Parts for your 1999 Nissan Pulsar-Map sensor

1999 Nissan Pulsar MAP sensor: do you actually have one?

For the 1999 Nissan Pulsar (N15 series, as sold in Australia and New Zealand with GA16DE 1.6L and SR20DE 2.0L petrol engines), a separate MAP sensor isn’t fitted or used for engine load calculation. Technical references back this up: the Nissan Factory Service Manual for the N15 (EC – Engine Control system section) shows a hot‑wire Mass Air Flow (MAF) sensor as the primary intake measurement device, with no manifold absolute pressure sensor in the system. The Nissan FAST parts catalogue for N15 GA16DE/SR20DE lists no MAP sensor as a service part, and the FSM wiring diagrams show ECM pins for the MAF but none for a MAP. Aftermarket manuals used in AU/NZ workshops (e.g., Gregory’s/Haynes) also describe a MAF‑based strategy, not speed‑density (MAP/IAT/RPM).

Why no MAP sensor? Nissan engineered these Pulsars to use a mass‑air strategy. A MAF directly measures the amount of air entering the engine, which gives accurate fuelling and stable drivability across Aussie and Kiwi conditions without needing a dedicated manifold pressure input. A speed‑density setup (which relies on a MAP sensor) simply wasn’t the chosen design for these naturally aspirated N15 models.

Owners sometimes go looking for a MAP sensor when chasing rough idle, flat spots, or fault codes on a scan tool. On a 1999 Pulsar, it’s almost always the MAF, a vacuum leak, or another sensor at play. If a workshop has suggested a “MAP” replacement, they’re very likely referring to the MAF on the intake duct near the airbox.

• Commonly mistaken parts: the MAF on the intake snorkel, the intake air temperature sensor (often integrated with the MAF), the throttle position sensor, and EVAP/EGR vacuum components. None of these is a MAP sensor.
• Good maintenance moves: keep the intake plumbing airtight, use proper MAF cleaner (not carb/brake cleaner) if contamination is suspected, and check for split hoses under the bonnet.
• Seeing P0105/P0106 on a generic scanner? On this model that’s usually a mislabelled or inferred code, investigate the MAF, vacuum leaks, and wiring rather than hunting for a non‑existent MAP.

FAQs

Does a 1999 Nissan Pulsar have a MAP sensor?
No. The N15 Pulsar uses a hot‑wire MAF to measure intake air and does not include a dedicated MAP sensor in the engine control system. This is documented in the N15 Factory Service Manual and reflected in the Nissan parts catalogue.

Where would a MAP sensor be on a 1999 Pulsar?
There isn’t one to find. If someone has asked you to replace a “MAP”, they almost certainly mean the MAF, which sits in the intake ducting near the airbox. Also check the vacuum hoses and the throttle body for issues that can mimic MAP‑type faults.

Why is my scanner showing a MAP code (like P0105) if there’s no MAP?
Many generic tools display standard OBD terms. On the N15 Pulsar, such a code usually points to a MAF signal issue, a vacuum leak, or wiring/earth problems. Start with the MAF, then look for split hoses or intake leaks, and inspect connectors and grounds.