Parts for your 2017 Honda Civic-Camshaft sensor

2017 Honda Civic Camshaft Sensor: what it does and when to replace it

Yes, the 2017 Honda Civic uses a camshaft position sensor. Technical references including the Honda Civic (2016–2020) Service Manual (PGM-FI/Engine Control), Honda’s OEM parts catalogues for L15B7 (1.5T) and K20C2 (2.0) engines, and industry repair databases (e.g., workshop information systems used by dealers) list the Camshaft Position (CMP) Sensor as part of the engine management system. Some variants run a single CMP, others may use more than one to monitor intake and exhaust cams.

This sensor’s core job is to let the ECU know exactly where the camshaft is in its rotation. That timing data is crucial for sequential fuel injection, spark timing, variable valve timing (VTC), stable idle, and clean emissions. If the signal goes missing or messy, the ECU can’t sync everything properly, which can mean hard starting, poor fuel economy, rough running, or a check engine light.

There’s no scheduled replacement interval for a CMP sensor on a 2017 Civic—it’s a replace-on-failure part. During regular servicing, a good workshop will visually check the sensor area for oil weep at the O-ring, brittle wiring, or a loose connector under the bonnet. If a warning light pops up with codes like P0340/P0341, proper diagnosis matters: technicians should verify power/earth, confirm cam/crank correlation with a scan tool, and only then swap the sensor if it’s truly the culprit. On higher-kilometre cars, oil contamination or timing-chain wear can mimic sensor faults, so ruling that out saves time and cash.

Replacement itself is usually straightforward: remove the engine cover, unplug the connector, back out the retaining bolt, and withdraw the sensor. A light smear of clean engine oil on the new O-ring helps it seat nicely. Refit and tighten to factory spec, reconnect, clear codes, and confirm live data shows a stable cam signal. If there are two sensors on the variant in question, best practice is to test both rather than guessing.

Driving with a failing CMP sensor can lead to limp-home behaviour, lumpy running, and higher fuel use. If the Civic starts to crank longer than usual, stumbles at idle, or throws a cam sensor code, it’s worth booking it in before a weekend trip—no one needs dramas on the motorway.

• Typical symptoms: hard starting, rough idle, misfire, poor economy, check engine light.
• Good habits: keep connectors clean and clipped, fix any oil leaks promptly, scan for codes early.
• Parts tip: always use a quality sensor and a fresh O-ring, cheapies can cause repeat faults.

Where is the camshaft sensor on a 2017 Civic?

It’s mounted at the end of the camshaft under the bonnet, usually on the timing cover side near the top of the engine. Some models have one sensor, others may have one for each cam. Removing the plastic engine cover gives clear access.

Is it safe to drive with a bad camshaft sensor?

Short trips may be possible, but it’s not ideal. The ECU can default to backup strategies that hurt performance and fuel economy, and the car may stall or go into limp mode. It’s smarter to get it checked sooner rather than later.

How much time does replacement take?

On most 2017 Civic variants, a competent technician can test and replace a single CMP sensor within an hour, give or take. Extra time may be needed for thorough diagnostics or if corrosion or oil contamination is present.