Why does a Fortuner's DPF clog?
Soot builds up in the filter and has to be burned off, which the engine does by adding fuel after combustion to raise the exhaust temperature. Toyota said the filter could clog if the car wasn't driven long enough at high speed for that to happen. A filter that clogs and can't regenerate (burn itself clean) has to be replaced.
Toyota's response came in steps. A June 2017 service campaign, GGG38, re-programmed the engine computer on 2015 to 2017 cars. From August 2018 Fortuners got a DPF switch so the driver can start regeneration, and owners of earlier cars were offered a retrofit by letter that December. If your older Fortuner has no switch, ask the mechanic about it. If a warning has already come on, what a DPF warning light means is the place to start.
What does DPF trouble look like on a Fortuner?
Fortuners bought between October 2015 and April 2020 are the ones known for it. The first sign is usually the DPF light showing up more often than it used to, or not going out after a run. RACQ says an ignored filter means less power and, in the end, limp-home mode with the engine and DPF lights on.
A good mechanic reads the stored codes first, checks whether the GGG38 re-program and the DPF switch are on the car, and looks for any fault stopping regeneration. Get the cause in writing, not just "it needs a filter". Then ask Toyota or a mechanic to check your VIN for any program or recall that applies, and keep every invoice that mentions the DPF.
Why has my Fortuner gone into limp mode?
Dust is one known cause. A March 2017 service bulletin says fine dust can pass the air filter and stick to the mass air-flow sensor, which measures the air going into the engine. False readings put the car in limp home mode: power drops, and stability and traction control switch off. Slow down, and get somewhere safe.
The bulletin's remedy is cleaning the air filter more often in dusty conditions and cleaning the sensor. If your Fortuner lives on gravel roads or a farm, say so when you tell us the job. Limp mode has other causes too, so a mechanic should read the codes before replacing anything.
Which Fortuner recalls should you check?
Fortuners made from 29 July to 1 December 2015 were recalled in February 2018 because airbags could be de-activated, with the airbag warning light on. Diesel Fortuners on sale from 7 August 2018 to 12 August 2020 were recalled under campaign VGG75 because a faulty brake booster may lose braking assistance after repeated pedal use. Brakes that feel wrong mean stopping somewhere safe and switching off. Your VIN at vehiclerecalls.gov.au shows what's still open.
How often is a Fortuner due for a service?
Every six months or 10,000 km, whichever occurs first. Australian Car Reviews lists the camshafts as chain-driven, so there's no timing belt to plan around. The 4WD system is part-time with high and low range and a rear differential lock, so mention any towing, beach or low-range work.
The warranty is five years with unlimited kilometres, and CarExpert says powertrain cover runs to seven years if you maintain the car on time. Read your book's conditions on those extra years. A qualified independent mechanic servicing a Fortuner to Toyota's schedule and specifications doesn't by itself void the new car warranty.
Tell us what the car's doing and how it's mostly driven. A local mechanic who specialises in your car.
Where we'd start with a Fortuner
Look at how the car is driven. If it's school runs and shopping, we'd have a mechanic who works on diesels check whether Toyota's updates and the DPF switch are on the car, then give it a regular longer run at highway speed. If it's dusty country, we'd ask for the air filter and sensor to be looked at more often than the book suggests. Either way, a warning light is worth acting on early, because a clogged filter is a far bigger job than a check.