Parts for your 2019 Lexus Is-Crank angle sensor

2019 Lexus IS crank-angle sensor: what it does and how to look after it

Technical documentation confirms the 2019 Lexus IS does use a crank-angle sensor (commonly called a crankshaft position sensor or CKP). The Lexus/Toyota Repair Manual for IS models (2017–2020) includes DTCs P0335/P0336 for the crankshaft position sensor “A” circuit, outlining inspection and replacement procedures. Lexus technical training for the 8AR‑FTS (2.0L turbo) and 2GR‑FKS (3.5L V6) engines describes the CKP “NE” signal as critical for ignition and fuel injection timing, and the Toyota/Lexus Electronic Parts Catalogue lists the crankshaft position sensor as a service part for 2019 IS variants. That makes the crank-angle sensor relevant and fitted across IS300 (8AR‑FTS), IS350 (2GR‑FKS) and IS300h hybrid models.

The crank-angle sensor is the engine’s timekeeper. It watches the crankshaft’s speed and exact position, feeding a waveform back to the engine control module so it can fire the coils and injectors at precisely the right moment. Without that signal, the IS will be hard to start, run rough, or not run at all. It’s a solid-state Hall or magneto-resistive sensor reading a toothed reluctor on the crank, usually mounted at the block or timing cover.

For servicing, it’s not a scheduled replacement item, it’s inspected and replaced only on fault. Typical warning signs include:

• Intermittent no‑start or sudden stalling once warm
• Misfire, poor acceleration, or the engine going into limp mode
• Check Engine Light with codes like P0335/P0336

Good workshop practice on a 2019 IS is to check the sensor connector for oil intrusion or corrosion, confirm harness routing away from hot exhaust and sharp edges, and inspect for engine oil leaks that can wick into the plug. If replacement is needed, genuine or quality OEM‑equivalent parts are recommended to maintain clean signal quality. Replacement is straightforward for a trained tech: disconnect the battery, access the sensor at the block/timing cover, remove its retaining bolt, lubricate and seat the new O‑ring, and torque to the factory spec from the Lexus Repair Manual. No special “relearn” is typically required, the ECM immediately uses the new signal. After fitting, clear any codes and verify live CKP data and synchronisation with the cam sensors.

Owners keen to extend sensor life can keep to regular oil services to minimise leaks, ensure the engine under‑tray is secured to reduce water splash on connectors, and have any drivability fault scanned promptly before heat or vibration worsens a marginal signal.

Popular questions

Where is the crank-angle sensor on a 2019 Lexus IS?
On IS300 (8AR‑FTS) and IS300h models it’s typically mounted to the engine block near the crankshaft, reading a toothed wheel inside the lower timing area. On the IS350 (2GR‑FKS) it’s similarly located at the front lower timing cover region. Exact placement varies by engine, so a quick look-up in the Lexus service manual or a visual trace from the crank pulley area helps pinpoint it.

Access is usually from above or below with the under‑tray off. A small single bolt holds the sensor, the electrical connector faces outward for service.

Does the crank-angle sensor need periodic replacement?
There’s no set interval. It’s a “replace on failure” component monitored by the ECM. If it’s working and the wiring’s healthy, it stays in service for many years. If faults like P0335/P0336 pop up or symptoms appear, testing and replacement are the go.

During regular servicing, a quick visual of the connector and nearby wiring is worthwhile, especially on vehicles driven in wet or dusty conditions.

Is it safe to drive with a failing crank-angle sensor?
Not ideal. A marginal sensor can cause intermittent stalling or a no‑start, which isn’t fun at the lights or out on the motorway. If the IS shows CKP‑related codes or stalls, it’s best to arrange diagnosis and repair before it leaves them stranded.

Short trips to a workshop may be possible if the engine still runs, but towing is smarter if the engine stalls or won’t restart.