Parts for your 2018 Honda Odyssey-Camshaft sensor

2018 Honda Odyssey camshaft sensor — what it does and how to look after it

Yes, the 2018 Honda Odyssey is fitted with camshaft position sensors. Honda’s own technical material for the J35 V6 (2018 Odyssey) details Camshaft Position (CMP) Sensor diagnostics and replacement procedures, and OEM parts catalogues list two CMP sensors (Bank 1 and Bank 2). Common OBD-II coverage for this model includes CMP-related DTCs such as P0340/P0341 (Sensor A) and P0365/P0366 (Sensor B). Those service manual and parts catalogue references make it clear the camshaft sensor is very much used on this vehicle.

The camshaft sensor tells the engine computer exactly where each camshaft is in its rotation. That lets the Odyssey run sequential fuel injection, time spark accurately, and command Honda’s Variable Valve Timing and Lift (VTEC/VTC) properly. It also helps with quick starts, smooth idle, and clean emissions. When the sensor signal and the crankshaft signal stay in sync, the van feels right, when they don’t, it can feel flat or hesitant and will usually light the check engine lamp.

• Typical symptoms when a CMP sensor plays up:
  • Hard starting or stalling at idle
  • Sluggish performance, poor fuel economy
  • Check engine light with codes like P0340/P0341/P0365/P0366
  • Intermittent misfire-like feel under load

There’s no fixed service interval for CMP sensors on the Odyssey, they’re a “replace-on-fault” item. Still, a bit of care goes a long way. Keeping oil changes on time helps prevent varnish and debris that can affect cam phasing and, in turn, the sensor’s signal quality. During routine servicing, a quick look under the bonnet to check the CMP connectors and harness routing on both cylinder heads (front near the radiator, rear near the firewall) is worthwhile. Look for oil wicking at the plug, brittle conduit, or chafing.

Replacing a camshaft sensor on the 2018 Odyssey is straightforward for a competent DIYer or any workshop. Steps are broadly: disconnect the battery, remove the engine cover, unplug the sensor, remove the single retaining bolt, twist the sensor out, lightly oil a new O-ring, install the new sensor, and tighten the bolt to the workshop manual spec. Clear codes, then let the engine idle and take a short drive so the ECU rechecks cam/crank correlation. If a new sensor doesn’t resolve a fault, check wiring integrity and cam timing/VTC operation as advised in Honda’s diagnostic flowcharts.

Technical sources referenced: Honda Service Information for the 2018 Odyssey (PGM-FI diagnostics and CMP sensor replacement procedures), Honda OEM parts catalogues listing Bank 1/Bank 2 CMP sensors for the J35 V6, and OBD-II DTC coverage used by Honda for this model year.

How many camshaft sensors does a 2018 Odyssey have, and where are they?

The 2018 Odyssey J35 V6 uses two camshaft position sensors—one for each bank. You’ll find one at the front cylinder head (radiator side) and the other at the rear head (firewall side), mounted near the end of the camshaft with a single retaining bolt and a sealed connector.

Do camshaft sensors need regular servicing on a 2018 Odyssey?

No, they’re not a scheduled maintenance item. They’re usually replaced only if faulty. As part of normal servicing, it’s smart to inspect the connectors and harness, and keep engine oil fresh so cam timing control stays clean and stable, which supports a healthy sensor signal.

Can a bad camshaft sensor damage the engine if driven?

It won’t usually cause mechanical damage straight away, but drivability can suffer—hard starts, poor performance, or stalling. Prolonged driving with a CMP fault may stress the catalytic converters due to misfires. Best bet: diagnose and repair promptly to avoid knock-on issues.