Parts for your 2020 Nissan Serena-Camshaft sensor

2020 Nissan Serena Camshaft Sensor — What It Does and When to Service It

Based on factory documentation, the 2020 Nissan Serena does use a camshaft position sensor. The C27-series Serena with the MR20DD 2.0-litre S-HYBRID and the e-POWER variant (HR12DE range-extender engine) both specify a Camshaft Position Sensor (often labelled “PHASE”) in Nissan’s service manuals for the Engine Control system. Nissan’s FAST parts listings and mainstream aftermarket catalogues also enumerate a camshaft sensor for these engines, confirming it’s a standard fit item on this model year.

On the Serena, the camshaft sensor’s job is to tell the engine control module exactly where the camshaft is in its rotation. That timing data lets the ECU fire the injectors and spark at the right moment and control variable valve timing. When it’s healthy, cold starts are crisp, idle’s steady, and fuel economy stays on point. When it’s on the blink, the van can be a grump to start, stumble at idle, feel flat, or throw the check-engine light with cam or sync-related fault codes.

While the sensor itself isn’t a scheduled replacement item, it pays to treat it kindly during routine servicing. Keep engine oil and filters fresh, because sludgy oil can affect cam timing hardware and confuse the ECU’s interpretation of cam and crank signals. If the Serena starts hard, misfires at low revs, or logs correlation codes, a quick diagnostic with live data to compare cam and crank signals is the go. Always rule out wiring chafes, loose connectors, or oil ingress at the plug before condemning the sensor.

Replacement is straightforward for a competent technician: disconnect the battery, remove the electrical connector, undo the retaining bolt, and ease the sensor out with an O-ring swap on installation. Use a quality part that matches the OE spec and torque the fastener correctly. After fitting, clear codes and perform a road test while watching cam/crank sync. Owners who do lots of short trips or tow should be extra vigilant with oil changes, as clean oil supports stable valve timing and keeps the ECU happy with the cam signal.

• Typical symptoms of a failing sensor: hard starting, rough idle, hesitation, poor fuel economy, illuminated MIL.
• Good servicing habits: timely oil changes, careful inspection of loom and connectors, scan-tool checks for sync and learned values.

Popular questions

Where is the camshaft sensor on a 2020 Nissan Serena?
On the C27 Serena it’s mounted at the end of the cylinder head, reading a trigger on the camshaft. Access varies by engine: MR20DD usually places it near the top of the head by the cam cover, while the e-POWER HR12DE arrangement is at the side of the head. A torch and a look around the cam cover area under the bonnet will generally reveal the small, two- or three-pin sensor with a single retaining bolt.

If access is tight due to covers or intake plumbing, removing those trim pieces first makes life easier and helps avoid damaging the connector.

What fault codes point to a camshaft sensor issue on the Serena?
Common codes include cam/crank correlation or position circuit faults. When these show up with symptoms like long crank or stalling, the cam sensor is a prime suspect. That said, wiring faults, poor earths, or timing issues can mimic a bad sensor.

A proper scan with live data to confirm cam/crank sync and a quick continuity check of the loom helps avoid guesswork and parts darts.

Can the camshaft sensor be cleaned, or should it be replaced?
If the tip is lightly oily, a gentle wipe won’t hurt, but internal electronic faults won’t be fixed by cleaning. If it’s cracked, soaked with oil through the body, or failing tests, replacement is the reliable fix.

Use an OE or high-quality equivalent, fit a fresh O-ring, and verify operation with a road test and scan-tool data once installed.