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Flash: Powertrain Diagnostic And System Enhancements This bulletin involves reprogramming the Powertrain Control Module (PCM) with the latest Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find that the following DTC has been set: · **P0335 - Crankshaft Position Sensor Circuit.** The following software improvements are also available: · Improved vacuum sensor diagnosis for the Hydraulic Booster Compensation (HBC) feature in the Electronic Suspension Control (ESC) module. · Software to enable vehicle max speed programming using wiTECH. The following software improvements are also available to allow the brake lamp to illuminate when any of the following occur: · Engine Vacuum Pump (EVP) runs for too long and shuts off. · Any EVP pump faults. · Any brake booster sensor faults.