Parts for your 2014 Nissan Serena-Crank angle sensor

2014 Nissan Serena crank-angle-sensor: what it does and when to replace it

Based on factory material, the 2014 Nissan Serena (C26) is fitted with a crank-angle-sensor — Nissan labels it the “Crankshaft Position Sensor (POS)”. The C26 Serena’s Engine Control System section of the Nissan service manual describes the CKP as a primary reference for ignition and injection timing, and the Nissan parts catalogue (commonly listing 23731-xxxxx) shows the sensor for MR20-series engines used in this model. So yes, this vehicle absolutely uses a crank-angle-sensor.

On a 2014 Serena, the crank-angle-sensor keeps the engine management on the straight and narrow. It tracks crank speed and position via a toothed reluctor, letting the ECU fire the coils and injectors at the right moment. It also cross-checks with the cam sensors for proper synchronisation, smooth starting, and reliable idle. When the sensor signal gets scrappy, the ECU can’t trust timing — that’s when owners see hard starting, random stalling, sluggish performance, or the MIL lighting up with codes like P0335–P0339.

This isn’t a scheduled replacement item in normal servicing. Instead, think of it as “replace when faulty or contaminated”. Common triggers include heat, vibration, oil ingress past the O-ring, or damage to the harness/connector. If the Serena shows symptoms, it’s smart to scan it first, check live data for a stable RPM signal, and inspect the wiring. A basic resistance check is possible, but scope testing the signal is the gold standard if you’ve got the gear.

Replacement is pretty straightforward for most Serena variants: isolate the battery, unplug the sensor at the bellhousing/engine block area, remove the retaining bolt, and ease the sensor out. Lightly oil the new O-ring, seat it square, and tighten the bolt to factory spec. Clear fault codes and confirm clean starts and stable idle. If the battery’s been off a while, an idle air volume learn may help — the Nissan manual outlines the procedure or it can be done with a scan tool. Genuine or high-quality aftermarket sensors both work, the key is a good O-ring seal and tidy loom routing so it’s not rubbing on anything.

• Typical symptoms: hard starting, intermittent stall, poor economy, rough idle, MIL on.
• Good practices: keep oil leaks sorted, protect the harness from heat/abrasion, and verify with a scan before swapping parts.

Popular questions about 2014 Nissan Serena crank-angle-sensor

Where is the crank-angle-sensor located on a 2014 Nissan Serena?
On most C26 Serenas, it’s mounted low on the engine near the transmission bellhousing, reading a reluctor on the crank. Access is from the front or underside — remove the plug, a single retaining bolt, and the sensor comes out. Exact access can vary slightly by engine variant and undertray setup.

What fault codes point to a bad crank-angle-sensor on a Serena?
Common engine ECU codes include P0335 (Crankshaft Position Sensor “A” Circuit) and related variants like P0336–P0339. If those appear with hard starting or stalling, inspect the wiring, connector, and sensor signal before replacing the part.

Is the crank-angle-sensor a regular service item?
No, it’s not replaced on a schedule. It’s serviced when symptoms or diagnostic results call it out. Keeping oil leaks in check and the harness secured helps the sensor live a long, drama-free life.