Parts for your 2011 Lexus Is-Camshaft sensor

2011 Lexus IS camshaft sensor: what it is, why it matters, and when to replace it

Based on Lexus/Toyota technical literature for the 2011 IS range—namely the Lexus IS 250/350 Repair Manual (Engine Control: SFI System), the Lexus IS F 2UR-GSE Engine Control documentation, and Toyota’s Dual VVT-i training materials—a camshaft position sensor (CMP) is fitted and used across 2011 Lexus IS variants. Petrol V6 and V8 models use cam sensors for cylinder identification and variable valve timing control (VVT-i), and the diesel variant also employs a cam sensor for precise injection timing. So, yes—the 2011 Lexus IS definitely uses a camshaft sensor.

On a 2011 Lexus IS, the camshaft sensor is a small but critical piece of engine tech. It tracks camshaft position and sends that info to the engine control module so fuel injection, spark timing, and VVT-i can be dialled in bang-on. That’s how the IS keeps its smooth idle, crisp throttle response, tidy emissions, and good fuel economy in real-world Aussie and Kiwi driving.

It’s not a scheduled replacement item, but it is worth a check during major services—especially as kilometres rack up. The sensor sits on the cylinder head(s): on petrol V6 and V8 models there’s typically one per bank, on the diesel there’s generally one. If the connector, wiring, or O-ring starts playing up, the ECM can’t trust the cam signal and things go pear-shaped.

• Common signs it’s unhappy: hard starting (hot or cold), rough idle, misfires under load, noticeable loss of go, higher fuel use, and a Check Engine Light. Scan tools often report codes like P0340–P0344 or P0365–P0368.
• Quick checks: look for oil wicking into the plug, brittle loom sections near heat, and loose or corroded terminals. Fix any obvious wiring dramas before blaming the sensor.
• Replacement tips: use a quality OEM-equivalent sensor with a fresh O-ring, lightly oil the seal, and tighten to the workshop manual spec. After fitting, clear codes and confirm VVT-i operation and idle quality with a scan tool.

For owners chasing reliability, asking the workshop to inspect the cam sensor connectors and harness during a major service is smart preventative care. There’s no special maintenance beyond keeping oil leaks in check and protecting the wiring from heat and vibration. When a sensor does fail, replacement is straightforward for a competent technician and gets the IS running sweet again with no dramas.

FAQs

How many camshaft sensors does a 2011 Lexus IS have?
Most 2011 IS petrol V6 models (IS 250/350) have two—one per bank. The IS F V8 also employs bank-specific cam sensors. Diesel variants typically use one. Always confirm by VIN and engine code before ordering parts.

Can a 2011 Lexus IS run with a faulty camshaft sensor?
Sometimes, but not well. The ECM may rely on the crank sensor and run in a limited strategy, leading to hard starts, rough idle, poor performance, and extra fuel use. It may also refuse to start in some failure modes. Proper diagnosis and replacement prevents further headaches.

Where is the camshaft sensor located on a 2011 Lexus IS?
It’s mounted on the cylinder head near the end of the camshaft—on V engines, one on each bank, on the diesel, typically one sensor. Access varies by engine, some are right up top, others need intake or engine cover removal for room.