Parts for your 2018 Toyota Vitz|yaris-Camshaft sensor

2018 Toyota Vitz/Yaris Camshaft Sensor: what it is, why it matters, and how to look after it

Based on Toyota’s technical literature, the 2018 Toyota Vitz/Yaris does use a camshaft position sensor. The Toyota Repair Manual (Engine Control section detailing the Camshaft Position Sensor), the Toyota Electronic Parts Catalog for NCP130/NSP130/KSP130 (petrol) and NHP130 (hybrid) variants listing “Sensor, Cam Position,” and Toyota’s New Car Features documents for the NR-, NZ-, and 1KR-series engines (with Dual VVT-i) all confirm the sensor is fitted and integral to engine management.

On this model, the camshaft sensor (often called CMP) tells the engine control module exactly where the camshaft sits relative to the crankshaft. That’s crucial for sequential fuel injection, accurate spark timing, and managing Dual VVT‑i phasing for smooth torque, good fuel economy, and tidy emissions. If the sensor signal drops out or goes skew-whiff, the Vitz/Yaris can be slow to start, run rough, lose power, and switch on the check engine light with codes like P0340/P0341. The ECM may default to a back‑up strategy, but drivability and economy cop it.

There’s no scheduled replacement for the camshaft sensor, it’s a fit‑and‑forget item that’s replaced only if faulty. Good, clean engine oil is the quiet achiever here: sticking to the service interval (commonly 12 months/15,000 km in AU/NZ conditions unless otherwise specified) helps keep VVT oil control happy and reduces the chance of oil contamination at the sensor and connector. During routine servicing, a quick look under the bonnet for brittle loom tape, chafed wiring near the timing cover, or oil weeping into the sensor plug is time well spent.

• Common symptoms of a crook cam sensor: hard starting, rough idle, flat spots, poor fuel use, and the MIL/engine light on.
• Basic replacement outline for a competent tech: disconnect the battery negative, pop off the engine cover, unplug the connector, remove the retaining bolt, twist and withdraw the sensor, lightly oil the new O‑ring, refit and snug the bolt, reconnect, clear codes, and road test.
• Best practice: use a quality OE‑equivalent sensor, inspect the harness and connector pins for corrosion or oil, and verify cam/crank synchronisation with a scan tool.

Toyota lists this part across the 2018 Vitz/Yaris range (1KR‑FE 1.0L, 1NR‑FE/1NR‑FKE 1.3L, 2NR‑FE/2NR‑FKE 1.5L, and 1NZ‑FXE hybrid). Part numbers vary by engine code, so matching by VIN or engine stamp is the smart move. The job is typically a short workshop visit, and most owners pair it with fresh oil and a quick wiring tidy‑up if needed.

Where is the camshaft sensor on a 2018 Vitz/Yaris?

It’s mounted on the timing chain end of the cylinder head, under the plastic engine cover. On NR and 1NZ engines it’s easy to spot on the end of the head near the front of the vehicle. Access is straightforward with basic hand tools.

Can a failing camshaft sensor be cleaned, or does it need replacing?

Light oil on the body can be wiped off, and a perished O‑ring can be replaced. But the sensor is a Hall‑effect unit, if internal electronics are failing or the signal is erratic, replacement is the fix. Always check the connector and wiring first, as poor contacts can mimic sensor failure.

Is it safe to drive with a faulty camshaft sensor?

The engine may run, but performance and fuel economy usually suffer, and it may stall or go into limp mode. Continued driving risks catalyst damage from misfires. Best to get it diagnosed and sorted promptly.