Parts for your 2020 Toyota Land cruiser-Oxygen sensor

2020 Toyota LandCruiser oxygen sensor: is it fitted and what does it do?

For Australian and New Zealand–spec 2020 Toyota LandCruiser 200 Series models (the 4.5‑litre 1VD‑FTV twin‑turbo diesel), an oxygen sensor isn’t fitted and isn’t used for engine management. This call is backed by Toyota’s technical literature: the 1VD‑FTV Repair Manual and New Car Features describe diesel engine control using mass‑airflow and boost measurement, exhaust gas temperature and DPF differential pressure—without listing any upstream air‑fuel ratio (A/F) or downstream O2 sensors. The Toyota Electronic Parts Catalogue for J200 (AU/NZ market, 2018–2021) likewise shows DPF pressure and EGT sensors in the exhaust, but no oxygen sensors. That aligns with ADR 79/04 (Euro 5) diesel strategies, where DPF and EGR are the main emissions systems.

Why no oxygen sensor on the 2020 LandCruiser diesel? Diesels run very lean with lots of excess oxygen most of the time, so a lambda (O2) signal isn’t needed to hold a strict 14.7:1 air‑fuel ratio like a petrol engine does. Instead, the ECU controls fuelling based on air mass (MAF), boost (MAP), rail pressure and injection timing, then manages emissions with EGR and a diesel particulate filter. For DPF operation and regeneration, it relies on temperature and pressure feedback, not an O2 probe. That’s why there’s no oxygen sensor to service on AU/NZ‑spec 2020 LandCruiser diesels.

Worth noting for grey‑imports and other markets: petrol V8 LandCruiser 200 models (e.g., 3UR‑FE) do run wideband A/F sensors upstream and conventional O2 sensors downstream. If someone’s 2020 LandCruiser is a petrol import, it will have oxygen sensors and those should be diagnosed or replaced per Toyota guidance.

• Sensors used instead of O2 on the 1VD‑FTV: Mass Air Flow (MAF), Manifold Absolute Pressure (MAP), intake air temp, multiple Exhaust Gas Temperature (EGT) sensors, DPF differential pressure sensor, crank/cam position, fuel rail pressure.
• Key sources: Toyota Repair Manual (1VD‑FTV, Diesel Engine Control and DPF sections), Toyota New Car Features (200 Series, 1VD‑FTV), Toyota Electronic Parts Catalogue (J200 AU/NZ).

Does a 2020 LandCruiser 200 (AU/NZ diesel) have an oxygen sensor?

No. The 1VD‑FTV diesel doesn’t use oxygen sensors. Emissions control is handled by EGR and a DPF with temperature and pressure sensing. If the vehicle is a petrol‑engine import, that’s a different story—those do have A/F and O2 sensors.

Which sensors manage emissions on the 1VD‑FTV, and how are issues diagnosed?

Expect a DPF differential pressure sensor, multiple EGT sensors, plus MAF/MAP for airflow and boost. Typical diagnostics involve checking DPF pressure hoses for blockage or leaks, confirming EGT sensor readings, and verifying MAF/MAP values. Faults like poor performance, frequent regens or a DPF efficiency code usually point to pressure/temperature sensor issues or a soot‑loaded DPF rather than an oxygen sensor.

When should an oxygen sensor be replaced on a 2020 LandCruiser?

For AU/NZ‑spec diesel models, it’s not applicable because there isn’t one. For petrol imports (3UR‑FE), Toyota doesn’t mandate routine O2/A‑F sensor replacement at a set kilometre count—replace when diagnostics indicate slow response, heater faults or mixture codes, or when fuel economy drops. Always use the correct wideband A/F sensors upstream and O2 sensors downstream.