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 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
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.
http://www.n54tech.com/forums/showthread.php?t=10385&highlight=3100
"Replaced both Vanos Solenoids, problem still there...."
"I replaced the camshaft ledges and its working fine now."
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