Parts for your 2008 Lexus Is-Crank angle sensor

2008 Lexus IS crank-angle sensor: what it does and when to replace it

On the 2008 Lexus IS range (IS250 4GR‑FSE, IS350 2GR‑FSE, IS F 2UR‑GSE and IS220d 2AD), a crank-angle sensor is fitted. Toyota/Lexus service literature refers to it as the Crankshaft Position Sensor (CKP), generating the NE signal for the ECM alongside the camshaft position sensors. This is documented in the Lexus IS250/IS350 Repair Manual (SFI System, DTC P0335–P0339) and corresponding Lexus IS F and 2AD diesel engine manuals, as well as the Toyota Electronic Parts Catalogue that lists a CKP for these engines. So it’s absolutely relevant on a 2008 IS.

For this model, the crank-angle sensor’s whole job is to tell the engine computer exactly where the crankshaft is and how fast it’s turning. That timing info is crucial for spark, fuel injection and VVT-i control. Lose that signal and the engine may crank without firing, stumble, or throw the car into limp mode. It’s a small, sealed magnetic sensor reading a toothed wheel on the crank, paired with the cam sensors, it lets the ECM sync injection and spark on the money.

It isn’t a scheduled service item, but it benefits from a quick look whenever the undercovers are off: check the connector for oil wicking, brittle wiring, or green corrosion, and make sure leaks from the front or rear main seal aren’t soaking it. Typical warning signs are a long crank when hot, random stalling at idle, unstable tacho, or a check engine light with codes like P0335. If those pop up, a scan and live-data check for a clean RPM signal is the go.

Replacement is straightforward for a competent tech: disconnect the battery, safely raise the vehicle, remove the engine under cover if needed, unplug the sensor, take out the retaining bolt and ease the sensor from the block. A new O‑ring should be lightly oiled and seated cleanly. After refitting, clear fault codes and let the ECM relearn idle. It’s worth sticking with quality OEM or OE-equivalent sensors, cheapies can give flaky signals that drive the ECM—and the driver—spare.

Owners in Australia and New Zealand will often see labour at about half to one hour, depending on engine variant and workshop setup. Given how mission‑critical the signal is, treating any CKP fault promptly saves headaches, fuel and potentially a tow.

• Common symptoms: no start when hot, intermittent stall, rough idle, CEL with P0335–P0339
• Good practice: inspect connectors, fix oil leaks, replace O‑ring with the sensor

Popular questions

Does a 2008 Lexus IS actually have a crank-angle sensor?
Yes. Lexus calls it the Crankshaft Position Sensor (CKP). Factory repair manuals for the 4GR‑FSE, 2GR‑FSE, 2UR‑GSE and 2AD engines describe the CKP providing the NE signal and list related DTCs (P0335–P0339). It’s essential for starting, spark, fuel and VVT‑i control.

What are the signs the crank-angle sensor is failing on a 2008 IS?
Long cranking, especially hot, sudden stalls at idle or low speed, a dead tacho during no‑start, poor fuel economy and a check engine light are common. A scan tool will often show P0335 and an erratic or missing RPM signal during cranking.

Can it be cleaned, or does it need replacing?
The sensor is sealed, if the tip has light debris, a careful wipe won’t hurt. If there’s internal failure or wiring damage, replacement is the fix. Always address oil leaks that may contaminate the connector, and use a new O‑ring on install.