Parts for your 2015 Lexus Is-Crank angle sensor

2015 Lexus IS crank angle sensor: what it does and how to look after it

Based on Lexus Technical Information System (TIS) repair manuals, the New Car Features (NCF) guides, and the Toyota/Lexus Electronic Parts Catalogue for the 2015 IS range (IS250 4GR‑FSE, IS350 2GR‑FSE, and IS300h 2AR‑FSE), this model is fitted with a crank angle sensor, officially listed as the crankshaft position sensor (CKP). These factory sources detail the CKP’s role, related DTCs such as P0335–P0339, and its installation on each engine family, confirming it’s an essential part on all 2015 Lexus IS variants.

On a 2015 Lexus IS, the crank angle sensor is the quiet achiever that lets the engine management know exactly where the crankshaft is at any moment. By reading a toothed reluctor wheel on the crank, it provides precise speed and position data so the ECU can fire the spark and inject fuel at the right time. It’s also crucial for variable valve timing control and for detecting misfires. Without a clean, accurate signal, the car can be hard to start, run rough, or stall once warm.

It’s not a scheduled service item, so there’s no routine replacement interval. As part of normal servicing, it’s smart to check for oil seepage at the sensor’s O‑ring, inspect the connector for corrosion, and make sure the wiring isn’t rubbing on the block or exhaust. If the MIL’s on with codes like P0335 or there are no‑start dramas, extended cranking, or intermittent stumbles, the CKP and its wiring are prime suspects.

Replacement is usually straightforward for a competent technician. After making the car safe and disconnecting the battery, the sensor is removed with a single retaining bolt, the O‑ring is renewed, and the new unit is seated cleanly and torqued to factory spec. On V6 models it’s typically accessed low on the block near the transmission bellhousing, on the IS300h 2AR‑FSE it’s usually forward on the timing cover. A quick visual of the tone wheel through the port (where possible) and a scope or scan‑tool check of signal quality after installation helps avoid repeat faults. Clear the codes, verify warm and cold starts, and confirm there’s no oil leak around the sensor body. Using quality OEM‑spec parts and keeping the harness clipped away from heat will keep the 2015 IS happy for many kilometres.

• Common signs: hard/no start, rough idle, random stalling when hot, MIL with P0335–P0339.
• Good practice: renew the O‑ring, route the loom properly, and confirm signal with a scan tool.

Where is the crank angle sensor on a 2015 Lexus IS?
The location varies by engine. On the IS250/IS350 V6, it’s generally low on the rear of the engine near the bellhousing. On the IS300h 2AR‑FSE, it’s commonly on the front timing cover near the crank pulley. Access can be tight, so lifting the vehicle and removing undertrays often helps. A workshop manual wiring diagram and component location view are handy for quick spotting under the bonnet.

What symptoms point to a failing crank angle sensor?
Expect longer cranking, occasional no‑start when hot, misfires, sudden stalling at idle, and the check engine light. Scan tools often reveal DTCs like P0335. Because wiring heat‑soak and oil contamination can mimic sensor issues, a visual inspection and a live‑data check of engine speed during cranking are worth doing before parts are swapped.

Does it need routine replacement, and how long does the job take?
There’s no routine interval, it’s replaced on condition. If diagnosed faulty, a technician will typically need 0.5–1.5 hours depending on engine and access. Using an OEM‑quality sensor and a fresh O‑ring, then clearing codes and verifying hot and cold starts, usually has the Lexus back on the road with no dramas.