Parts for your 2002 Lexus Is-Crank angle sensor

2002 Lexus IS crank angle sensor: what it does, where it lives, and how to keep it happy

Based on factory documentation and standard Toyota/Lexus diagnostics, the 2002 Lexus IS does indeed use a crank angle sensor (labelled “Crankshaft Position Sensor” in Lexus/Toyota literature). Technical sources that confirm this include the Lexus/Toyota Repair Manual for the 2002 IS (Engine Control – SFI system), the 2002 IS Electrical Wiring Diagram (showing the CKP/“NE” signal to the ECM), Toyota’s Electronic Parts Catalogue for the IS200 (1G‑FE) and IS300 (2JZ‑GE), and the OBD‑II DTC list that includes P0335/P0339 for the CKP circuit. So, it’s absolutely relevant and fitted on both IS200 and IS300 models.

On a 2002 Lexus IS, the crank angle sensor is the ECM’s timekeeper. It reads a toothed wheel on the crankshaft and sends precise position and speed signals so the computer can fire the injectors and coils at the right moment. If that signal goes missing or messy, the car can be hard to start, run rough, or stall. On the IS200’s 1G‑FE and the IS300’s 2JZ‑GE, the sensor is mounted at the front of the engine near the crank pulley/timing cover and plugs into the engine loom with a simple two‑pin connector.

It’s not a scheduled replacement item, but it’s worth a quick inspect during major services—especially as kilometres climb and heat cycles add up. A sensible plan is to check the connector and wiring for oil weep, brittleness, or green corrosion whenever the front of the engine is accessible. Keep the area clean so grit doesn’t sit around the sensor’s O‑ring.

Common clues the sensor is on the way out include:

• Crank/no‑start when hot, then it fires up again once cooled
• Random stalling at idle or low speed
• Misfire and limp‑home behaviour with the MIL on (often logging P0335/P0339)

Replacement is straightforward for a trained tech and very manageable for confident home mechanics. Under the bonnet, disconnect the battery, unplug the connector, remove the retaining bolt, and gently twist the sensor free. Lightly oil the new O‑ring, seat the new sensor squarely, and refit the bolt and plug. Route the harness exactly as the factory did, clear any codes, and confirm stable RPM and timing data on a scan tool. Avoid aftermarket no‑name sensors, genuine or high‑quality OEM‑equivalent units tend to give the most reliable signal quality. If there’s oil inside the connector, track down the source—usually a weeping timing cover or aged seal—so it doesn’t foul the new sensor. No special maintenance beyond periodic inspection is needed, but pairing sensor replacement with fresh drive belts and a front‑end tidy‑up is a tidy bit of preventative care for Aussie and Kiwi IS owners.

Where is the crank angle sensor on a 2002 Lexus IS?

It’s mounted at the front of the engine near the crank pulley and lower timing cover. On both the 1G‑FE (IS200) and 2JZ‑GE (IS300), the sensor reads a toothed wheel on the crankshaft and connects via a short two‑pin plug into the engine harness. Access is typically from above with the bonnet open, removing the engine undertray can help visibility from below.

What are the signs it’s failing?

Look for hot no‑start that clears after cooling down, random stalling, or a rough idle with the Check Engine light on. A scan tool often shows codes like P0335 (Crankshaft Position Sensor “A” circuit). Intermittent RPM dropouts in live data are another giveaway. Always check the plug and wiring before condemning the sensor.

Does the ECU need a relearn after replacement?

There’s no special crank relearn procedure on these models. After fitting the new sensor, clear fault codes and let the engine idle until warm so the ECU trims settle. If the battery has been disconnected, a brief idle and drive cycle helps the ECM refine fuel trims and idle control.