"B38, B46, and B48 Engines: Engine Noise, Drivability Complaints, and Various DME Faults

Bulletin number

M120415

Component

Engine

Summary

"B38, B46, and B48 Engines: Engine Noise, Drivability Complaints, and Various DME Faults. The vehicle exhibits one the following complaints: z Noise from the lower engine area, described as a high-pitched whine z Loss of power when idling z At a higher engine speed (above 3,000 rpm), a brief decrease in the engine speed can be felt. z Extended cranking before the engine will start z The customer notices an increased level of ""free play"" in the clutch pedal when changing gears. z The clutch pedal remains depressed, and will not return to the disengaged position. z Emergency operation is active, with one or more of the faults listed below. One or more of the following faults may be stored in the vehicle: z 160020 Crankshaft sensor, signal: implausible z 180001 Catalytic converter: efficiency too low z 200D0C Powertrain, safety function: bus signal rpm reduction implausible z 11A002 Fuel high pressure, plausibility: Pressure too low z 1F054D Powertrain, safety function: powertrain reduced power, DSC-signal implausible Note: If additional faults are found in the DME memory (e.g., misfire, camshaft sensor, knock sensor, etc.), then those faults will be the primary focus of the diagnosis using the test plans provided for those faults. ""FC 120408 Boost pressure control: Shut-down as a consecutive reaction"" is only a result of the component fault and is not the primary reason for the complaint or https://www.minitis.net/tiscode/cgi-bin/bulletin.aspx?sie_path=/tsb/bulletins/htm_store/286...1/4/2016 Page 2 of 2 illumination of the engine malfunction warning."

Owners of these vehicles have filed 35 complaints in the engine category.