Parts for your 2002 Toyota Land cruiser-Camshaft sensor

2002 Toyota Land Cruiser camshaft sensor: what it does and how to look after it

For the 2002 Toyota Land Cruiser (100 Series), the petrol V8 model (UZJ100 with the 2UZ‑FE) is fitted with camshaft position sensors—one on each cylinder bank. This is documented in Toyota’s Land Cruiser 100 Series Repair Manual (RM835U) and the 2002 UZJ100 Electrical Wiring Diagram, which show the ECM using G‑signal inputs from the camshafts for sequential fuel injection and ignition timing. Diesel variants may reference timing from the pump and crank, but for the 2UZ‑FE petrol, camshaft sensors are absolutely part of the system.

On a 2002 Land Cruiser running the 2UZ‑FE, the camshaft sensor’s job is to tell the engine control module exactly which stroke each cylinder is on. That precise “cylinder ID” lets the ECM fire the injectors and coils at the right moment, especially during start-up and when the engine’s just off idle. Without a clean signal, the V8 can crank longer, stumble, or drop into a limp mode while the ECM guesses from the crank sensor alone.

The sensors live at the front of each cylinder head near the timing belt area. They’re sealed, solid-state units, so there’s no regular service interval—think of them as inspect-not-service. During routine servicing, it’s smart to check the connectors and wiring for heat hardening, oil contamination, or broken clips. If the rocker cover gaskets have wept, clean the plugs and loom, as oil intrusion can skew the signal.

Replacement is straightforward for a home spannerer:

• Disconnect the battery negative, pop the bonnet, and locate the sensor on the head.
• Unplug the connector, remove the small retaining bolt, and twist the sensor gently to free the O‑ring.
• Lightly oil the new O‑ring, seat the sensor squarely, and tighten the bolt to the specified light torque (small fastener—check the Toyota manual, around 9–10 N·m is typical).

Go OEM (Denso/Toyota) if you can, cheaper copies can throw intermittent faults when hot. After fitting, clear any stored codes and take it for a drive to confirm no return of a cam-related DTC (often seen as P0340/P0345). A good time to replace ageing sensors pre-emptively is when you’re already in there for a timing belt and water pump at around the 150,000 km mark—access is easier and it’s one less thing to worry about on a big trip.

Watch for tell-tales like hard starting, random misfires, surging at low speeds, or the check engine light. If those crop up, a quick scan and a look at live data for cam sync will usually point you in the right direction.

Does a 2002 Land Cruiser have one or two camshaft sensors?

The 2UZ‑FE V8 uses two—one on each cylinder bank—to give the ECM a clean cylinder identification on both sides of the engine. That’s why you’ll often see separate fault codes for Bank 1 and Bank 2 when one plays up.

What are the common symptoms of a failing camshaft sensor on a 2UZ‑FE?

Expect longer crank times, the occasional stumble just off idle, rough running, or a check engine light with cam correlation codes. It may run “OK” on the crank sensor alone but feel lazy and inconsistent, especially when hot.

Should the camshaft sensors be replaced with the timing belt?

They aren’t a scheduled item, but many owners choose to swap them at timing belt and water pump time (around 150,000 km) due to easy access and the age-related heat cycling they endure. It’s cheap insurance for remote touring.