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Parts for your 2018 Nissan Serena-Map sensor
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2018 Nissan Serena MAP sensor – what it does, and how to look after it
Yes, the 2018 Nissan Serena (C27) is fitted with a MAP sensor. Nissan’s C27 Electronic Service Manual (EC – Engine Control) identifies an Intake Manifold Pressure (MAP) sensor as an ECM input and provides diagnostic routines for DTCs P0106–P0108. The Nissan electronic parts catalogue for C27 likewise lists a “Sensor Assy – Pressure, Manifold” for the MR20DD petrol S-HYBRID and the HR12DE engine used in e‑POWER models. That confirms the MAP sensor is relevant to this model range.
On the Serena, the MAP sensor measures the absolute pressure in the intake manifold so the ECM can calculate engine load and air mass, then trim fuel and ignition timing accordingly. It also helps with altitude compensation, EGR flow control, evaporative purge, and idle stability. In e‑POWER variants, it’s just as important, letting the control system manage generator-engine load changes smoothly for better efficiency and low noise.
When it’s healthy, owners see snappy response and tidy fuel economy. When it’s not, it can cause rough idle, hesitation, hard starts, flat spots, or a jump in fuel use. The check engine light may pop up with codes like P0106–P0108. A quick sanity check with a scan tool: Key ON, engine OFF should read close to local barometric pressure, at hot idle expect roughly 25–40 kPa depending on conditions.
There’s no scheduled replacement for the Serena’s MAP sensor, but it’s smart to give it a look whenever the air filter’s serviced (around 40,000 km is a good habit). Make sure the electrical connector is clean and locked in, and that the sensor’s O‑ring is intact. If contamination is evident, only use electronics-safe MAF/MAP cleaner—never soak the tip or use harsh solvents.
- Switch ignition OFF and allow the engine bay to cool.
- Unplug the connector and remove the retaining screw(s).
- Gently twist and pull the sensor free, don’t nick the O‑ring seat.
- Fit a new O‑ring, lightly lubricate it, seat the sensor squarely, and nip the screws to small fastener torque (hand-tight, typically around 6–8 N·m).
- Reconnect, clear any codes, and check live data. A short drive lets the ECM relearn trims.
- Tip: Stick with quality OE-equivalent (often Hitachi for Nissan) to avoid noisy signals and repeat faults.
- If drivability issues persist, rule out vacuum leaks and a dirty throttle body before condemning the new sensor.
Popular questions about the 2018 Nissan Serena MAP sensor
Where is the MAP sensor on a 2018 Serena?
It’s mounted to the intake manifold on the engine side of the bay. Look for a small two‑bolt sensor with an electrical plug, typically on the upper manifold. Some trims tuck it near the throttle body. If unsure, follow the harness from the manifold area, it’s a short run.
Can a dirty MAP sensor cause poor fuel economy?
Absolutely. If it reads low or high versus actual manifold pressure, the ECM will miscalculate load, often enriching the mixture. That shows up as higher fuel use, a lazy throttle, and sometimes a rich exhaust smell. Cleaning with the right electronics-safe spray can restore normal readings if contamination is the only issue.
Do I need to reprogram the ECU after replacing the MAP sensor?
No reprogramming is normally required. Clear any stored codes and take the Serena for a mixed-condition drive so the ECM can fine‑tune fuel trims. If the battery was disconnected for a while, an idle learn may help, but most cars settle after a short drive.
