Parts for your 2018 Toyota C-hr-Camshaft sensor

2018 Toyota C‑HR camshaft sensor – fitted, useful, and worth keeping in good nick

Based on Toyota’s own technical literature, the 2018 Toyota C‑HR is fitted with a camshaft position sensor. The Toyota Service Information (TIS) Repair Manual for C‑HR engines (including the 1.2‑litre 8NR‑FTS turbo petrol and the 1.8‑litre 2ZR‑FXE hybrid), the model’s Electrical Wiring Diagram, and the Toyota Electronic Parts Catalogue all list a camshaft position sensor (often identified in Toyota docs as the “G2” signal) feeding the Engine Control Module. These sources confirm the sensor is standard equipment and actively used for engine management on this model year.

On the 2018 C‑HR, the camshaft sensor’s job is to tell the ECU exactly which stroke each cylinder is on. Paired with the crankshaft sensor, it lets the ECU fire the injectors and ignition at the right time, manage VVT‑i cam timing, and get clean, quick starts. Without a good signal, the car can crank longer, feel doughy off the mark, or switch on the check engine light.

Common clues the sensor or its wiring needs attention include hard starting, intermittent stalling at idle, flat spots under load, poor fuel economy, and fault codes like P0340–P0344. Because the C‑HR relies on variable valve timing, a weak or noisy cam signal can also trigger VVT‑related codes and make the engine feel a bit off‑song.

It’s not a scheduled service item, so replacement is only needed if it fails testing or shows damage. That said, it’s smart to give it a quick look during regular servicing: make sure the connector is seated firmly, the harness isn’t rubbing on brackets under the bonnet, and there’s no oil weeping past the sensor’s O‑ring. Good quality oil and timely changes help keep varnish and debris away from the timing area, which is where the sensor reads the cam trigger.

When replacement is on the cards, using a genuine or high‑quality aftermarket sensor is the safe bet. Typical steps are straightforward: disconnect the battery negative, remove the engine cover, unplug the sensor on the cylinder head near the timing cover, undo the single retaining bolt, then twist and pull the sensor out. Lightly oil the new O‑ring, install, and torque to spec as per the Toyota workshop manual. After fitting, clear any codes and road‑test. If a fresh sensor doesn’t resolve cam/crank correlation faults, consider a wiring check and a timing chain alignment inspection. A technician can verify the signal with a scan tool or oscilloscope to be certain it’s all sweet.

• Keep connectors clean and dry, avoid pressure‑washing the engine bay.
• If the check engine light appears, scan for codes before replacing parts.
• When in doubt, follow the Toyota TIS repair steps and torque specs.

FAQs

Where is the camshaft sensor on a 2018 Toyota C‑HR?
It’s mounted on the cylinder head, typically near the timing cover end. After lifting the engine cover, look for a small sensor with a two‑pin or three‑pin connector secured by a single bolt. Exact orientation can vary by engine (8NR‑FTS vs 2ZR‑FXE), but it’s always at the top end of the engine so it can “read” the camshaft.

What symptoms show a bad camshaft sensor on this model?
Hard or long cranking, a rough idle, random stalling at traffic lights, flat spots on acceleration, increased fuel use, and the check engine light are all common. Typical diagnostic trouble codes include P0340–P0344 and, in some cases, VVT‑related faults if the ECU can’t trust the cam timing signal.

Do hybrid C‑HR models also use a camshaft sensor?
Yes. The 2ZR‑FXE hybrid engine also relies on a camshaft signal for synchronising fuel injection and valve timing. Even though the hybrid system manages engine starts differently, the ECU still needs accurate cam phase information for smooth operation and emissions control.