Parts for your 2020 Honda Civic-Camshaft sensor

2020 Honda Civic Camshaft Sensor: What It Does and When to Service It

Based on Honda Service Information, common OBD-II diagnostic charts for the 2020 Civic, and OEM parts catalogues used by dealerships and aftermarket systems (Honda SIS/HDS, Honda EPC, Mitchell 1, and ALLDATA), the 2020 Honda Civic is fitted with camshaft position sensor(s). The 2.0‑litre K20C2 engine uses a camshaft position sensor on the intake cam, while the 1.5‑litre turbo L15B7 typically uses two—sensor A (intake) and sensor B (exhaust)—to support dual variable valve timing. Related factory DTCs (such as P0340/P0341 for Sensor A and P0365/P0366 for Sensor B) further confirm their presence and function on this model.

The camshaft sensor in a 2020 Honda Civic keeps the engine’s timing spot on by telling the ECU where the cam(s) are in relation to the crank. That live position data lets the car run sequential fuel injection, dial in spark timing, and control variable valve timing for smooth idle, decent grunt, and tidy emissions. If the sensor signal goes walkabout, the engine may struggle to start, feel doughy, or throw a warning light.

Honda doesn’t list the cam sensor as a routine replacement item, so it’s more of a “inspect if there’s a fault” part. Regular oil changes with the correct spec help keep varnish and blow-by from contaminating the sensor’s nose. During servicing, a quick look under the bonnet at the connector and harness is worthwhile—check for oil wicking into the plug, brittle conduit, or chafing near the timing cover.

Typical signs the Civic’s cam sensor needs attention include:

• Hard starting, rough idle, or hesitation under load
• Check engine light with codes like P0340, P0341, P0365, or P0366
• Poor fuel economy and inconsistent power

On 2.0‑litre models, the sensor is mounted at the front of the cylinder head on the intake cam. On 1.5T models, there’s an additional unit on the exhaust cam (towards the firewall). Replacement is straightforward: remove the engine cover, unplug the connector, undo the retaining bolt, and ease the sensor out. Lightly oil the new O‑ring, seat it squarely, and nip the bolt to factory spec. After refitting, clear any codes and let the ECU relearn during a short drive cycle—no special programming is usually required.

Quality matters here. Owners often opt for genuine Honda or a reputable brand to avoid signal noise and repeat faults. If faults persist after replacement, a proper diagnostic of wiring integrity and timing correlation is smart money.

Popular questions about 2020 Honda Civic camshaft sensor

Does a 2020 Honda Civic have one or two camshaft sensors?
Most 2.0‑litre Civics have one sensor on the intake cam. The 1.5‑litre turbo usually has two—intake (Sensor A) and exhaust (Sensor B)—to control dual VTC. A scan tool’s live data and the vehicle’s engine code will confirm which setup is fitted.

Where is the camshaft sensor located on a 2020 Civic?
It’s on the cylinder head near the end of the camshaft. Intake-side (front of the engine bay) for all models, turbo variants also have an exhaust-side unit towards the firewall. Look for a small, two- or three-pin sensor held by a single bolt with an O‑ring seal.

Is it safe to drive with a bad camshaft sensor?
The car may run in a limited fallback mode, but it can stall, start poorly, and use more fuel. It’s best to sort it promptly to avoid roadside grief and to keep emissions and performance on song.