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Parts for your 1995 Nissan Primera-Throttle position sensors
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1995 Nissan Primera throttle position sensor: what it does and how to look after it
Technical sources confirm the 1995 Nissan Primera does use a throttle position sensor (TPS). The Nissan Primera P10 Factory Service Manual (EC section, 1995), common workshop references like Autodata, and the Haynes manual for Primera 1990–1999 all document a TPS on the throttle body for GA16DE and SR20DE petrol engines, and an accelerator/throttle position input on the CD20 diesel pump. It’s part of Nissan’s ECCS engine management and is critical to fuelling and ignition control.
On this model, the TPS tells the engine control module how far the throttle is open, so it can trim fuel, tweak ignition timing, manage decel fuel cut, and smooth out auto transmission shifts where fitted. Many P10 units combine a variable potentiometer with an idle switch in the same housing, giving the ECM both fine throttle angle and a crisp “throttle closed” signal for stable idle.
Owners will notice a crook TPS as hesitation off the line, flat spots, hunting or high idle, stalling when coming to a stop, jumpy revs, or harsh gear changes in autos. Fuel use can climb, and a fault code for TPS may be stored on OBD1 systems.
Servicing is straightforward. During routine maintenance, it’s smart to:
- Inspect the TPS connector for verdigris, brittle wiring, and loose pins.
- Clean the throttle body (avoid drowning the sensor in solvent).
- Check base voltage and sweep: typically around 0.4–0.6 V closed, rising smoothly to roughly 4.0–4.5 V at wide open. No dead spots.
- Verify the idle switch clicks over right as the throttle closes and shows continuity at rest.
Replacement is a quick job under the bonnet: disconnect the plug, remove two screws, swap the unit, then align it. The TPS is slotted so it can be rotated slightly—set closed‑throttle voltage to spec or ensure the idle switch just engages at rest. Don’t overtighten the screws, they thread into the throttle body. After fitting, warm the engine and let it idle so the ECU can relearn. If the idle’s still ordinary, a base‑idle and TPS alignment procedure as outlined in the FSM is the go.
Using a quality sensor (genuine or a reputable aftermarket brand) saves headaches. With a good TPS, the Primera feels crisper off idle, shifts cleaner in autos, and runs more efficiently over long Kiwi and Aussie kilometres.
Popular questions
Where is the TPS on a 1995 Primera?
It’s bolted to the side of the throttle body on petrol GA16DE and SR20DE engines, opposite the throttle cable quadrant. On CD20 diesel models, an accelerator/throttle position input is mounted to the pump/linkage to inform the ECU of pedal/throttle position.
What are the signs the TPS is failing?
Common clues include a surging or wandering idle, a flat spot when taking off, sudden hesitation on tip‑in, higher fuel use, and abrupt auto shifts. A scan or blink‑code check may reveal a stored TPS fault. A smooth voltage sweep test with a multimeter usually confirms the diagnosis.
Can the TPS be adjusted or does it just plug in?
Most 1995 Primera sensors are adjustable. After installation, rotate the sensor slightly in its slotted holes to achieve the correct closed‑throttle voltage and to ensure the idle switch engages at rest. A basic multimeter and the workshop spec are all that’s needed, a scan tool helps but isn’t mandatory on OBD1 cars.
