Parts for your 2005 Nissan Serena-Camshaft sensor

2005 Nissan Serena Camshaft Sensor — What It Does and How To Look After It

Technical sources confirm the 2005 Nissan Serena uses a camshaft position sensor (CMPS). The Nissan Serena C24 and C25 Electronic Service Manuals (EC section) list a “Camshaft Position Sensor (PHASE)” for QR20DE/QR25DE petrol and YD22DDTi diesel engines, and the Nissan parts catalogue (FAST) carries dedicated CMPS part entries for these engines. That makes the camshaft sensor absolutely relevant on this model year.

On the 2005 Serena, the camshaft sensor tells the engine control module exactly where the cam is in its rotation, so the ECU can time fuel injection and ignition precisely, especially during start-up and when switching between injection strategies. Without a clean signal, the van can be a pig to start, stumble at idle, or throw a check engine light with phase or sync faults.

It’s a solid-state, no-maintenance item, but it lives under the bonnet in a hot, oily environment. As part of regular servicing, it’s smart to give the connector a once-over and keep on top of oil changes — dirty oil and varnish can upset sensor readings on chain-driven QR/MR engines. If the Serena is logging codes such as P0340/P0345, misfiring at low revs, or intermittently stalling, the CMPS is high on the suspect list. Nissan service literature even details waveform checks and pin voltages if a workshop wants to test before replacing.

Replacement is straightforward for most Serena variants: disconnect the battery, remove the engine cover, locate the sensor at the cylinder head (usually at the timing chain end on the inline-four), unplug, remove the retaining bolt, and pull the sensor straight out. Lightly oil the new O-ring, seat it square, and torque the retaining bolt to spec (around 9–10 N·m is typical in Nissan EC manuals). Clear codes and, if applicable, perform an idle air volume learn. Many techs replace the crank and cam sensors as a pair on higher-kilometre vans given their shared duty cycle.

Quick tips owners appreciate:

• Use genuine or OEM-equivalent sensors to avoid signal quality dramas.
• Check for oil weeps at the sensor boss, a new O-ring often cures it.
• If hot restarts are rough but cold starts are fine, the CMPS is a usual suspect.

Where is the camshaft sensor on a 2005 Nissan Serena?

On the QR-series petrol engines, it’s mounted on the cylinder head at the timing chain end, accessible from the top after removing the engine cover. On the YD22DDTi diesel, it’s also on the head, near the front. Look for a small, single-bolt sensor with a two or three-pin connector.

What fault codes point to a bad camshaft sensor on the Serena?

Common Serena codes include P0340 (Camshaft Position Sensor Circuit) and P0345 (Camshaft Position Sensor “A” Circuit, Bank 2 for V engines — not applicable on the inline-four). Intermittent sync issues may also trigger P0335/P0336 alongside cam codes. Always check wiring and connectors before condemning the sensor.

Is it safe to drive with a failing camshaft sensor?

It may run but can stall, hesitate, or struggle to restart when hot. That’s not ideal on Kiwi or Aussie roads. Best to diagnose promptly, continued driving can leave the Serena stranded and may mask other issues.