Parts for your 2018 Nissan Pathfinder-Camshaft sensor

2018 Nissan Pathfinder camshaft sensor: what it does and when to replace it

Based on technical references including the Nissan Pathfinder (R52, 2018) Factory Service Manual — Engine Control (EC) and Engine Mechanical (EM) sections — and the Nissan electronic parts catalogue, the 2018 Nissan Pathfinder is fitted with camshaft position sensors. The FSM details the “Camshaft Position Sensor (PHASE)” signals used by the ECM, and its diagnostic sections list DTCs like P0340/P0345 for cam sensor circuits. In short, the camshaft sensor is definitely relevant on this model.

On the 3.5‑litre V6 (VQ35 series), the camshaft sensor tells the engine computer exactly where each cam is in its rotation. That info is crucial for quick starts, spot‑on fuel injection and ignition timing, smooth idle, and for the variable valve timing system to do its job. The Pathfinder uses two cam sensors — one on each cylinder head — so the ECM can manage both banks cleanly.

They’re not a regular service item, but life under the bonnet is hot and oily, and sensors can get grumpy with age. Owners might notice hard starts, a stumble off the line, a rough idle, flat fuel economy, or the Check Engine light. If a scan shows P0340 or P0345, it’s time for a proper look.

Before swapping parts, a smart check includes:

• Inspecting the plugs and wiring near the cam covers for broken locks, oil wicking, or corrosion.
• Verifying clean engine oil of the correct spec — dirty oil can upset valve timing behaviour.
• Ruling out a crank sensor or timing issue if symptoms are severe.

Replacement is straightforward for a competent DIYer: disconnect the battery, unplug the sensor, remove the retaining bolt, wiggle the sensor free, lightly oil the new O‑ring, seat it squarely, and tighten the bolt to the factory torque. Clear codes and take a short drive so the ECM relearns. Many techs favour genuine or high‑quality OEM‑equivalent sensors for stable signal quality.

As part of regular servicing, keeping to the correct oil grade and interval in Australia and New Zealand, checking for oil leaks around the cam covers, and giving the connectors a quick once‑over will help the cam sensors live a long, uneventful life. If one fails, it’s common to proactively assess the mate on the other bank as well.

FAQs

How many camshaft sensors are on a 2018 Nissan Pathfinder?
It has two — one for each cylinder bank. That lets the ECM track cam timing on both sides for accurate fuel, spark and variable valve timing control.

Can it be driven with a bad camshaft sensor?
Sometimes, but it’s not a great idea. The engine may be hard to start, run rough, lose power, or trigger limp mode. Get it scanned and sorted to avoid being stranded and to protect the catalytic converters.

Do camshaft sensors need routine replacement?
No, there’s no set interval. Replace only if faulty. Good oil, clean connectors, and fixing any cam cover oil seepage will usually keep them happy well past high kilometres.