Parts for your 2011 Toyota Bb-Camshaft sensor

2011 Toyota bB Camshaft Sensor — Purpose, Fitment, and Service Advice

Based on technical references including Toyota service manuals, the Toyota Electronic Parts Catalogue, and Daihatsu/Toyota engine documentation for the K3-VE and 3SZ-VE engines used in the 2011 Toyota bB (QNC20/21/25), this model is fitted with a camshaft position sensor (CMP). These sources also reference related diagnostic trouble codes such as P0340/P0341 for the camshaft position circuit, confirming the sensor’s role in engine management. On these engines, the CMP is mounted on the cylinder head (intake cam side), reading a timing target to inform the ECU.

The camshaft sensor on a 2011 Toyota bB works with the crank sensor to tell the ECU exactly where the cam is relative to the crank. That lets the ECU time fuel injection and ignition properly, and manage VVT-i phasing for smooth power and good fuel economy. When the sensor signal goes missing or messy, the bB can be hard to start, run rough, or drop into limp mode, and it’ll usually light the check engine lamp.

While the camshaft sensor isn’t a routine “wear-and-tear” service item, it’s smart to keep an eye on it during scheduled servicing:

• Look for oil seepage at the sensor body or O-ring under the bonnet, replace the O-ring if it’s weeping.
• Check the connector for brittle plastics, green corrosion, or oil intrusion, clean and secure the plug.
• If the engine shows hard starts, misfires, poor fuel use, or DTCs like P0340/P0341, have the CMP circuit tested.

Replacement is straightforward on the bB. After disconnecting the battery, unplug the connector, remove the retaining bolt, and ease out the sensor. Fit a new O-ring, lightly oil it, seat the new sensor, and tighten the bolt to a light spec (around 8–10 N·m is typical for this size fastener, always follow the correct spec for the exact engine). Clear codes and perform a start and road test. Quality matters here—genuine or reputable aftermarket sensors provide stable signal and long life. Keeping engine oil clean and at the right level also helps, as sludgy oil can upset VVT-i operation and timing correlation that depends on a clean CMP signal.

For owners clocking up big kilometres around Australia or New Zealand, a quick visual check each service and prompt action on any warning light will keep the bB’s petrol engine humming along nicely.

Popular questions about the 2011 Toyota bB camshaft sensor

Does a 2011 Toyota bB have a camshaft sensor?
The 2011 bB does have a camshaft position sensor. The K3-VE and 3SZ-VE engines use the sensor for fuel, spark, and VVT-i control. It’s located on the cylinder head near the timing chain end.

What are the symptoms of a failing camshaft sensor on a bB?
Common signs include hard starting, rough idle, hesitation, poor fuel economy, and the check engine lamp on with codes like P0340 or P0341. It may also feel down on power as the ECU falls back to a safe strategy.

Is it safe to drive with a bad camshaft sensor?
Usually the car will run, but it can stall, be sluggish, and use more fuel. Driving for long with a faulty sensor isn’t recommended, organise a proper diagnosis and repair to avoid further issues and get the timing back spot-on.