Parts for your 2001 Mazda Premacy-Throttle position sensors

2001 Mazda Premacy throttle position sensor: what it does and how to look after it

Based on Mazda’s own technical literature, the 2001 Mazda Premacy (CP series, petrol FP/FS engines) is fitted with a throttle position sensor (TPS). The Mazda Premacy Workshop Manual for 1999–2005 lists a 3‑wire TPS on the throttle body within the Engine Control System, and the factory diagnostic section covers related OBD‑II trouble codes P0120–P0124. Mazda’s electronic parts catalogue for CP8W/CPFW also shows the TPS as a serviceable component. So yes—this model definitely uses a TPS.

On the 2001 Premacy, the TPS tells the engine control unit exactly how far the throttle plate is opened. That signal helps the ECU manage fuel delivery, ignition timing, idle speed control and deceleration fuel cut. On autos, it also influences shift timing. Because these Premacys use a cable‑actuated throttle, the TPS is a simple, reliable potentiometer mounted on the throttle body under the bonnet.

As part of routine servicing, a quick TPS check can save headaches. Look for split insulation or corrosion at the connector, and make sure the throttle body is clean so the closed‑throttle position is consistent. If you’ve got a multimeter or scan tool, confirm the closed‑throttle voltage sits roughly around 0.4–0.7 V and rises smoothly to about 4.0–4.8 V at wide open throttle. Any flat spots, sudden drops or dead zones point to wear.

Common signs it’s on the way out include erratic idle, off‑the‑line hesitation, a flat spot on light throttle, surging on cruise, harsh or odd shifts (auto), and the check engine light with codes P0120–P0124.

• Replacement is straightforward: disconnect the battery, unplug the connector, remove the two TPS screws, fit the new unit, then reconnect.
• If the sensor is adjustable (slotted holes), set the closed‑throttle voltage to spec using a scan tool or multimeter. Some non‑adjustable types self‑calibrate.
• Finish with an idle learn: warm the engine, A/C off, let it idle a few minutes, or perform a KAM reset with a scan tool.

There isn’t a fixed replacement interval, treat it as “inspect and test” during major services (every 20,000–30,000 km is a good rhythm). Keep the connector clean, ensure good earths, and the TPS on a 2001 Premacy will usually run for heaps of kays without drama.

Popular questions about 2001 Mazda Premacy throttle position sensors

What are the symptoms of a failing TPS on a 2001 Premacy?
Drivers often notice rough or wandering idle, hesitations on take‑off, flat spots around light throttle, sudden surges, and sometimes abrupt gear changes on autos. The check engine light may illuminate with codes like P0120–P0124. If cleaning the throttle body and checking for vacuum leaks doesn’t help, test the TPS signal sweep.

Can a TPS be cleaned, or does it need replacing?
The connector and throttle body can be cleaned, which often restores stable readings if corrosion or grime is the culprit. The TPS itself is a sealed potentiometer, once the internal track wears or goes noisy, replacement is the go. Don’t flood the sensor with cleaner—limit cleaning to the plug and throttle bore.

Do I need to calibrate a new TPS on the Premacy?
Some aftermarket and OE sensors have slotted mounting holes for adjustment, set the closed‑throttle voltage with a multimeter or via a scan tool’s live data. Others are non‑adjustable and self‑index to the throttle shaft. Either way, complete an idle learn/KAM reset so the ECU adapts quickly and drivability is spot on.