7 Machine
Home / BMW

Crankshaft And Camshaft 2a99 2a98 2a9a 2a87 Codes

jaza452011-01-08 00:08:46 +0000 #1
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.


gizmo335i2011-01-08 00:23:54 +0000 #2
Man, you might have better luck posting this on n54tech....sweet car and nice mod list BTW....
jaza452011-01-08 00:53:34 +0000 #3
Update: Replaced both Vanos solenoids....Problem still there....
JoshM8132011-01-08 01:20:36 +0000 #4
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...
jaza452011-01-08 01:17:08 +0000 #5
Quote:

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...

Reply

Name:
Content:


Other posts in this category