Parts for your 2018 Nissan X-trail-Crank angle sensor

2018 Nissan X‑Trail crank angle sensor (crankshaft position sensor)

Based on Nissan’s T32 Electronic Service Manual (EC — Engine Control System, “Crankshaft Position Sensor”) and Nissan’s global parts catalogue for the T32 X‑Trail, this model is fitted with a crank angle sensor, more commonly referred to as the crankshaft position sensor (CKP). It’s present across the petrol and diesel engine options used in 2018 models and is essential to engine management.

The crank angle sensor tracks the crankshaft’s exact position and speed. The engine control module uses that signal to time spark and fuel injection, to sync with the cam sensor, and to monitor misfire. If the CKP signal drops out, the X‑Trail may crank without starting, stall unexpectedly, or throw the check engine light. Typical fault codes include P0335/P0336, and scan data will often show erratic or zero engine speed during a no‑start.

For servicing, the CKP isn’t a scheduled replacement item, but it’s smart to keep an eye on it. During routine services, a quick visual once‑over under the bonnet helps: check the sensor connector for broken locks or green corrosion, confirm the harness is clipped away from the exhaust, and look for oil leaks tracking down the bellhousing or timing cover that could contaminate the sensor area. On magnetic‑type sensors, metal fuzz can collect on the tip, avoid harsh solvents and just wipe gently if accessible. Good battery voltage and earths also help keep the signal clean.

When replacement is needed, use an OE‑quality sensor matched to the exact engine variant (e.g., QR25DE 2.5‑litre petrol, MR20DD 2.0‑litre petrol, or the dCi diesel). The unit is typically secured by a single bolt at the lower block/timing cover or bellhousing area. Fit a lightly oiled new O‑ring, seat the sensor squarely, torque to spec per the service manual, and route the loom in its factory clips. After installation, clear codes and perform a crank pattern relearn with a capable scan tool if specified by the manual. If symptoms persist, check the camshaft sensor and engine timing — the two signals work as a pair.

• Common signs: long crank, intermittent stalling when hot, no‑start, MIL on with P0335/P0336.
• Good practice: inspect connectors and harness every 10,000–15,000 km during regular servicing.
• Pro tip: heat‑soak failures may test fine cold, reproduce faults at operating temp.

Popular questions

Does the 2018 X‑Trail actually have a crank angle sensor?
Yes. Nissan’s T32 service documentation lists a crankshaft position sensor for 2018 X‑Trail engines. It may be described as a “crankshaft position sensor (POS)” but it serves the same role people mean by “crank angle sensor”. Without it, the engine won’t start or run properly.

What are the symptoms of a failing crank angle sensor on an X‑Trail?
Drivers may notice long cranking, random stalling (often when hot), lack of power, and the check engine light. Fault codes like P0335/P0336 are common. On a scan tool, engine speed may read zero while cranking during a no‑start.

Is a relearn needed after replacing the sensor?
On many X‑Trail engine variants, a crankshaft position relearn via a professional scan tool is recommended after replacement. This helps the ECM accurately recognise the signal pattern and can prevent rough running or recurring codes.