Freightliner CPC4 & Diesel ECM Repair – Same Day Service

No-start, communication faults, or dead CPC? We diagnose and repair it fast.

ECM Authority specializes in diesel engine control module (ECM) and Freightliner CPC4 repair for heavy-duty trucks. We provide component-level diagnostics and repair for Cummins, Detroit Diesel, and PACCAR systems with fast turnaround and nationwide mail-in service.

Precision component-level repair with lab-grade diagnostics, professional programming, and bench testing. All modules can be coded to your VIN number and specifications.