Parts for your 2004 Nissan Navara-Throttle position sensors

2004 Nissan Navara throttle-position-sensors: what’s fitted and what matters

Technical sources make it clear that whether a 2004 Nissan Navara uses a throttle-position-sensor depends on engine type. The Nissan Navara D22 Service Manual for the KA24DE petrol (Engine Control, EC section) specifies a throttle-position-sensor mounted on the throttle body, with factory test procedures and adjustment steps. By contrast, the D22 ZD30DDT diesel Engine Control documentation describes an accelerator pedal position (APP) sensor feeding the ECU and no conventional throttle plate for load control, Bosch VP44 system literature likewise explains that diesel torque is managed by injected fuel quantity, not an air throttle. That means a traditional throttle-position-sensor is relevant to 2004 Navara petrol models, but generally not applicable to the 3.0L ZD30 diesel sold widely in Australia and New Zealand.

For ZD30 diesel owners: a standard throttle-position-sensor isn’t used because the engine doesn’t meter power with a throttle blade. Instead, the ECU reads the APP sensor and controls fuelling at the injection pump. Some diesels do have an intake shut-off/throttle control valve for EGR and smooth shutdown, and it may have its own position feedback, but it’s not the driver-demand TPS you’d replace on a petrol throttle body.

For KA24DE petrol owners: the throttle-position-sensor (TPS) is a small, slotted sensor on the throttle body that tells the ECU exactly how far the throttle is open. It helps nail crisp tip-in, steady idle, smooth shifts (on autos) and good fuel economy. When the TPS wears or drifts out of spec, drivers can see flat spots, erratic idle, harsh gear changes, or codes like P0120–P0123.

Servicing advice for the petrol TPS on a 2004 Navara:

• Symptoms check: look for hesitation, surge, high idle or inconsistent kickdown. Scan for TPS-related DTCs and live data that doesn’t sweep smoothly from closed to wide open.
• Inspection: verify the connector isn’t oily or corroded, and the throttle plate moves freely. On many Nissans the TPS assembly also incorporates an idle/closed-throttle switch—both need to read correctly.
• Testing: with a multimeter or scan tool, confirm a smooth voltage rise as the throttle opens. Any dead spots or jumps mean it’s time to replace.
• Replacement: disconnect the battery, mark the original sensor position, swap the unit, then rotate slightly to set the specified closed-throttle voltage per the service manual. Tighten screws evenly—don’t over-torque.
• Relearn: perform an idle/throttle position relearn (manual procedure or scan tool) so the ECU knows the new baseline. Clear codes and road test.
• Quality parts: choose a reputable brand or genuine Nissan part, cheap sensors can introduce erratic readings.

Because most 2004 Navaras in AU/NZ are ZD30 diesels, it’s worth confirming engine type before ordering a throttle-position-sensor. Petrol KA24DE? Yes, there’s a TPS to maintain. ZD30 diesel? You’ll be dealing with the APP sensor and related diesel control hardware instead.

FAQs

Does the 2004 Nissan Navara diesel have a throttle-position-sensor?

No. The ZD30 diesel uses an accelerator pedal position (APP) sensor to tell the ECU what the driver wants, and the ECU meters fuel at the injection pump. There may be an intake throttle control valve for EGR/shutdown with its own feedback, but it’s not the typical throttle-position-sensor found on petrol engines.

Where is the throttle-position-sensor on a 2004 Navara petrol (KA24DE)?

It’s mounted on the side of the throttle body, opposite the throttle cable/linkage. On many Nissans it’s a combined unit that includes a closed-throttle/idle switch. Two small screws hold it on, it’s slotted so it can be rotated slightly to set the correct closed-throttle signal.

Can a bad TPS cause hard starting or poor fuel economy on a 2004 Navara petrol?

It can. A worn or misadjusted TPS can throw fuelling and ignition timing off during tip-in and transient conditions, leading to rough starts, flat spots, higher consumption and transmission shift quirks. Look for DTCs like P0120–P0123 and verify the TPS signal sweeps smoothly on a scan tool before replacing.