Check engine light, a regen that won't complete, or the dreaded 5-mph derate? Emissions-era aftertreatment is the #1 source of modern truck downtime — and the most misdiagnosed. We fix the cause, not just the code.
A truck that constantly asks for regens is telling you something upstream is wrong — a lazy EGR valve over-sooting the DPF, a temperature sensor lying to the ECM, a leaking doser valve, or simply duty cycles too short to complete passive regeneration. Clearing the code and forcing a regen buys miles, not a fix. Our diagnostic starts with the soot load and sensor plausibility data, traces why the filter loaded up, and repairs that — so the next regen is the last one for a long while, not the first of five this week.
When the truck derates on I-10, the clock starts: missed appointments, frustrated receivers, maybe a missed reload. Call (251) 234-4623 and give dispatch your fault codes and engine. We arrive with laptop diagnostics, resolve what can be resolved on the shoulder — sensor failures, DEF issues, stuck valves — and when the DPF itself needs shop service, we say so immediately rather than billing hours on a shoulder fix that won't hold.
Contaminated DEF, crystallized lines and failed tank heaters cause a disproportionate share of winter and shoulder-season breakdowns — yes, even in Alabama, where cold snaps catch systems unprepared. Quality sensors that read 'bad DEF' are often just reading crystallization. We flush, test and repair the system correctly rather than throwing parts at it.
“My diesel particulate filter got completely clogged and the car wouldn't start at all. They arrived quickly, performed a proper diagnosis, clearly explained the issue and got to work. Within just two hours my car was running again! Huge thanks for the fast response and professional service.”
“My Freightliner started stalling right after fueling up. Other mechanics said the fuel pump was dead and didn't even have one in stock. These guys arrived in about 40 minutes, hooked up the computer and found it was just a failed crankshaft sensor. They noticed oil inside the connector, cleaned everything out, swapped the sensor — and the truck fired right up! A huge thanks to the team!”
“Driving our brand-new Super C diesel home from Florida, sensors going off, the engine went into idle mode as we reached Mobile. We called Sergey and he made it to us within 30 min. He diagnosed the issues and fixed what needed fixing. The price was not what I was expecting — we anticipated paying an arm and a leg. Would MOST definitely recommend!”
Call now for 24/7 mobile service or book your in-shop appointment at our Mobile, AL location.