Parts for your 2009 Toyota Bb-Crank angle sensor

2009 Toyota bB crank angle sensor: purpose, service and replacement

Based on factory service literature, the 2009 Toyota bB is fitted with a crank angle sensor (commonly called a crankshaft position sensor or “NE” signal in Toyota/Daihatsu documentation). This component is integral to engine management on the QNC2# bB models fitted with the K3-VE (1.3L) or 3SZ-VE (1.5L) VVT-i engines.

• Technical sources referenced: Toyota bB (QNC2#) Electrical Wiring Diagram – Engine Control (ECM inputs include Crankshaft Position Sensor “NE”).
• Toyota/Daihatsu Engine Control diagnostics (DTC P0335 series for CKP/NE circuit on K3-VE/3SZ-VE).
• Daihatsu K3-VE/3SZ-VE Engine Repair Manual – component layout and function of the crankshaft position sensor.

On this bB, the crank angle sensor tells the engine computer exactly where the crank is in its rotation and how fast it’s spinning. That data is used to time spark, fire the injectors, coordinate VVT-i, and detect misfires. If the sensor drops out, the engine may crank but not start, or it may stumble, stall, or throw a check-engine light. It’s not a “nice-to-have”, it’s essential.

There’s no scheduled replacement for the crank angle sensor. It’s a solid-state part and is generally replaced only if faulty. During routine servicing, it’s smart to:

• Visually check the sensor body and wiring near the lower front of the engine (by the crank pulley/timing cover on these engines) for oil contamination, chafing, or loose connectors.
• Clean any light debris from the magnetic tip and ensure the connector pins are clean and tensioned.
• Address oil leaks promptly, as hot oil can shorten sensor and harness life.

Tell-tale symptoms of a failing sensor on a 2009 bB include hard starting or no start when hot, intermittent stalling at idle, a dead tach during crank, rough running, and fault codes such as P0335. Because these engines rely on precise timing, even a momentary dropout can feel like a big misfire.

Replacement is straightforward for a trained tech. Use quality OEM-equivalent (e.g., Denso) to keep the signal clean and consistent. Fit a new O-ring, lightly oil it, seat the sensor squarely, and tighten the retaining bolt to the correct light torque (small M6 bolts are typically around 8–10 N·m). After replacement, clear codes and confirm stable RPM and timing data. No special maintenance reset is usually required, but it’s good practice to perform an idle learn if the battery has been disconnected.

For owners in Aus and NZ, many 2009 bB vehicles are JDM imports, whether K3-VE or 3SZ-VE, the above checks and replacement approach apply the same.

Popular questions about the 2009 Toyota bB crank angle sensor

Does the 2009 Toyota bB have a crank angle sensor and where is it located?
Yes. The QNC2# bB with K3-VE or 3SZ-VE engines uses a crank angle (crankshaft position) sensor. It’s typically mounted low on the engine near the crank pulley/timing cover, reading a toothed wheel on the crank. Some variants place it at the block near the bellhousing.

What are common symptoms of a failing crank angle sensor on a 2009 bB?
Common signs include no start or hard start (especially when hot), random stalling, rough idle, a sudden drop of the tacho, and a check-engine light with codes like P0335. Fuel economy and drivability can suffer because ignition and injection timing go off.

Is the crank angle sensor a maintenance item on the 2009 bB?
It isn’t scheduled for periodic replacement. It’s inspected during routine servicing and replaced only if faulty. Keeping oil leaks in check and the connector clean helps the sensor last the distance.