Cummins VGT actuator code troubleshooting manual — Code 2387

This Cummins VGT actuator code document is a troubleshooting procedure for Fault Code 2387 on CM2150 engines. It explains why the VGT actuator driver circuit sets a mechanical system fault, what the ECM does when the code is active, and which checks lead to repair or code clearing.

Official Cummins VGT actuator code document details

Brand Cummins
Model coverage ISB6.7 CM2150 (2007-09); extract also references ISB, ISC, and ISL CM2150 service procedures
System/Group DTCs; ISB, ISC, and ISL – VGT Actuator Circuit
Publication no. Not stated in the file extract; referenced service manuals include Bulletin 4021578 and Bulletin 4021569
Year/Revision Last Modified: 20-Jul-2010 and 21-Dec-2010
Pages 14
File size 0.3 MB
Format PDF
Language English

Document table of contents

  • Overview
  • Circuit Description
  • Component Location
  • Conditions for Running the Diagnostics
  • Conditions for Setting the Fault Codes
  • Action Taken When the Fault Code is Active
  • Conditions for Clearing the Fault Code
  • Shop Talk
  • Associated Procedures
  • Troubleshooting Steps
  • Guided Step 1 – Check the fault codes and previous service history.
  • Guided Step 2 – Check the VGT actuator.
  • Guided Step 3 – Clear the fault code.

Applicable truck models

This file applies to Cummins ISB6.7 CM2150 coverage in the listed DTC group, with procedure references for ISB CM2150, ISC CM2150, and ISL CM2150 engines. The fault is Fault Code 2387, PID S027, SPN 641, FMI 7/7, with an amber lamp and a condition where the actual VGT actuator position does not meet the commanded position for more than 10 seconds. The document states that active and stationary regeneration of the aftertreatment system are disabled while the diagnostic fails. See the manufacturer at Cummins official website.

Who needs this Cummins VGT actuator code manual

Workshop technicians need this VGT actuator code manual when diagnosing VGT travel limits, incorrect stop limits, a VGT unable to move to the closed position, or repeat turbocharger-related complaints. It is also useful for service managers reviewing INSITE™ fault code checks, ECM calibration history, boost pressure leaks, exhaust restriction, connector pin condition, actuator gear damage, sector gear movement, and aftertreatment diesel particulate filter inspection.

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