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Parts for your 2004 Honda Elysion-Camshaft sensor
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2004 Honda Elysion camshaft sensor — what it does and how to look after it
Yes, the 2004 Honda Elysion is fitted with a camshaft position sensor (CMP). Technical references including Honda’s Electronic Parts Catalogue (EPC) for RR1/RR2 Elysion models and the Honda Service Manual for the Elysion/Odyssey RR platform list a CMP sensor for both the 2.4‑litre K24A i‑VTEC and the 3.0‑litre J30A V6 engines, along with related diagnostics such as DTCs P0340–P0344. That makes the camshaft sensor relevant to any servicing or fault‑finding on this model.
The CMP sensor’s job is to tell the ECU exactly where the camshaft is in its rotation. That live position data is used to synchronise fuel injection and ignition, manage i‑VTEC/VTC cam timing, speed up cold starts, and keep idle smooth. If the signal goes missing or erratic, the ECU can’t time things precisely, so performance and economy take a hit and the car may drop into limp mode.
- Common symptoms: hard starting, stalling at idle, flat spots on acceleration, poor fuel use, and the MIL on with codes like P0340/P0341/P0344.
- Locations: on K24A, the CMP sits at the end of the cylinder head near the timing chain area (under the bonnet, top/gear end). On J30A V6, there are typically two CMPs, one on each bank’s head.
There’s no scheduled replacement interval for the CMP, it’s a “replace when faulty” item. Still, it’s smart to check the connector and harness during major services, especially around 100,000–150,000 kilometres, and keep engine oil changes regular—dirty oil and debris can upset sensor readings over time.
When replacement is needed, it’s a straightforward driveway job for many owners. Basic steps:
- Disconnect the battery and let the engine cool.
- Unplug the sensor connector and remove the single retaining bolt.
- Twist and withdraw the old sensor, catching any drips. Replace the O‑ring (lightly oil the new one).
- Install the new sensor, seat it fully, and tighten the bolt to the factory spec (snug, not overtight).
- Reconnect, clear codes with a scan tool, and perform a short road test. An idle relearn (warm idle with no loads for a few minutes) helps the ECU settle.
Use genuine or quality OEM‑equivalent parts, avoid stretching the loom, and keep the connector clean and dry. If a new sensor doesn’t resolve the fault, inspect wiring for chafing and verify timing chain/belt condition and cam timing, as underlying mechanical issues can mimic a sensor fault.
Where is the camshaft sensor on a 2004 Honda Elysion?
On the 2.4L K24A, it’s mounted at the gear end of the cylinder head near the timing chain—easy to see from the top once the engine cover is off. On the 3.0L J30A V6, there are typically two—one on the rear bank and one on the front bank—each secured with a single bolt and an electrical connector.
Does a new camshaft sensor need programming?
No special coding is normally required. After fitting, clear any stored fault codes, then let the engine warm up and idle for a few minutes with no accessories on. A short road test helps the ECU finalise trims and cam control.
Can a camshaft sensor be cleaned instead of replaced?
You can wipe the tip and renew the O‑ring if there’s minor contamination or an oil weep. But if the internal Hall or magnetic element has failed or the signal is erratic, replacement is the reliable fix. Keeping oil fresh reduces the chance of repeat issues.
