Parts for your 2000 Nissan Serena-Throttle position sensors

2000 Nissan Serena throttle position sensor (TPS)

Yes, the 2000 Nissan Serena (C24) is fitted with a throttle position sensor. Technical references including the Nissan Serena C24 Factory Service Manual (EC – Engine Control section, for SR20DE/QR20DE), the Nissan FAST electronic parts catalogue for C24 models, and common OEM parts listings for SR/QR throttle bodies all show a TPS on the throttle body assembly. On cable‑operated SR20DE units it’s an adjustable sensor with an idle switch, on some later QR engines it may be integrated into the throttle body module.

The TPS tells the engine control unit exactly how far the throttle is open. That data drives fuelling, ignition timing, idle control and, on auto models, shift and kickdown behaviour. When it’s healthy, the Serena pulls cleanly off the line, idles smoothly and uses fuel sensibly. When it’s crook, it can hesitate, surge or hang onto gears longer than it should.

For the cable-throttle SR20DE, the TPS is a serviceable part. During routine servicing, it’s worth checking:

• Live data or voltage sweep: about 0.45–0.55 V at closed throttle rising smoothly to roughly 4.0–4.5 V at wide open throttle.
• Idle switch continuity at closed throttle (where applicable).
• Harness condition and connector corrosion, especially if the throttle body has seen a lot of cleaning spray.

Typical warning signs include erratic idle, flat spots on take‑off, increased fuel use, harsh or delayed shifts, and the MIL with codes like P0120–P0123/P0220. Don’t forget a dirty throttle plate or vacuum leak can mimic TPS faults, so a quick visual and a smoke test before parts darts is smart.

Replacement on the SR20DE is straightforward: disconnect the battery, unplug the sensor, remove the two screws, fit the new unit, then rotate it slightly to set the closed‑throttle voltage. Lock it down and clear codes, then verify with a scan tool. If your Serena has a drive‑by‑wire QR throttle body, the TPS is built into the assembly, replacement means swapping the throttle body and performing an idle air volume learn/throttle relearn with a capable scan tool.

With the right setup and a quick calibration check, a fresh or correctly adjusted TPS brings back smooth response and keeps the 2000 Serena happy on Kiwi and Aussie roads.

Where is the TPS on a 2000 Nissan Serena?

On SR20DE cable‑throttle models, it’s bolted to the side of the throttle body, opposite the throttle cable cam, with a 3‑pin connector. On QR engines with electronic throttle, the sensor is integrated into the throttle body housing and isn’t a separate bolt‑on unit.

What symptoms point to a failing TPS on a Serena C24?

Common clues are erratic idle, hesitation or surging when tipping in the throttle, higher fuel use, harsh or delayed auto shifts, and the check engine light with codes like P0120–P0123. A choppy voltage sweep when slowly opening the throttle is a dead giveaway.

Does the TPS need calibration after replacement?

For SR20DE cable‑throttle units, yes—set closed‑throttle voltage to roughly 0.45–0.55 V and confirm a smooth rise to about 4+ V at wide open. For drive‑by‑wire QR throttle bodies, perform an idle air volume learn/throttle relearn with a scan tool after replacement so the ECU knows the new baseline.