from 1/2008

E90 and E91 (3 Series) with N52 engine produced from 3/2005 through 6/2006

E90, E91, E92 and E93 (3 Series) with N51, N52K and N54 engines produced from 7/2006

E85 and E86 (Z4) with N52 engine produced from 1/2006

E83 (X3) with N52K engine produced from 9/2006

E60 and E61 (5 Series) with N52, N52K and N54 engines produced from 3/2005

E70 (X5) with N52K engine produced from 10/2006

E71 (X6) with N54 engine produced from 1/2008


SITUATION
The “Service Engine Soon” (MIL) lamp is illuminated and a power reduction is clearly perceptible. This situation can occur after driving for some time with the engine already at full operating temperature. If the ignition is cycled, the engine then usually performs normally.

The following faults are stored in the DME:

2A82 VANOS intake – stiff; jammed mechanically

2A87 VANOS exhaust – stiff; jammed mechanically

3100 Boost-pressure control, deactivation – boost-pressure buildup prohibited (N54 only)

CAUSE
The VANOS faults can be caused by an insufficient oil pressure supply to the inlet VANOS adjustment unit. To effectively move the camshafts to the target positions in the specified time and under all engine conditions, sufficient oil pressure supply to the VANOS control pistons must always be available. When the engine operation requires that the VANOS quickly advance or retard the intake or exhaust camshaft, fault 2A82 or 2A87 may be set if the camshaft is “late”, or does not reach the target position. In this situation, engine power may be reduced and a check control message is displayed. The consequential fault 3100 can also be set in the DME fault memory as well.

PROCEDURE

Perform all applicable test plans for the faults stored. A mechanical restriction or electrical failure of the VANOS solenoid and/or the electrical circuit can cause insufficient oil supply to the VANOS assemblies as well. If the results of the test plans are inconclusive then proceed to step 2.



The oil filter cap insert may have been inadvertently removed during the vehicle’s last oil service. If this insert is not installed, it will result in non-filtered engine oil being supplied to the engine, thus possibly clogging or damaging the VANOS solenoids.


Replace both VANOS solenoids and change the engine oil and filter. Drive the vehicle to verify effectiveness. If this repair is inconclusive and the fault returns, continue to step 4.

If the oil filter cap is found intact, it is possible that the camshaft hook ring seals (3) have worn a groove into the camshaft bearing ledge (1), causing a drop in oil supply to the VANOS unit.



Camshaft bearing ledge

Intake camshaft

Hook ring seals



Note the deep grooves worn into the intake camshaft bearing ledge by the camshaft hook ring seals.



Acceptable camshaft bearing ledge – minor wear marks from the rotation of the camshaft are normal.

If the oil filter cap insert is found to be missing, then the entire oil filter housing cap must be replaced (refer to the EPC). If excessive wear to the camshaft bearing ledge is found, it is only necessary to replace the camshaft hook ring seals and the affected camshaft bearing ledge.

[gizmo335i]

Man, you might have better luck posting this on n54tech....sweet car and nice mod list BTW....

[jaza45]

Update: Replaced both Vanos solenoids....Problem still there....

[JoshM813]

I'm havin the same exact problem right now Jaza..sucks it happened to both of us with fixxfest coming up...

Reeves BMW just replaced my solenoids today...2A98 and2A99 still persist...tech asked BMW if they can do a timing test on it and then if BMW says yes they will do it and end up changing the cam bearing ledges...if not I'll have to do it myself which means investing into the Bentley manual...and expect to work on it for about 6hrs...

[jaza45]

Originally Posted by JoshM813

I'm havin the same exact problem right now Jaza..sucks it happened to both of us with fixxfest coming up...

Reeves BMW just replaced my solenoids today...2A98 and2A99 still persist...tech asked BMW if they can do a timing test on it and then if BMW says yes they will do it and end up changing the cam bearing ledges...if not I'll have to do it myself which means investing into the Bentley manual...and expect to work on it for about 6hrs...

Replaced cam sensor and cranshaft sensor, no luck, so all is left is the bearing ledges....lets see, let me know how the timing test turns out...

[JoshM813]

I will...it has to be your ledges...uve replaced everything else...u had the camshaft sensor that needed to be replaced because the code.

mine popped up friday and I was gonna attempt an 11 second pass without meth because of the great temps...oh well

[SLEEPYDUB]

Any update to this?

[seej333]

Camshaft ledge?

[spxxx]

Any update?

[David1]

More than likely the engine is out of time. If the front crank bolt has loosened, then the timing gear on the crank can move. Time to dealer it.

[spxxx]

Originally Posted by David1

More than likely the engine is out of time. If the front crank bolt has loosened, then the timing gear on the crank can move. Time to dealer it.

