Parts for your 1998 Nissan Primera-Throttle position sensors

1998 Nissan Primera Throttle Position Sensor (TPS)

Technical sources confirm the 1998 Nissan Primera (P11) is fitted with a throttle position sensor. The Nissan Primera P11 Factory Service Manual (Engine Control – EC section) specifies TPS testing and adjustment procedures for the GA16DE and SR20DE engines, including target voltages at closed and wide-open throttle. The Haynes Service & Repair Manual for Nissan Primera (Oct 1990–1999) also details TPS removal, refit and setup on the throttle body. Additionally, Autodata’s Technical Data & Repair for the P11 lists TPS reference values used by the ECU. These documents establish that the TPS is integral to the Primera’s ECCS fuel injection and, on auto models, shift control.

On a 1998 Nissan Primera, the throttle position sensor (TPS) tells the ECU exactly how far the throttle plate is open, so fuelling and ignition timing match the driver’s right foot. It’s also a key input for auto-trans shift timing and kickdown. When it’s healthy, throttle response feels crisp, idle is steady, and fuel use stays sensible across town and on the open road.

Because the TPS is a precision potentiometer fitted to the throttle body, it can wear over time or suffer from dirty connectors. Typical signs include a flat spot on take-off, hunting idle, higher-than-usual fuel consumption, harsh or late shifts (auto), and a check engine light with codes like P0120–P0123 or P0220.

Servicing the Primera? It’s worth giving the TPS some attention under the bonnet:

• Inspect and clean the TPS electrical connector, look for green corrosion or loose pins.
• With a multimeter or scan tool, check the closed-throttle value (typically around 0.45–0.55 V) and confirm a smooth sweep up past 4.0 V at wide open.
• Avoid soaking the sensor in throttle-body cleaner, clean the throttle bore carefully and keep solvents off the TPS.

Replacement is straightforward with basic tools. Disconnect the battery, unplug the connector, and remove the two TPS screws. Note the original orientation, fit the new sensor, and rotate it slightly to set the base voltage within spec (refer to the P11 EC section procedure). Tighten the screws evenly, reconnect, clear any stored codes, and perform an idle learn if required. On models with an integrated idle switch, ensure the closed-throttle switch status reads “ON” at rest via a scan tool. A quality aftermarket or OE sensor that matches the Primera’s engine code will deliver OEM‑style driveability. For peace of mind before a long trip across Kiwi back roads or Aussie highways, this little sensor is a smart check on any 1998 Primera service.

Where is the TPS on a 1998 Nissan Primera?

It’s mounted on the side of the throttle body under the bonnet, fixed by two small screws and connected by a three- or four‑pin plug. You can spot it by following the intake duct to the throttle housing.

Can a dodgy TPS cause shifting issues on auto models?

Yes. The transmission control relies on throttle angle to judge load. A faulty TPS can cause harsh, late or erratic shifts, and poor kickdown behaviour, even if the gearbox itself is fine.

Does a new TPS need calibration?

Usually, yes. After fitting, rotate the sensor to achieve the specified closed‑throttle voltage and confirm a smooth voltage sweep. Many techs also perform an idle/closed-throttle learn with a scan tool to lock it in.