Toyota 1GD-FTV engine: known problems

The early 1GD DPF was found by the Federal Court to be defective: it could not regenerate effectively in normal use, clogging up, emitting white smoke and a foul exhaust smell during regen, and warning that the filter was full. Affected HiLux/Prado/Fortuner diesels bought Oct 2015-Apr 2020 were eligible for compensation for lost value.

The 1GD-FTV DPF system in vehicles acquired 7 Feb 2016 - 19 Dec 2024 was found defective by the Federal Court (upheld by the High Court Nov 2024): early software could let the DPF clog, producing excessive white smoke, poor performance and forced regens. Toyota fitted manual regen switches and issued ECU/field fixes; affected owners may be eligible under the class action.

Federal Court found the DPF defective on units built October 2015 to April 2020. Symptoms: white smoke regens, foul smell, repeated regen warnings, fuel consumption spike, limp mode.

Fine dust bypasses the air filter and contaminates the MAF sensor. Triggers limp mode and disables traction/stability control.

Fine dust can coat the mass-airflow sensor, feeding bad data to the ECU and dropping the van into limp mode - same trait as other 1GD-FTV applications.

Early 1GD engines reported high oil consumption, and frequent failed/incomplete DPF regens plus short-trip running can dilute the engine oil with diesel, raising oil level and degrading lubrication.

Common-rail injectors wear and the EGR/intake accumulates soot over time, causing rough running, smoke and reduced performance - worsened by poor fuel quality and infrequent servicing.

Standard common-rail maintenance - injector wear and EGR/intake soot build-up at higher mileage causing smoke, rough idle and lost power.

Like all modern common-rail diesels, the 1GD accumulates soot in the EGR valve and intake, causing rough running, reduced economy and limp-mode events - worse on short stop-start delivery cycles.

Even with the improved hardware and the manual regen button, a DPF diesel used only for short cold trips will accumulate soot, throw DPF-full warnings and need forced regens; neglected cases require a clean.

Carbon can cause the variable-nozzle turbo vanes/actuator to stick, giving over- or under-boost, limp mode and lost performance.

Combined with DPF issues, EGR cooler clogs heavily.

Carbon buildup still occurs but less aggressive than pre-fix 1GD. Causes rough idle and hesitation.

Long-term reliability of the mild hybrid system in Australian conditions not yet known.

Still has AdBlue and DPF - same maintenance considerations as N80 late.

The 1GD in HiLux/Prado/Fortuner (Oct 2015-Apr 2020 build) was the subject of an Australian class action over DPF white smoke and incomplete regens; Toyota revised the software and says the 70 application is improved, but short-trip DPF loading remains the engine's key watch-point.

Early 1GD diesels suffered clogged DPFs and high oil consumption. Toyota service campaign GGG38 (June 2017) reflashed the ECU to raise exhaust temps and lengthen regen, largely resolving it.

The 1GD-FTV's diesel particulate filter is the engine family's long-running weak point (the subject of an Australian class action over the 2015-2020 HiLux/Fortuner/Prado calibration). Cars driven mostly on short urban trips can't complete a passive regen, leading to a clogging warning, forced/active regens, fuel dilution of the oil and white smoke. The 250's revised calibration is better but the physics are unchanged.

Owners have reported timing-chain/front-cover noise on high-km examples (e.g. 180k km), usually a tensioner/guide wear issue rather than a snapped chain.

Rear sags under sustained heavy load. Common across all N80.