Parts for your 2002 Honda Civic-Camshaft sensor

2002 Honda Civic Camshaft Sensor — What it does and when to service it

Per Honda’s factory service information for the 2001–2005 Civic range (Engine Electrical, Camshaft Position Sensor section) and the 2002 Honda Civic parts catalogue, every 2002 Civic engine variant (D17A1/A2 1.7L and K20A3 in the hot-hatch Si/Type R markets) uses a camshaft position (CMP) sensor. This is reinforced by Honda’s OBD-II diagnostic definitions for DTCs P0340/P0341, which specifically reference the CMP circuit on this model. So yes, the camshaft sensor is fitted and very relevant on a 2002 Honda Civic.

On a 2002 Honda Civic, the camshaft sensor keeps the engine computer in the loop about where the intake cam is in its rotation. That lets the ECU fire the injectors in the right order (sequential fuel injection), sync spark timing, and manage systems like VTEC on applicable engines. If the signal goes missing, the Civic may crank longer, run rough, lose power, and light the check engine lamp, the ECU can fall back to a limp strategy, but drivability suffers.

Day to day, there’s no fixed maintenance interval for the CMP sensor — it’s a fit-and-forget item until there’s a fault. What does help is preventative care around it: keep the rocker cover area clean, fix oil weeps promptly (oil intrusion can foul the connector), and avoid tugging on the wiring when doing spark plugs or valve clearance checks. A quick visual once-over during regular servicing goes a long way.

Replacement on the D17 engines is usually at the timing belt end of the cylinder head, on K-series it’s at the top of the head near the cam cover. It’s a straightforward swap with basic tools: disconnect the battery, unplug the connector, remove the retaining bolt, swap the sensor and O-ring, then refit and clear codes. Use quality OEM-equivalent parts and ensure the connector seats positively — many intermittent P0341 complaints come down to a loose plug or chafed loom. After replacement, a short road test with a scan tool to verify stable cam sync and no returning DTCs is good practice.

• Common symptoms: hard starting, rough idle, misfire feel, poor fuel economy, and DTCs P0340/P0341.
• Pro tip: if codes persist, inspect the harness routing and engine earths before condemning the new sensor.

Popular questions

Where is the camshaft sensor on a 2002 Honda Civic?
On most 1.7L D17 models, it’s mounted on the cylinder head at the timing belt end. On K-series (Si/Type R), it sits at the top/front of the head near the cam cover. It’s held by a small bolt with a plug-in connector — easy to spot once the engine cover and nearby hoses are out of the way.

Is it safe to drive with a bad camshaft sensor?
It may run, but it’s not ideal. The ECU can fall back to less precise fuelling and timing, so you can get sluggish performance, higher fuel use, and the risk of stalling. Best to sort it sooner rather than later to avoid getting stranded.

Do camshaft sensors need regular replacement?
No set interval — they’re replaced on condition. If there are no fault codes and the car starts and runs cleanly, leave it be. Keep the area clean and wiring intact, and it can last the life of the vehicle.