Parts for your 2009 Nissan Dualis-Crank angle sensor

2009 Nissan Dualis crank-angle-sensor: what it does and how to look after it

Per Nissan’s factory service information for the J10 series (Qashqai/Dualis, 2007–2013), the 2009 Nissan Dualis is fitted with a crank-angle sensor, also documented as the Crankshaft Position Sensor (POS/CKP) in the Engine Control (EC) section. The MR20DE 2.0‑litre petrol and the M9R 2.0‑litre diesel engines both rely on this sensor for engine management. Independent technical databases and parts catalogues for the J10 platform list the CKP/CAS as a service part, confirming its presence on Australian and New Zealand models.

On a 2009 Dualis, the crank-angle sensor is the ECU’s timekeeper. It reads a toothed wheel on the crank to report exact crank angle and rpm. With that live signal, the ECU times fuel injection and spark, synchronises with the cam sensors, and monitors for misfire. If the CAS goes out of whack, the engine can be hard to start, stumble, stall at idle, or throw a check-engine light (often P0335/P0336).

It’s a sealed, solid-state part, so there’s no scheduled replacement—just “fit and forget” until symptoms or a fault code says otherwise. As part of routine servicing, it’s smart to do a quick visual check: look for oil wicking into the connector, heat-baked wiring, or a loose retaining bolt. Keeping the area clean and the loom clipped away from the exhaust goes a long way to sensor longevity.

Replacement is straightforward on most Dualis variants: disconnect the battery, unplug the sensor, remove the single retaining bolt, twist and withdraw the sensor, then swap in the new one with a lightly oiled O‑ring. Refit the bolt and torque it to roughly 8–10 N·m, reconnect, clear any codes and verify cranking rpm on a scan tool. No coding is typically required, the ECU recognises it on first start. If idle is a bit wonky afterwards, an idle learn via scan tool can help, but it’s not usually mandatory.

Good tips when choosing a replacement:

• Stick with OE or a reputable brand—cheap units can give erratic signals.
• If there’s oil contamination at the plug, fix the leak (often rocker cover) so the new sensor isn’t compromised.
• If you’ve had intermittent stalling when hot, check both the CAS and the harness for resistance spikes.

A competent DIYer can generally swap the sensor in under an hour on the petrol MR20DE. For diesels or tight access, a hoist makes life easier. Either way, it’s a small part with a big say in how smoothly the Dualis runs.

Popular questions about the 2009 Nissan Dualis crank-angle-sensor

Where is the crank-angle sensor located on a 2009 Dualis?
On most MR20DE petrol models it’s mounted low on the engine block reading the flywheel/reluctor near the gearbox bellhousing, accessed from underneath. On the M9R diesel, location is similar but access can vary with shields and ancillary brackets. A torch and mirror help spot the single-connector sensor with one small retaining bolt.

If you’re unsure which engine you’ve got, check the build plate or engine cover—the general removal steps are the same, but access space can differ.

What are common symptoms of a failing crank-angle sensor?
Typical signs include occasional no-start when hot, sudden stalling at idle or when coming to a stop, rough running, and the tacho dropping to zero just before the engine dies. The check-engine light may set codes like P0335 or P0336. A scan tool that shows zero rpm while cranking is a big hint the CAS isn’t talking.

Because wiring faults can mimic a bad sensor, always inspect the connector and loom for oil, corrosion, or broken insulation before replacing parts.

Does the Dualis need programming after replacing the sensor?
No special coding is generally required. Fit the new sensor, clear fault codes, and start the car. The ECU takes the signal straight away. If the battery has been disconnected for a while, an idle learn procedure may tidy up the idle quality, but it’s not usually essential.

A quick road test and a check for stable rpm and no returning fault codes is the go-to final step.