Parts for your 2001 Nissan Pulsar-Throttle position sensors

2001 Nissan Pulsar throttle-position-sensor (TPS)

Yes, the 2001 Nissan Pulsar (N16 series) uses a throttle-position-sensor. Technical sources including the Nissan Pulsar/Almera N16 Electronic Service Manual (EC section) specify a TPS mounted on the throttle body for QG16DE and QG18DE engines, with diagnostic routines and specifications, plus OBD‑II codes P0120–P0123 dedicated to TPS performance and circuit faults. Workshop data from common trade references for AU/NZ models also list TPS testing procedures and closed-throttle switch checks for this vehicle.

On the 2001 Pulsar, the TPS tells the engine control module exactly how far the throttle plate is opened. That signal helps the ECU meter fuel, adjust ignition timing, manage idle control and, on autos, tidy up shift timing and kickdown. When it’s healthy, throttle response feels crisp, the idle behaves, and fuel economy stays on point.

It’s not a regular replacement item, but it’s smart to inspect it whenever the throttle body is being cleaned—typically every 40,000–60,000 kilometres on a well-loved Pulsar. Common clues the throttle-position-sensor is on the way out include a hunting idle, flat spots on acceleration, random stalling at lights, harsh or late shifts (auto), poor fuel economy and a check engine light with codes like P0120–P0123.

• Quick care tips under the bonnet:
  • Keep the throttle body clean with MAF-safe cleaner—don’t soak the sensor itself.
  • Check the TPS connector for brittle wiring, corrosion or a loose fit.
  • If removing the sensor, mark its original position to preserve adjustment.

Replacing the TPS on a Pulsar N16 is straightforward with basic tools. Disconnect the battery, remove the intake duct, unplug the connector and undo the two small screws. On many QG engines the TPS includes a closed‑throttle switch and needs a light rotational adjustment on install so the base voltage and “Closed Throttle” status are correct. A scan tool helps confirm idle switch ON and a smooth TPS percentage rise from closed to wide open. After refit, perform Nissan’s throttle closed‑position learning and idle air volume learn. That settles the idle and prevents stalling. If you don’t have a scan tool, most workshops can do the reset in minutes.

Go for a quality OEM-equivalent sensor and avoid overtightening the mounting screws—snug is enough. Done right, the Pulsar’s throttle-position-sensor quietly does its job for years, keeping the little Nissan feeling sharp and easy on fuel.

• Where is the TPS on a 2001 Nissan Pulsar?

It’s bolted to the side of the throttle body, under the intake duct. You’ll spot a small black sensor with a two- or three‑wire plug. Remove the duct for clear access.

• Does the TPS need calibration after replacement?

Yes. The sensor position needs to be set so the ECU sees “Closed Throttle” at idle and a smooth voltage sweep to wide open. After fitting, carry out throttle closed‑position learning and idle air volume learn.

• What fault codes point to a bad TPS on a Pulsar N16?

Typical codes are P0120 (TPS circuit), P0121 (range/performance), P0122 (low input) and P0123 (high input). You may also see rough idle or stalling alongside these.