Parts for your 2011 Toyota Land cruiser-Knock sensor

2011 Toyota Land Cruiser Knock Sensor — What It Does, Where It Lives, and When to Sort It

Yes, the 2011 Toyota Land Cruiser uses knock sensors on its petrol V8 engines. Toyota’s factory service information for the 200 Series (TIS/Repair Manual, Engine Control – SFI System) lists twin knock sensors for the 2UZ‑FE and UR‑series petrol V8s, with related OBD‑II diagnostics P0325/P0330. The Toyota Electrical Wiring Diagram for these models also shows two knock sensor circuits (often labelled KS1/KS2). By contrast, the 1VD‑FTV 4.5‑litre V8 diesel’s engine control documentation does not include a knock sensor in its sensor suite, as diesel combustion control doesn’t rely on knock detection.

For petrol 2011 Land Cruisers, the knock sensor is a quiet achiever. Bolted to the engine block, a pair of sensors “listen” for the high-frequency vibration that points to detonation (pinging). When they pick something up, the ECU trims ignition timing just enough to protect the engine without stealing more power than it has to. That’s especially handy when towing up a hill on a hot Aussie or Kiwi afternoon, or when running lower octane fuel in a pinch.

There’s no scheduled replacement interval for the knock sensors themselves, but they do appreciate a bit of love during major services. On the V8 petrols, both sensors live under the intake in the valley, so it’s smart to inspect or replace them when the manifold is off for other work (like intake gaskets or coolant crossover jobs). Use quality OEM sensors, renew the sub‑loom if the insulation is brittle, keep connectors clean and dry, and torque the sensor bolts to the spec in the Toyota manual—over‑tightening can dull their “hearing”.

Signs the Land Cruiser’s knock sensor system needs attention include a check engine light with codes P0325/P0330, lazy performance, flat spots, worse fuel economy, or audible pinging under load. The ECU will often pull timing to stay safe, which protects the engine but makes it feel a bit doughy. After any repair, clear codes, take a scan tool for a drive, and check knock correction values and fuel trims.

Good practice for owners: at around 100,000 km when doing spark plugs on the petrol V8, have the intake area and knock sensor harness inspected. Avoid soaking the valley with coolant or oil from leaks, and don’t blast the area with a pressure washer. A careful approach here keeps the Cruiser running sweet and protects that big V8 from avoidable drama.

• Petrol V8s (2UZ‑FE, 1UR‑FE/3UR‑FE): two knock sensors fitted.
• Diesel V8 (1VD‑FTV): no knock sensor by design, not required for diesel combustion control.

Does a 2011 Land Cruiser have a knock sensor?
Petrol V8 models do—there are two sensors mounted in the valley under the intake. Toyota’s service info and wiring diagrams show KS1/KS2 and fault codes P0325/P0330 for these engines. The 1VD‑FTV diesel doesn’t use a knock sensor because diesel combustion is managed differently and detonation sensing isn’t part of its control strategy.

What are the symptoms and fault codes of a bad knock sensor?
Expect a check engine light, sluggish performance, poorer fuel economy, and sometimes pinging under load. Typical codes are P0325 (Knock Sensor 1 Circuit) and P0330 (Knock Sensor 2 Circuit) on petrol models. The ECU may pull timing to protect the engine, which makes it feel flat until the issue is fixed.

Is it safe to drive with a faulty knock sensor?
Short term, the ECU usually retards timing to keep things safe, so it’s unlikely to grenade the engine on the spot. But performance and economy suffer, and if there’s genuine detonation the safety margin shrinks. Best bet: diagnose and repair promptly, then road‑test with a scan tool to confirm normal knock control.