Parts for your 2009 Honda Elysion-Camshaft sensor

2009 Honda Elysion Camshaft Sensor — Purpose, Service Tips, and FAQs

Based on Honda technical literature and parts catalogues for the Elysion platform, the 2009 Honda Elysion is equipped with a camshaft position sensor (CMP). Both engines offered in this model year—the 2.4L K24A DOHC i-VTEC and the 3.0L J30A V6—use CMP sensing for sequential fuel injection, ignition control and i-VTEC/VTC operation. Honda service manuals for K-series and J-series engines, along with dealer EPC listings, specifically reference CMP sensors fitted to the cylinder head (K24A: single sensor, J30A: one per bank).

On this vehicle, the camshaft sensor lets the ECU know exactly where the intake and/or exhaust cam is in its rotation. That timing information is critical for smooth starts, crisp throttle response and proper cam phasing under i-VTEC/VTC. When the CMP and crank sensors agree, the ECU fires injectors and coils at the right moment and adjusts cam timing for torque, economy and emissions. If the CMP signal drops out or goes noisy, the Elysion can misfire, run rich, struggle to start or throw the engine into limp mode while logging a fault code.

• Common symptoms of a failing CMP: hard starting, rough idle, surging, reduced power, increased fuel use and an illuminated check-engine lamp (often P0340/P0341).
• Typical locations: K24A—front of the cylinder head near the timing chain cover, J30A—CMP sensors at the rear of each cylinder head (banks 1 and 2).
• Causes: internal sensor failure, wiring chafes, oil contamination in the plug, or metal debris on the sensing face.

Servicing advice for a 2009 Elysion camshaft sensor is straightforward. It’s not a scheduled replacement item, it’s inspected and replaced on condition. During routine servicing, check the connector for oil seepage, brittle loom tape, or green corrosion on terminals. If a fault is suspected, test with a scan tool to confirm sync loss, wiggle-test the harness and inspect related grounds. Always rule out low battery voltage and timing-chain or VTC issues before condemning the CMP.

DIY replacement is usually a 15–30 minute job: disconnect the battery, unplug the sensor, remove its retaining bolt, clean the mounting face, then install an OE-quality sensor and new O-ring. Clear codes and confirm cam/crank sync and VTC operation on a short road test. Tighten fasteners to the manufacturer’s spec and avoid pinching the loom under the cover. For the J30A V6, allow extra time for access at the rear bank.

Popular questions

Does a 2009 Honda Elysion have a camshaft position sensor?
Yes. Technical manuals for the K24A and J30A engines specify CMP sensors used for sequential injection and i-VTEC/VTC control. Without a valid CMP signal, the ECU can’t properly phase the cams or time fuel and spark, so it’s essential on this model.

Where is the camshaft sensor on a 2009 Elysion?
On the K24A 2.4, it’s mounted on the cylinder head near the timing chain end. On the J30A V6, there are two—one on each head (banks 1 and 2), typically at the rear. Access varies, with the V6 rear bank being tighter.

Can a bad camshaft sensor stop the Elysion from starting?
It can. A failed or intermittent CMP may cause extended cranking, a no-start, or a rough start and limp mode. Always check battery health, crank sensor data, wiring integrity and timing-chain condition alongside CMP diagnostics.