Parts for your 2022 Toyota Land cruiser-Temperature sensors

2022 Toyota Land Cruiser temperature sensors: what they do and how to look after them

Based on Toyota’s technical literature for the 300 Series (Toyota Repair Manual, Electrical Wiring Diagram, and the engine control DTC charts used in Toyota GTS/TIS), temperature sensors are absolutely fitted to the 2022 Toyota Land Cruiser. These include the engine coolant temperature (ECT) sensor, intake air temperature (IAT) sensor, ambient air temperature sensor, transmission fluid temperature sensing, and—on the 3.3L twin‑turbo diesel—multiple exhaust gas temperature (EGT) sensors around the turbo and DPF.

On this model, temperature sensors are the quiet achievers that keep the big Cruiser running sweet. The ECT sensor lets the ECU set fuelling and ignition when cold, kicks the radiator fans in at the right time, and even influences transmission shift strategy. The IAT sensor helps the ECU calculate air density for accurate load and boost control. The ambient sensor informs climate control and exterior temp display. Diesel variants rely on EGT and DPF temperature sensors to protect the turbo, manage emissions, and time regenerations. If one of these goes out of whack, expect poor cold starts, rough idle, high fan speeds, harsh shifting, lazy performance, excessive fuel burn, or the MIL lighting up with codes like P0116–P0119 (ECT), P0111–P0113 (IAT), or EGT/DPF‑related faults.

There’s no fixed replacement interval, but they should be checked during major services or when diagnosing drivability issues. A quick scan-tool check of live data against actual conditions (cold start equals near ambient, warmed engine equals thermostat spec) is the fastest way to spot a liar.

• If replacing the ECT: let the engine cool, drain enough coolant to drop below the sensor, swap with a quality OE‑spec part, fit a new sealing washer/O‑ring, torque to spec, refill, and bleed air. Clear DTCs and confirm warm‑up behaviour.
• IAT (often integrated in the MAF): inspect for dust/oil. If contaminated, use MAF‑safe cleaner only. Don’t touch the element.
• Diesel EGT/DPF sensors can seize in the exhaust. Use penetrating oil and correct sockets, replace heat‑damaged wiring. After replacement, run a forced regen or road test to verify temps track correctly.
• Ambient sensor sits behind the grille—avoid pressure‑washer damage and check for broken clips after off‑road work.
• Always inspect connectors for green crusties, pulled pins, or brittle loom near heat sources.

Done right, these simple sensors help the 300 Series stay cool, efficient, and ready for the long haul across Aus or Aotearoa.

Where are the main temperature sensors on a 2022 Land Cruiser 300?

Common locations are: ECT near the thermostat/water outlet on the V6, IAT within or beside the MAF in the intake tract, ambient sensor behind the front grille, transmission temperature sensing within the valve body/solenoid assembly, and—on the diesel—EGT sensors pre‑turbo, post‑turbo, and around the DPF. Exact positions vary by engine and market spec.

When should temperature sensors be replaced?

There’s no set kilometre limit. Replace when diagnostics show incorrect readings, when a related DTC returns after wiring checks, or if symptoms match a failed sensor. As a guide, inspect at major services and any time cooling, shifting, or DPF behaviour seems off.

Can temperature sensors be cleaned or should they be replaced?

IAT elements can sometimes be gently cleaned with MAF‑safe spray. ECT and EGT sensors aren’t good candidates for cleaning—if readings are out of spec, replacement is the reliable fix. Always check wiring and connectors first, as many “sensor” faults are actually harness issues.