Parts for your 2002 Nissan Navara-Throttle position sensors

2002 Nissan Navara throttle position sensor (TPS) — what’s fitted and how it helps

Technical sources indicate the 2002 Nissan Navara (D22) may or may not use a traditional throttle position sensor, depending on engine. The Nissan D22 Factory Service Manual (Engine Control sections) specifies a TPS mounted on the throttle body for KA24DE petrol variants. For the diesel range (ZD30DDTi and YD25DDTi), Nissan documentation describes an electronic accelerator pedal position (APP) sensor and no conventional throttle plate/TPS, with air control managed by the ECU and, where fitted, an intake shut-off/throttle valve for EGR and shutdown. This is corroborated by the Nissan FAST electronic parts catalogue for D22 and independent workshop data (Autodata, Gregory’s/Haynes for D22), which list a TPS for KA24 petrol models and an APP sensor for diesels.

For 2002 Navara models fitted with a TPS (notably KA24DE petrol), this small sensor on the throttle body tells the ECU exactly how far the throttle shaft has been opened. That signal helps the ECU fine‑tune fuelling, ignition timing, idle speed control, and—even in some trims—automatic transmission shift logic. When the TPS reads smoothly from closed to wide open throttle, the ute responds crisply, when it’s worn or out of adjustment, owners may notice flat spots, hunting idle, poor fuel economy, or a check engine light with codes such as P0120–P0123.

As part of routine servicing on a KA24DE‑equipped 2002 Navara, it’s smart to give the TPS and its harness a once‑over. Under the bonnet, inspect the connector for corrosion, broken locks, and oil ingress. A careful back‑probe with a multimeter (key on, engine off) should show a steady voltage sweep as the throttle is opened—no dead spots or sudden jumps. If the sensor body is cracked, the sweep is erratic, or resistance is out of spec, replacement is the go.

Many TPS units on these throttle bodies are slotted for fine adjustment. After fitting the new part, align it so the closed‑throttle voltage sits in the factory window (commonly around 0.45–0.55 V), and confirm the idle switch function where applicable. Nip the screws up gently—no need to swing off a spanner—and don’t overtighten into the alloy housing. Once fitted, perform the throttle closed‑position/idle learn procedure outlined in the service manual, clear any stored codes, and take the Nav for a short drive to confirm clean tip‑in and consistent idle.

Diesel 2002 Navaras don’t use a traditional TPS because they don’t meter load with a throttle plate, the ECU looks at the accelerator pedal position sensor and other inputs to manage fuelling. That’s why parts catalogues split TPS (petrol) and APP (diesel)—ordering by VIN or engine code avoids mix‑ups.

• Common TPS symptoms on KA24DE: hesitation, surging, harsh/late shifts (auto), high/low idle, poor economy, MIL on.
• Service tips: check wiring first, test sweep with a meter, adjust if slotted, perform idle learn after replacement.

Popular questions about 2002 Nissan Navara TPS

Does a 2002 Navara diesel have a throttle position sensor?

No—diesel D22 models (YD25DDTi, ZD30DDTi) use an accelerator pedal position (APP) sensor instead of a traditional TPS on a throttle body. Some have an intake shut‑off/throttle valve for EGR and smooth shutdown, but it isn’t monitored by a conventional TPS. Ordering by VIN/engine ensures the right sensor lands on the bench.

What are the signs the TPS is failing on a 2002 Navara petrol?

Owners often report flat spots on take‑off, a hunting or stalling idle, rough gear changes on autos, and a check engine light. Scan tools commonly show P0120–P0123 range/performance or circuit faults. A multimeter sweep test of the TPS will usually confirm a worn track or dead spot.

Can the TPS be cleaned, or does it need replacing?

The TPS is a sealed potentiometer, it isn’t a serviceable item internally. Cleaning the connector and ensuring a clean earth can help, but if the voltage sweep is erratic or out of spec, replacement is the fix. After fitting, adjust if required and run the ECU’s throttle/idle learn so it behaves properly in traffic.