Parts for your 2010 Toyota Bb-Crank angle sensor

2010 Toyota bB crank-angle sensor — what it does and how to look after it

Yes, the 2010 Toyota bB does use a crank-angle sensor (more commonly called a crankshaft position sensor). Technical sources including the Toyota bB QNC20/21 series repair manual (Toyota TechInfo/TechDoc), the Toyota Electronic Parts Catalogue, and Daihatsu engine documentation for the 3SZ-VE and K3-VE engines all specify a CKP/crank-angle sensor in the engine control system. These sources show the sensor reading a toothed reluctor on the crank to feed precise engine speed and position to the ECU, with diagnostic coverage via DTCs such as P0335–P0339.

On the 2010 bB, this sensor is the ECU’s timekeeper. It tracks crank position and rpm so the ECU can fire the coils and injectors at the right moment, and it works in tandem with the cam sensor to sync fuel and spark on start-up. If the crank-angle sensor signal drops out, the bB can crank but not start, stall suddenly, or run rough with poor fuel economy.

This part isn’t a scheduled service item, but it’s smart to give it a once-over during regular servicing. Check the connector for oil ingress or green corrosion, ensure the harness isn’t chafed, and wipe away any metallic fuzz on the sensor tip if accessible. Oil leaks near the front or rear main seal can contaminate the sensor, sort the leak and replace the sensor’s O-ring if it’s weeping.

Replacement is usually straightforward and typically under an hour: disconnect the battery, unplug the connector, remove the retaining bolt, twist the sensor free, lightly oil a new O-ring, and refit, torquing to factory spec. Keep the mounting face clean so the air gap to the reluctor wheel stays within spec, and never shim the sensor. After installation, clear any codes and take the car for a normal warm-up drive, the ECU generally doesn’t need a special relearn on these engines.

Common clues it’s time to test or replace include intermittent no-start, sudden stalls at idle, tachometer dropouts, and stored codes P0335/P0336. Because faults can mimic a failing sensor, a quick scope check or live-data rpm check is worthwhile before throwing parts at it.

• Recommended practice: use quality OEM-equivalent sensors, renew the O-ring, and inspect the harness routing for rub points.
• If issues persist after replacement, inspect the crank reluctor wheel and engine grounds.

Popular questions

Where is the crank-angle sensor on a 2010 Toyota bB?
The sensor is mounted to the engine block reading a toothed wheel on the crankshaft. On many 3SZ-VE cars it’s low on the block near the front pulley, some K3-VE variants place it toward the transmission side. From under the car, look for a small two- or three-wire sensor held by a single bolt.

What are the symptoms of a failing crank-angle sensor on a bB?
Hard starting or no-start, random stalling, rough running, poor fuel economy, and the check engine light are typical. Scan tools may show P0335–P0339, and live data may show rpm dropping to zero even while the engine is still spinning.

Does the crank-angle sensor need regular servicing or calibration?
There’s no scheduled replacement or calibration. Keep the connector clean and dry, fix any nearby oil leaks, and ensure the sensor sits flush so the air gap is correct. After replacement, clearing codes and a normal road test is usually all that’s required.