Parts for your 2020 Toyota C-hr-Camshaft sensor

2020 Toyota C‑HR camshaft sensor — what it does, where it lives, and when to swap it

Yes, the 2020 Toyota C‑HR uses a camshaft position sensor. Toyota’s own technical literature for the AX10/AX50 series C‑HR (2019–2021) lists camshaft position sensor(s) in the Engine/Hybrid Control System, with diagnostics including DTCs P0340/P0341 and P0365/P0366. This applies to the 1.2‑litre turbo 8NR‑FTS and the 1.8‑litre hybrid 2ZR‑FXE used in various markets in 2020. The Toyota repair manual and wiring diagrams describe the sensor’s role in synchronising sequential fuel injection and VVT‑i control, confirming it’s a fitted and relevant component.

On a 2020 C‑HR, the camshaft sensor keeps the engine computer in the loop about where the cam is in its rotation. That timing info lets the ECU fire the injectors at the right moment, manage spark timing, and command variable valve timing smoothly. The result is easy starts, decent fuel economy, and clean running. If the sensor signal goes missing or messy, you’ll likely see a check‑engine light, longer cranking, rough idle, flat spots, or limp‑home behaviour, and the ECU may log one of those cam sensor DTCs.

This sensor isn’t a regular service item, but it does appreciate a bit of attention during routine servicing:

• Make sure oil changes are on time, clean oil helps VVT operation and avoids varnish building up around the timing end of the head.
• Visually inspect the sensor area for oil seepage and the connector for corrosion or broken wire insulation—heat and vibration can fatigue the loom near the rocker cover.
• If the engine has a no‑start or intermittent stall, check both the cam and crank sensor signals during diagnosis before throwing parts at it.

Replacement is straightforward for a home mechanic with basic tools, but always follow Toyota’s safety guidance (and isolate the 12‑volt supply, for Hybrid models, follow hybrid safety procedures). Typical steps:

1. Remove the engine cover for access. The sensor sits on the cylinder head at the timing chain end (intake side on most variants, some engines have an exhaust sensor as well).
2. Unplug the connector, remove the single hold‑down bolt, and twist‑pull the sensor out.
3. Lightly oil a new O‑ring, install the new sensor, and tighten the bolt to the factory spec (around 8–10 N·m—check the correct spec for your exact engine).
4. Clear any stored codes and road‑test to confirm clean operation.

If in doubt, a scan with live data will quickly tell if the cam and crank signals are lined up and stable. That’s the tidy way to avoid misdiagnosing a wiring issue as a faulty sensor.

Popular questions

Where is the camshaft sensor on a 2020 C‑HR?
It’s mounted on the cylinder head at the timing chain end. On most 2020 C‑HR engines you’ll find an intake cam sensor up top near the rocker cover, some variants also have an exhaust cam sensor. Pop off the plastic engine cover and you’ll spot the small, single‑bolt sensor with a two‑ or three‑pin plug.

Can you drive with a faulty camshaft sensor?
It may run, but it’s not ideal. You can get hard starts, poor performance, increased fuel use, and the car might drop into limp mode. Prolonged driving like that risks misfires and catalyst damage. Best to get it scanned and sorted promptly.

Does the camshaft sensor need regular servicing?
It’s not a scheduled replacement item. During routine services, check for oil leaks at the sensor, make sure the connector is clean and tight, and keep engine oil changes up to date. That preventative care keeps the timing system happy and the sensor reading cleanly.