Parts for your 2014 Toyota Vitz|yaris-Camshaft sensor

2014 Toyota Vitz/Yaris Camshaft Sensor — what it is, why it matters, and when to replace it

Yes, the 2014 Toyota Vitz/Yaris uses a camshaft position sensor. Technical sources including Toyota’s Repair Manual/Engine Control (SFI) section for NSP130/NCP131 models, the Toyota Electrical Wiring Diagram for Vitz/Yaris (2014), and the New Car Features documents for the 1NR‑FE and 1NZ‑FE engines all show a dedicated camshaft position sensor signal to the ECM (often labelled “G” or “G2”) and related diagnostic codes P0340/P0341. These systems rely on both a crankshaft and a camshaft signal to manage sequential fuel injection and Dual VVT‑i cam timing, so the sensor is absolutely relevant and fitted on this model.

On the 2014 Vitz/Yaris, the camshaft sensor tells the engine computer exactly where the camshaft is each cycle. That timing info lets the ECM fire the injectors in sequence, trim ignition timing, and control VVT‑i for smooth torque and good fuel economy. If the signal goes missing or messy, the car may still run on the crank signal as a fallback, but owners will notice harder starting, lazier throttle response, and worse fuel use. It’s a small, clever bit of kit that keeps the 1.3‑litre or 1.5‑litre running sweet as under town and motorway driving.

• Common symptoms of a failing camshaft sensor:
  • Long crank or no start when warm
  • Rough idle, hesitation, or flat spots
  • Check Engine Light with P0340/P0341
  • Sluggish performance and poorer fuel economy
  • Intermittent stalling or misfire feel

Routine servicing doesn’t normally include replacing the cam sensor, but a quick look each service is smart. Keep the connector clean and the loom supported near the rocker cover, oil weep or brittle wiring can cause false faults. If replacement is needed, use an OE‑quality sensor and a fresh O‑ring. Disconnect the battery, unplug the connector, remove the retaining bolt, and gently twist the sensor out. Lightly oil the new O‑ring, seat the sensor fully, tighten the bolt to the workshop‑manual spec, then clear codes and warm the engine so the ECM can relearn idle and cam timing trims. Keeping oil changes on time with the correct grade helps prevent sludge and metallic debris that can upset sensor signals, especially on engines with long city cycles.

Popular questions about 2014 Toyota Vitz/Yaris camshaft sensors

Where is the camshaft sensor on a 2014 Vitz/Yaris?
The sensor sits on the cylinder head at the timing chain end, near the upper timing cover. On the 1NR‑FE it’s typically on the intake side, on the 1NZ‑FE it’s in a similar spot, easy to reach from under the bonnet.

Can it be driven with a faulty camshaft sensor?
It might start and run using the crank sensor as backup, but expect long cranking, reduced power, and higher fuel use. There’s also a risk of stalling. Best to sort it promptly to avoid getting caught out.

Does a new camshaft sensor need programming?
No special programming is usually required. Clear any fault codes, start the engine, and let it warm up so the ECM relearns. If a code returns, check wiring, oil contamination, and confirm the correct part was fitted.