Parts for your 2011 Toyota Bb-Crank angle sensor

2011 Toyota bB crank angle sensor

Based on Toyota and Daihatsu service literature for the QNC20/21 bB platform, the 2011 Toyota bB is fitted with a crank angle sensor (also called a crankshaft position sensor or CKP). Technical references include the Toyota bB (QNC2#) repair manual, Toyota Electronic Parts Catalogue for the bB, and the Daihatsu K3-VE/3SZ-VE engine mechanical manuals used in this model range. These documents describe the NE (crank) signal used by the ECM for ignition timing and fuel injection, confirming the sensor’s presence and function on 1.3 and 1.5 petrol engines used in the 2011 bB.

On this model, the crank angle sensor’s job is to tell the engine computer exactly where the crankshaft is and how fast it’s spinning. That precise timing lets the ECM fire the coils and injectors bang-on, which keeps starting crisp, idle smooth, fuel use tidy, and emissions compliant. Under the bonnet it’s typically mounted at the front of the engine near the crank pulley/oil pump housing, reading a reluctor on the crank.

It isn’t a regular “service item”, but it’s worth checking whenever there are hard-start complaints or a check engine light with codes like P0335–P0339. Common signs of a crook CKP include long cranking, intermittent stalling, misfires, rough idle, and no tach signal on a scan tool during crank. On the bB’s engines, heat and oil mist can age the sensor and its connector, and loom chafe near mounts can also cause grief.

• Basic checks: scan for DTCs, watch live RPM during crank, and inspect the plug and wiring for oil ingress or broken insulation.
• Replacement tips: disconnect the battery, remove the retaining bolt, twist the sensor gently to break the O-ring seal, and keep the sensor nose clean. Lightly oil the new O-ring, seat squarely, and torque the bolt to spec from the workshop manual.
• After fitting: clear codes, confirm clean RPM signal, and road test. If faults persist, scope-testing the NE waveform and checking the trigger wheel for damage is the next step.

Genuine or quality OEM-equivalent sensors tend to behave best on these engines. There’s no set kilometre interval—just address it when symptoms or fault codes show up, and it’ll save heaps of head-scratching later.

Popular questions

Where is the crank angle sensor on a 2011 Toyota bB?
It’s typically at the front of the engine, near the crank pulley/oil pump area, reading a toothed wheel on the crankshaft. Access is from under the bonnet, on some variants it’s easier from underneath with the splash guard off.

What are the signs the bB’s crank angle sensor is failing?
Hard starting, random stalling, rough idle, misfires, poor fuel economy, and a check engine light. Scan tools may show no RPM during cranking, and codes such as P0335 may be stored.

Does the crank angle sensor need regular servicing?
No scheduled replacement. It’s serviced as-needed: inspect connectors and wiring for oil, corrosion, or damage, and replace the sensor if it’s out of spec or logging faults.