MTO-approved inspection station 1180 Midway Blvd, Unit 5 · Mississauga ON Mon–Sat 09:00–18:00 ET Talk to a tech: (905) 677-7663
Mr Diesel Inc — EST 2018
(905) 677-7663 Book a bay
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Heavy truck diagnostics in Mississauga

DDDL, Cummins INSITE, Cat ET and JPRO on the bench. We trace a fault to the sensor, the harness or the actuator before anyone orders a part.

Call (905) 677-7663 Request a slot
Scan coverage 4 OEM
2.0 h
Typical scan
4
OEM platforms
48 hr
Typical booked slot
MTO
Approved station

Freeze-frame data is captured before anything is cleared — a code that is cleared without a record is a code you get to pay for twice.

What we scan

Read it, verify it, then quote it.

Parts-swapping is expensive guessing. Every fault gets verified against live data or a bench test before it lands on a quote.

Engine and aftertreatment faultsFull ECM scan with freeze-frame data, plus soot, ash and DPF pressure readings.
DEF, SCR and NOx systemsFluid quality, dosing unit output and sensor readings verified against spec.
Derate diagnosisEmissions derates separated from mechanical power loss before parts are quoted.
Electrical and no-start faultsBatteries, starting circuit, grounds and harness chafe traced with a meter, not a parts cannon.
ABS and chassis modulesWheel-speed sensors, modulators and body controllers read and tested.
Automated transmission faultsI-Shift, DT12 and Eaton actuator and calibration faults read and corrected.
Road-test data captureLive data logged under load, because plenty of faults will not show up idling in a bay.
Second opinion on a quoteBring someone else’s diagnosis and we will verify it before you spend the money.
How it runs

Cheapest likely cause first.

01

Full scan

Every module read, freeze-frame data saved before anything is cleared.

02

Verify

Sensors, wiring and actuators tested against spec to confirm the code is telling the truth.

03

Written findings

What is wrong, what caused it, and what it costs — in writing.

04

Repair and re-scan

Approved work done, then re-scanned and road-tested to confirm the fault is gone.

Book it

Book a diagnostic.

Send the codes if you have them and say whether the unit is derated. Derates and no-starts get slotted ahead of routine work.

Dash lamp on right now? (905) 677-7663
Which diagnostic software do you have?+

Detroit DDDL, Cummins INSITE, Cat ET and JPRO for multi-brand coverage — enough for a mixed fleet without sending units to three different dealers.

Will the diagnostic fee come off the repair?+

Tell us up front that you intend to repair with us and we will discuss it when we quote. What we will not do is skip the diagnosis to make a repair look cheaper.

Can you verify another shop’s diagnosis?+

Yes, and we will tell you plainly if we agree with it. A second opinion costs a lot less than the wrong repair.

Request a diagnostic

Callback within one business hour, Mon–Sat.

Goes straight to the service desk.
Related

Related work

Won’t regenAborted regens traced before a filter is quoted.DEF warning lightDEF quality, dosing and NOx faults sorted.Annual inspectionMTO safety inspection with the sticker same day on a clean pass.Fleet programsA/B/C schedules built around your duty cycle.