The engine is out of time? You mean the timing is off? I have a 3rd party warranty but I'm almost positive it's the cam bearing ledges at this point. Coming issue on 07/08 335is. Will know more tomorrow once my indy scopes it

[spxxx]

So my issue ended up being camshaft bearing ledges. Extended warranty is covering the repair, thankfully

[kevinbahnz]

I pretty much had the same codes. I bought all the parts 2xcamshaft sensors,1x crankshaft sensor and 2x vanos sonlenoids from ECS 2 weeks ago. I did the vanos solenoids first because it was the easiest to get to. Less than 10 minutes later i got them in and the codes haven't been back. The car has 126k miles so I'm still going to do the sensors that i've already bought.

[Chriztofor]

Reviving all threads for 2A9A. Very few people are reporting updates. Here is my story. Make sure your camshaft sensor is seated properly. I replaced it and it was still showing code 2A9A. Also, I was experiencing a long crank and the check engine soon light came on. I took a look at the sensor from the side (using a flashlight) and I was able to see the oring (not suppose to see the oring). DO NOT TIGHTEN THAT LITTLE BOLT. Loosen the bolt and jiggle the sensor until it is seated correctly (no longer can see the oring) then tighten the bolt (not too tight, snug) Car started right up and no more codes are being thrown.

[jacob.fr7]

Really trying to revive thread got an n51 with 90K on the clock.

Getting issues with intake camshaft, engine almost completely failed on me pulling into driveway

If it is camshaft edges does this mean replacement of the engine or is it DIY'able?

Thanks for any help

[Subotai91]

I'm dealing with this same issue, same codes anyway. I've replaced the vanos solenoids, camshaft position sensors, after which the car ran great. Then began throwing codes again, replaced the oil filler cap, ran great again. Once I drive it hard and for the engine temp around 250, it gave me the following codes:

3100 boost pressure control
2a9a crankshaft - inlet camshaft synchronization
2a98 crankshaft - inlet camshaft reference
2a87 exhaust Vanos, mechanism

The car currently has trouble starting and will die shortly thereafter.

Last easy fix I can think of is crankshaft sensor. While I will replace, my hopes aren't high. I'm thinking ledges, or worse.

Has anyone dealt with this situation and done the work themselves? Is it worth pulling the top of the engine and inspecting parts before ordering them, or should I just order new cams and ledges and do everything while I'm in there?

[BRG_N54]

Hello Subotai91, I had a similar issue with one of my 335's, 2A87 & 3100 along with half engine. You can read about it here if you like. Mine would also only have issues when up to temp. It sounds like you are aware of the service bulletin regarding cam ledges, since you did the oil cap and some other fixes. One thing that is not mentioned there is the VANOS check valves that are in the passenger side of the head, if they are clogged it can cause reduced oil pressure to the VANOS solenoids.

Just for more clarity, the 3100 is a result of the other "2A" codes. It is the ECU saying "Something is wrong with the variable valve timing, so I am going to cut boost to prevent damage to other things".

Your statement "I've replaced the VANOS solenoids" could use more clarity. Did you use new parts, used parts? Were they OEM from Pierburg? It's hard to be conclusive about VANOS solenoids unless you are using the OEM parts. I used NTK for mine and they seem to be working well, but some of the very cheap alternatives have mixed reviews. You can see in close-up pictures that the Pierburgs have chamfered oil holes while other, cheaper variants do not.

I think you mistakenly changed "camshaft" to "crankshaft" in your error codes. As those are all camshaft codes, the crankshaft sensor would not play into this scenario. It can't hurt to replace anything for cars as old as these are, just want to make sure we are on the same page. Another common thing that can happen is the two VANOS solenoid connectors can get mixed up, might cause the "has trouble starting and dies" problem.

As for cam ledges, it would take complete disassembly to inspect and determine what needs to be replaced. If you read my thread you will see I replaced one ledge that did not need it. The cams should be fine, they are iron and with proper oil changes will last the life of the car. It's the ledges that are softer aluminum that get grooves worn from the cam sealing rings, also steel. I was only showing exhaust code, while you are showing both. Shopping for cam ledges is a whole other topic of discussion. You would need a timing set and all new bolts, as they are torque to yield.

I see that you are new here, just want to mention that there are several sub-forums for specific drivelines, since you are N54, that might have been a better place to start, since you are asking about the motor specifically. Also, sometimes it is better to open a new thread, specific to your issue, rather than revive a 5-year old topic that has no clear resolution.

It is also helpful to provide as much detail as you can, model, mileage, mods, any known history or reported issues from previous owners, do you have access to a scanner for BMW codes, etc. Basically, the more you give us the better we can assist with your issue.