Parts for your 2002 Nissan Pulsar-Camshaft sensor

2002 Nissan Pulsar camshaft sensor — what it does and how to look after it

Yes, the 2002 Nissan Pulsar (N16 series) uses a camshaft position sensor. This isn’t guesswork: the Nissan Factory Service Manual for the N16 Pulsar/Almera (EC section) details a Camshaft Position Sensor (PHASE) used for sequential injection and valve timing control, and Nissan’s service bulletin NTB05-067 (covering contemporaneous QG18DE-powered models) addresses updated crank and cam sensors due to intermittent stalling and no-starts. Haynes/Gregory’s guides for the N16 platform echo the same layout and diagnostic trouble codes (P0340/P0345). So the camshaft sensor is absolutely relevant on a 2002 Pulsar.

On this model, the camshaft sensor lets the engine control module know exactly where the intake cam is in its rotation. That timing data is critical for clean start-up, sequential fuel injection, smooth idle, and the Nissan Valve Timing Control System (NVCS) fitted to many QG engines. When the sensor is healthy, the car starts crisply, pulls well through the revs, and uses less fuel around town.

It’s not a scheduled replacement item, but it does wear out with heat and age. Tell-tale signs include a long crank before starting, the engine dropping into limp mode, rough idle, flat spots on acceleration, or the check engine light with codes like P0340/P0345. Many techs in Australia and New Zealand also see intermittent stalling once warm, which the Nissan bulletin addressed with revised sensor designs.

• Location: under the bonnet, at the timing chain end of the cylinder head, secured with a small bolt and sealed by an O-ring.
• Replacement tips: disconnect the battery, unplug the connector, remove the bolt, ease the sensor out, lightly oil the new O-ring, refit and snug to factory spec. Clear codes and perform an idle relearn if needed.
• Quality matters: use a genuine or proven OE-equivalent sensor. Inspect the harness for oil contamination or brittle wiring.
• Good practice: if there’s a history of warm stalls or related crank-sensor faults, replacing both cam and crank sensors together with the updated parts can save a second visit.

For servicing, a quick visual under the cover, a scan for stored codes, and a check of the connector are worthwhile at regular intervals, especially on higher-kilometre Pulsars that see plenty of city heat cycles.

Popular questions

Where is the camshaft sensor on a 2002 Nissan Pulsar?
It sits on the cylinder head at the timing chain end, near the intake cam gear. Look for a small, black, sensor body held in with one bolt and a two- or three-pin connector. Access is straightforward with basic hand tools.

What are the signs the camshaft sensor is failing?
Common clues are extended cranking, uneven idle, hesitation on take-off, poorer fuel economy, and the check engine light (often P0340/P0345). Heat-related intermittent stalling after warm-up is also a known behaviour on this generation.

Do both cam and crank sensors need replacing together?
Not always, but many workshops recommend doing both if there’s a stalling/no-start history. Nissan’s technical bulletin introduced updated parts, and pairing them can prevent a repeat visit when one weak sensor is replaced and the other fails shortly after.