Parts for your 2017 Nissan Serena-Camshaft sensor

2017 Nissan Serena camshaft sensor — fitted, and here’s why it matters

Based on Nissan’s C27 Serena Electronic Service Manual (EC and EM sections, 2016–2018 model years) and Nissan’s global parts catalog (FAST), the 2017 Serena is equipped with a camshaft position sensor (often listed as “Camshaft Position Sensor (PHASE)”). The MR20DD 2.0-litre S-HYBRID engine used in 2017 requires this sensor for sequential fuel injection, ignition timing, and variable valve timing control. Even later Serena e-POWER variants still use a petrol engine as a generator and also employ a camshaft sensor. So yes—this vehicle definitely uses a camshaft sensor.

The camshaft sensor on a 2017 Nissan Serena keeps the engine and hybrid system playing nicely together. It tells the ECU exactly where the camshaft is in its rotation so the ECU can sync fuel and spark with the crankshaft signal, and fine-tune valve timing. When the sensor goes out of whack, owners might notice hard starting, stalling, rough idle, sluggish performance, or the Serena dropping into a limp-home feel. The check engine light usually joins the party with codes like P0340/P0341.

It’s not a scheduled service item, but it’s smart to treat the camshaft sensor like a “inspect when servicing” component. During regular servicing, scanning for pending fault codes, checking the harness for chafing near the rocker cover, and looking for oil wicking into the connector can save headaches later. Clean engine oil at the correct level helps, too—excess blow-by and varnish can contribute to sensor contamination over time.

Replacement is straightforward on most MR20DD Serenas and typically takes 15–30 minutes. Many variants run one sensor, some run two (intake and exhaust). Usual steps are: disconnect the battery negative if preferred, remove the engine cover, unplug the sensor connector at the top/side of the head near the timing chain cover, undo the small retaining bolt, then twist and withdraw the sensor (there’s an O-ring). Lightly oil the new O-ring, install, and tighten the bolt to the spec in the Nissan ESM (about 8–10 N·m is typical). Reconnect, clear the codes, and verify cam/crank sync with a scan tool. No special coding is normally required.

Handy tips for owners in Australia and New Zealand:

• Use quality OEM-spec sensors (often Hitachi for Nissan) to avoid intermittent faults.
• If the Serena has a no-start when hot, test for signal dropout before blaming the fuel system.
• If a new sensor doesn’t fix it, inspect timing chain stretch and connector pin tension.

Technical references: Nissan C27 Serena Electronic Service Manual (EC: Engine Control, EM: Engine Mechanical), Nissan FAST parts catalogue for C27, and Nissan service procedures for MR-series engines.

FAQ

Where is the camshaft sensor on a 2017 Nissan Serena?
On the MR20DD, it’s mounted on the cylinder head near the timing chain end, accessible under the plastic engine cover. Some variants use two sensors (one at the intake cam, one at the exhaust cam). Look for a small, single-bolt sensor with a two- or three-pin connector.

What are the common symptoms of a failing camshaft sensor?
Hard starting, extended cranking, rough idle, misfires at low RPM, sudden loss of power, and the check engine light. Scan tools often show P0340/P0341, and live data may reveal cam/crank correlation issues. Problems can be intermittent when hot.

Does a new camshaft sensor need programming?
No special programming is typically required on the 2017 Serena. After fitting a quality sensor, clear any codes and perform a road test. A quick scan to confirm stable cam/crank sync is good practice. If idle quality changed during other work, an idle air volume learn may help, but it isn’t usually needed for the sensor alone.