N20 and N26 Engine: Various VANOS System Faults Stored in DME. The Service Engine Soon lamp is...

Bulletin number

121513

Component

Engine

Summary

N20 and N26 Engine: Various VANOS System Faults Stored in DME. The Service Engine Soon lamp is illuminated; Engine Malfunction warning is illuminated; and the vehicle has reduced power output. Various faults related to VANOS operation are stored in the DME. While performing the test plan, the results may appear to be inconclusive because the fault will not clear from DME Fault Memory. The ISTA/D diagnostic test plan does incorporate a VANOS bleed function, but it does not advise the technician to bleed the VANOS system after a VANOS or engine oil supply component replacement. CAUSE This is due to an error in the current level of ISTA/D. The error will be corrected with ISTA/D 2.41.0.

Owners of these vehicles have filed 1,043 complaints in the engine category.