DPF, EGR and DEF Repair for Diesel Trucks in Saskatoon
Most diesel emissions problems show up the same way: a warning light, a failed regeneration, then limp mode. Replacing the filter or valve without finding why it failed usually means paying for the same repair twice. Sask ECU & Airbag Services diagnoses the whole aftertreatment system — sensors, injectors, boost and engine software — and fixes the cause.
DPF (Diesel Particulate Filter) Services
- DPF warning light and limp mode diagnosis
- Forced (service) regeneration with a scan tool
- DPF cleaning or replacement when needed
- Differential pressure sensor testing and replacement
- Exhaust gas temperature (EGT) sensor replacement
- DOC (diesel oxidation catalyst) inspection
EGR (Exhaust Gas Recirculation) Services
- EGR valve cleaning and replacement
- EGR cooler pressure testing and replacement
- Intake and EGR passage carbon cleaning
- EGR position sensor and actuator diagnosis
DEF / AdBlue and SCR Services
- DEF system fault diagnosis (pump, heater, injector, lines)
- NOx sensor testing and replacement
- SCR efficiency faults and DEF quality issues
- Module programming after component replacement
Root Causes We Check First
Leaking or worn injectors, boost leaks, failed sensors and outdated engine software are behind most repeat DPF and EGR failures. Because we also specialize in ECU diagnostics and programming, we can update or reprogram the engine and aftertreatment modules when a calibration fix is needed.
Trucks and Engines
Light-duty pickups (Duramax, Cummins, Power Stroke, EcoDiesel), commercial trucks and farm and heavy equipment. See our diesel and heavy equipment diagnostics page for the engine brands we service.
Emissions-Legal Repairs Only
We do not remove or disable DPF, EGR or DEF systems. Every repair keeps your truck compliant.
DPF and EGR Questions
Why does my diesel truck keep going into limp mode with a DPF light?
A DPF that cannot finish a regeneration fills with soot until the engine computer limits power to protect itself. The cause is usually upstream: a failed differential pressure sensor, an exhaust temperature sensor, a leaking injector, a boost leak or a sticking EGR valve. We find that cause first, because cleaning the filter without fixing it means the light comes back.
Can you clean a DPF instead of replacing it?
Often, yes. If the filter is loaded with soot or ash but not cracked or melted, a forced regeneration or an off-vehicle cleaning can restore it. We test the filter and its sensors before recommending cleaning or replacement.
What are the signs of a failing EGR cooler?
Coolant loss with no visible leak, white smoke with a sweet smell, overheating, and coolant in the intake are the common signs. We pressure-test the cooler to confirm it before any parts are replaced.
Do you do DPF or EGR deletes?
No. Removing or disabling emissions equipment is illegal in Canada. We repair, clean and replace emissions components so the truck runs properly and stays legal.