Parts for your 2001 Toyota Avensis-Crank angle sensor

2001 Toyota Avensis crank-angle sensor — what it does and how to look after it

Yes, the 2001 Toyota Avensis is fitted with a crank-angle sensor (Toyota refers to it as the Crankshaft Position Sensor, signal “NE”). This is documented in Toyota’s Technical Information System (TIS) for the Avensis T22 (Engine Control section and the 2001 Electrical Wiring Diagram), and is also covered in commonly used trade references such as Autodata Service & Repair and the Haynes Avensis 1997–2003 manual. It’s relevant to all the common 2001 Avensis engines, including the 1.6 3ZZ-FE, 1.8 1ZZ-FE, 2.0 1AZ-FSE, and 2.0 D-4D 1CD-FTV.

In day-to-day terms, this little sensor tells the engine computer exactly where the crankshaft is in its rotation and how fast it’s spinning. That info is the backbone for spark timing, fuel injection timing, and even for firing the coils on time. If it goes out of whack, the Avensis can be hard to start, run rough, stall, or not run at all. It’ll usually throw OBD-II fault codes like P0335–P0339, and you may notice no RPM signal on a scan tool when cranking.

As part of routine servicing, the crank-angle sensor isn’t a scheduled replacement item, but it’s smart to give it a once-over when you’re under the bonnet:

• Check the sensor plug and loom for heat damage, brittle insulation, or oil saturation.
• Look for oil leaks at the front cover that could contaminate the sensor.
• If removed, inspect the O-ring and replace it to prevent future leaks.

Location varies slightly by engine: on the 1ZZ-FE and 3ZZ-FE it’s at the timing chain cover near the crank pulley, on the 1AZ-FSE it’s mounted at the front of the block, on the 1CD-FTV diesel it’s also at the timing cover. Replacement is generally straightforward (often 0.5–1.0 hr): disconnect the battery, unplug the connector, remove the retaining bolt, swap the sensor, lightly oil a new O-ring, refit, and torque the bolt to spec. No special relearn is typically needed on these Toyotas—clear codes, then check live data and road test.

Use a quality sensor (Denso or equivalent OE) to avoid false triggers or poor hot starting. If you’re chasing intermittent stalling or a no-start, confirm power, ground, and signal at the ECM, and don’t forget to check the cam sensor and timing-chain condition, as they work hand-in-glove for accurate timing.

Popular questions

Does a 2001 Avensis have a crank-angle sensor and where is it?

Yes. All common 2001 Avensis engines use a crank-angle (crankshaft position) sensor. It’s typically mounted at the timing cover near the crank pulley on the petrol engines (3ZZ-FE, 1ZZ-FE, 1AZ-FSE) and similarly placed on the 2.0 D-4D (1CD-FTV). Look for a small two- or three-pin sensor with a single retaining bolt.

What are the symptoms of a failing crank-angle sensor on this model?

Hard starting, random stalling, rough idle, misfires, lack of power, and a dead tach signal when cranking are common. The check engine light often logs codes P0335–P0339. Heat-soak faults that appear after a hot run are another giveaway.

Can it be driven with a dodgy crank-angle sensor?

It might run, but it can cut out unexpectedly or refuse to restart when hot. That’s unsafe and can leave the driver stranded. Best bet is to test it promptly and replace it with an OE-quality part if confirmed faulty.