Parts for your 2010 Lexus Is-Crank angle sensor

2010 Lexus IS crank-angle-sensor (crankshaft position sensor) — what it does and how to look after it

Based on Lexus/Toyota technical publications for the IS range (Lexus IS 250/350/IS F Repair Manual – SFI/Engine Control sections detailing DTCs P0335–P0339, and the Lexus/Toyota Electronic Parts Catalogue for 4GR‑FSE, 2GR‑FSE and 2UR‑GSE engines), the 2010 Lexus IS is fitted with a crankshaft position sensor, commonly referred to in Toyota literature as a crank‑angle‑sensor. This sensor is fundamental to the engine management on petrol and diesel variants alike.

On the 2010 IS, the crank‑angle‑sensor tracks the exact position and rotational speed of the crankshaft via a toothed reluctor wheel. It feeds that signal to the ECU so the car can fire the spark and inject fuel at precisely the right moment, manage variable valve timing, and monitor for misfire. It works hand‑in‑hand with the camshaft position sensors to keep timing bang on, whether it’s idling in Auckland traffic or overtaking on a country road.

This isn’t a scheduled service item, but it pays to give it some attention during major services, especially as kilometres climb. Under the bonnet, check the sensor connector and engine harness for oil contamination, brittle insulation, or chafing. Because the sensor is magnetic, fine metal particles can cling to the tip, if access allows, a careful clean can help signal quality. Oil leaks from cam covers or the rear main can also migrate onto the connector—worth sorting before they cause dramas.

Common warning signs of a crook crank‑angle‑sensor include intermittent no‑start, stumbling or stalling when hot, erratic tachometer behaviour, rough running, and a Check Engine Light with codes like P0335 or P0339. If any of those pop up, organised diagnosis with a proper scan tool and a scope test of the sensor waveform is the smart next step.

Replacement is straightforward for a competent home mechanic with axle stands and a decent spanner set: disconnect the battery, access the sensor on the block, unplug the connector, remove the retaining bolt, and ease out the sensor. Always fit a fresh O‑ring, lightly oil it, seat the new sensor fully, and tighten the bolt to the factory spec. Clear any fault codes and road‑test to confirm clean starts and stable idle. For best reliability, stick with genuine or high‑quality aftermarket parts—cheapies can cause intermittent faults that’ll drive anyone spare.

• Tip: After replacement, some vehicles may idle slightly differently for a short time while the ECU trims relearn—totally normal.

FAQs

Where is the crank‑angle‑sensor on a 2010 Lexus IS?
It’s mounted to the engine block aimed at a toothed wheel on the crankshaft. On many V6/V8 IS models it sits near the rear of the block by the bellhousing, diesel layouts may place it closer to the front pulley. Access is usually easier from underneath.

Does the crank‑angle‑sensor need regular replacement?
No. It isn’t a routine service item. Inspect the connector and wiring during major services and replace only if faulty or contaminated. Many last well past 150,000 km when kept clean and dry.

Is it safe to drive with a failing crank‑angle‑sensor?
Not really. A failing sensor can cause sudden stalling or a no‑start, which is risky and inconvenient. If symptoms or fault codes appear, it’s best to diagnose and repair promptly.