Parts for your 2010 Mazda Premacy-Throttle position sensors

2010 Mazda Premacy throttle position sensors (TPS)

Based on Mazda’s technical literature for the CR-chassis Premacy (Mazda 5) around MY2010—including the Mazda Workshop Manual engine control section, wiring diagrams, and the Mazda Electronic Parts Catalogue—the 2010 Mazda Premacy uses electronic throttle control with a throttle position sensor integrated into the throttle body assembly on petrol engines (e.g., LF/L3 series). The manual also lists related OBD‑II diagnostics such as P0121/P0122/P0123 and P0221 that directly reference the throttle position circuit. For diesel variants, an intake throttle/shutter valve with a position sensor is similarly documented. These sources confirm that a TPS is present and relevant, typically as dual (redundant) position tracks built into the throttle body and not serviced separately from the assembly.

The throttle position sensor on a 2010 Mazda Premacy tells the ECU exactly how far the throttle plate is open, so fuelling, ignition timing, and idle control all stay on song. With drive‑by‑wire, the ECU compares the accelerator pedal position with the throttle’s own position feedback from the TPS, keeping response smooth and helping stability systems do their thing. If the TPS goes out of whack, the car can feel flat, surgey, or drop into limp mode, and the dash might throw a check‑engine light.

As part of regular servicing, it’s smart to keep an eye on the throttle body and its TPS. While the TPS is usually built into the throttle body on this model, owners can prevent grief by:

• Keeping the throttle bore and plate clean with a sensor‑safe throttle cleaner (avoid drowning the electronics).
• Inspecting the TPS/actuator connector for corrosion, oil wicking, or broken locking tabs.
• Checking for stored DTCs if the idle hunts, the car hesitates, or fuel economy tanks.

When replacement time comes, many Premacy throttle bodies are supplied as a complete unit (motor + TPS). After fitting, a throttle/idle relearn is often required—ideally with a scan tool—to set the blade position and idle air flow. Battery voltage matters too, low system voltage can trigger spurious throttle faults. Technicians typically verify the dual‑track TPS signals match the workshop specs and that the wiring harness isn’t chafed near the engine mount or under the intake. Genuine or quality OEM‑equivalent throttle bodies tend to behave best with Mazda’s calibration.

Symptoms that point to TPS trouble on this model include sudden limp‑home, erratic idle, stalling when coming to a stop, flat spots off the line, and codes like P0121–P0123. Tackling those early can save a long walk and keep the Premacy feeling crisp on school runs and motorway hauls alike.

Popular questions

Does a 2010 Mazda Premacy have a throttle position sensor?
Yes. The 2010 Premacy (CR) uses electronic throttle control with a TPS built into the throttle body on petrol engines, and a position sensor on the intake throttle/shutter for diesels. It’s a key input for the ECU and is monitored by OBD‑II.

What are the common signs of a failing TPS on a 2010 Premacy?
Owners often notice a check‑engine light, erratic idle, hesitation, poor fuel economy, or limp mode. Scan tools may show codes like P0121–P0123 or related throttle actuator faults. A quick visual of the connector and a throttle body clean can help before replacement.

Can the TPS be replaced separately from the throttle body?
On most 2010 Premacy petrol variants, the TPS is integrated and not sold separately—replacement is typically the entire throttle body. After installation, a throttle/idle relearn with a scan tool is recommended to restore smooth operation.