Parts for your 2010 Toyota Vitz|yaris-Camshaft sensor

2010 Toyota Vitz/Yaris Camshaft Sensor: what it does and how to look after it

Yes, the 2010 Toyota Vitz/Yaris does use a camshaft position sensor. Toyota’s own service literature for the XP90 series (2005–2011) — including the Yaris/Vitz Repair Manual (Engine Control), the Electrical Wiring Diagram (EWD) for NCP9x models, and the New Car Features manuals for the 1KR‑FE, 2NZ‑FE and 1NZ‑FE engines — details a dedicated camshaft position sensor (often labelled CMP or G2) feeding the engine control module. The same documents define DTCs P0340 and P0343 for this platform, which only exist if a camshaft sensor is fitted and monitored.

On the 2010 Vitz/Yaris, the camshaft sensor keeps the engine computer in sync with the intake cam’s position so it can fire fuel injectors in sequence, trigger the coils at the right moment, and command VVT‑i accurately. It also helps the engine start cleanly by telling the ECU which stroke each cylinder is on. If the signal goes missing or erratic, the car may default to a backup mode using the crankshaft sensor alone, which can mean slower starting, rough idle, less pep and higher fuel use — and the check engine light will join the party.

There’s no scheduled replacement for the camshaft sensor, it’s a fit‑and‑forget item until it fails or its signal is compromised. As part of normal servicing, it’s smart to eyeball the sensor’s connector for broken tabs, corrosion or oil wicking in the loom, and to check the rocker cover area for weeping that could seep onto the sensor. A weak battery or poor grounds can mimic sensor faults, so rule those out before condemning the part.

• Common clues: hard or long cranking, uneven idle, flat spots on acceleration, worse economy, and fault codes like P0340/P0343.
• Quick checks: secure plug, clean terminals, sound harness routing clear of the timing chain cover and hot exhaust.

If replacement is needed, a competent home mechanic can usually handle it under the bonnet: disconnect the battery, unplug the sensor at the cylinder head’s timing chain end, remove the retaining bolt, twist and pull the sensor free, lightly oil the new O‑ring, refit, and reconnect. Clear codes and confirm a clean cam/crank correlation with a scan tool after a short drive. Stick with quality OEM‑equivalent parts and always follow the Toyota repair manual procedure and torque specs for the specific engine in the car.

Where is the camshaft sensor on a 2010 Vitz/Yaris?

It’s mounted on the cylinder head at the timing chain end of the engine, typically near the intake cam. On the XP90 it’s reachable from above once the engine cover is off, with a single retaining bolt and a two‑pin or three‑pin connector.

What fault codes point to a camshaft sensor issue?

Expect the check engine light with codes such as P0340 (Camshaft Position Sensor Circuit) or P0343 (Camshaft Position Sensor Circuit High). Related VVT‑i timing codes can also appear if the ECU can’t trust the cam signal.

Should it be replaced as preventive maintenance?

No. The sensor isn’t a consumable. Replace it only if it’s faulty or contaminated, but do inspect the connector and nearby oil seals during routine services to catch issues early.