The Honda Civic typically uses a single camshaft position sensor (CMP) to determine the camshaft’s location and coordinate ignition timing with the crankshaft. In practice, most Civics have one CMP, though the exact layout can vary by generation and engine family.
What the camshaft sensor does
The camshaft position sensor provides a signal to the engine control unit (ECU) that represents the camshaft’s position relative to the crankshaft. The ECU uses this information to manage ignition timing and fuel delivery, and in some engines to control variable valve timing or VTEC engagement. The CMP works in tandem with the crankshaft position sensor (CKP) to maintain accurate timing. If the CMP signal is lost or erratic, diagnostic trouble codes related to cam timing can appear.
Sensor counts across common Civic engine families
Below is a concise guide to how many camshaft position sensors are typically found across major Civic engine families. Each of these configurations relies on a single CMP for the engine, with the crank sensor serving as a separate timing reference.
- D-series engines (late 1980s to 2000): typically one camshaft position sensor.
- B-series engines (early to late 1990s): typically one camshaft position sensor.
- K-series engines (2001–present Civics): typically one camshaft position sensor.
- Modern Civic variants with newer engine families (including 1.5L and other contemporary designs): typically one camshaft position sensor.
In practice, if you are diagnosing a cam timing issue, start with the camshaft position sensor itself, then inspect the wiring harness and connector, and also verify the crankshaft position sensor and timing components.
Edge cases and clarifications
Stock Honda Civics generally do not use two camshaft position sensors. If you encounter two cam sensors on a Civic, it may indicate an aftermarket modification, a misidentified component, or a non-standard regional variant. Always confirm the engine code and model year to ensure accurate identification.
Summary
For the question of how many camshaft sensors a Honda Civic has, the typical answer is one camshaft position sensor. This single CMP works with the crankshaft sensor to manage timing across most Civic generations. If you experience cam timing-related codes or sensor failures, begin diagnostics with the CMP, then check wiring, the CKP sensor, and the timing chain/belt system as needed.