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A diesel engine is very robust, but it can be very picky when it comes to its filters, fuel, and emissions components. An experienced diesel technician will recognize an issue in any one of these areas well before there is a need to tow the vehicle. The table below shows a list of the typical services performed on a diesel vehicle and the costs.
Last updated: October 2026
Oil and filter, fuel filter, air filter and a general look over. Diesels hold more oil than gas engines and need the correct spec, so this costs more than a regular oil change.
Diesel particulate filters (DPF), EGR valves and diesel exhaust fluid (DEF) systems are the most common source of warning lights on newer diesels. Short trips and lots of idling make them worse.
Hard starting, rough running, black smoke or poor fuel economy can point to injectors, a weak fuel pump or contaminated fuel.
Loss of power or a whistling sound can mean a turbo problem. Diesel cooling systems also work hard, especially when towing.
Typical ranges only. Engine size, truck model and parts availability change the price a lot.
Can be glow plugs, a weak battery or a fuel problem.
Often DPF, DEF or EGR. Do not ignore it, as some trucks drop into reduced power.
Each colour hints at a different issue, from fuel to coolant to oil.
Common with clogged filters, turbo trouble or injector wear.
More common in winter. Drain it and find out where the water is coming from.
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Follow the owner's manual. Many diesels need an oil change every 8,000 to 12,000 km, but heavy towing, idling and short trips count as hard use, so shorter intervals are safer.
A diesel particulate filter traps soot from the exhaust. It cleans itself on longer highway drives. Mostly short trips and idling stop that from happening, so it clogs.
Yes. DEF is sold at most fuel stations and auto parts stores. Use only fluid made for diesel emissions systems and never pour it into the fuel tank.
Often yes, because diesel engines can last a very long time. Ask the shop for an itemized estimate and weigh it against what a replacement truck would cost.