Freightlinerrepair & diagnostics
Freightliner Cascadias and M2 Business Class trucks run Detroit DD13/DD15 and Cummins engines. We use Detroit diagnostic software to read fault codes, clear SCR/DEF derates, and fix the charging-system failures common to these trucks.
Shop & mobile service for Freightliner
Connect the right laptop, pull active and inactive codes, and read live data before recommending parts.
Forced (parked) regens, SCR/DEF dosing faults, NOx sensor diagnosis, and derate clearing.
Slack adjusters, chambers, relay valves, drums, linings, and ABS blink-code reading.
Alternators, batteries, parasitic draws, 7-way, and crank/no-start diagnosis.
Air ride ride height, air bags, leveling valves, and walking-beam service.
Preventative maintenance A/B/C and annual DOT inspections that leave you compliant.
Commercial tire sales, mounting, balancing, wheel seals, bearings, and hubs.
Lights, brakes, suspension, landing gear, doors, and reefer refrigeration troubleshooting.
The faults we see most
Doser crystallization, DEF pump failure, and SCR catalyst derates on Detroit platforms.
We pull active vs inactive codes with Detroit software and read live data before recommending parts.
Alternator diode failures and parasitic draws that strand Freightliners on the highway.
Freightliner engine platforms
We connect the right diagnostic laptop for each engine platform Freightliner runs, pull the fault codes, and read live data before recommending a single part. Below are the engines we service on Freightliner.
Read the diagnostic path
MTG Shops does not perform engine overhauls or major component rebuilds in-house. We have quality partners in every market who specialize in Freightliner overhauls and in-frame / out-of-frame rebuilds. We handle the diagnosis, get the truck to the right specialist, and coordinate the handoff. You get an honest answer about what we fix and what goes to a trusted partner.
Get a bay time and a straight estimate.