Parts for your 2007 Mazda Premacy-Throttle position sensors

2007 Mazda Premacy throttle position sensor: what it does and how to look after it

Based on Mazda’s own technical literature — notably the Mazda Global Service Support (MGSS) Workshop Manual for Premacy/CR (engine control: Electronic Throttle Control) and the 2007 Premacy (CR) wiring diagrams — this model does use throttle position sensors. They’re built into the electronic throttle body as two redundant tracks (often referenced as TP1/TP2), and are monitored alongside the accelerator pedal position sensor. So yes, a throttle position sensor is relevant on a 2007 Mazda Premacy, but it’s integrated rather than a separate, bolt-on unit.

On this Premacy, the throttle position sensors tell the engine control module exactly how far the throttle plate’s open. That info is critical for fuelling, ignition timing, idle control, cruise, and keeping things smooth when the air con kicks in. The ECU cross‑checks the two TPS signals with the accelerator pedal sensor, which helps catch faults early and keeps the drive‑by‑wire system safe.

Because the TPS is built into the throttle body, replacement usually means swapping the complete throttle body assembly. That sounds big, but it’s straightforward for a competent tech. Always fit a new gasket, keep the bore clean, and tighten the fasteners evenly to the workshop‑manual spec (typically around 8–10 N·m — confirm for your exact engine). After replacement or a thorough clean, an idle/throttle relearn is often needed. Many Premacy models will self‑learn after a warm‑up and a few minutes idling with all accessories off, but using a proper scan tool to run the throttle/idle learn routine is the tidy way to do it.

Signs the TPS/throttle body is playing up include a fluttery idle, hesitation, surging, sudden loss of power (limp mode), and a lit check‑engine lamp. Common codes the manual lists for this system include P0121, P0122, P0123, P0221 and P2135, along with actuator‑related faults.

• During servicing, clean the throttle bore every 40–60,000 km with a sensor‑safe cleaner. Don’t force the blade open on a drive‑by‑wire unit.
• Inspect the connector and loom near the throttle body for heat or oil damage, and make sure battery voltage and grounds are healthy — low volts can trigger throttle faults.
• Don’t mix up the throttle position sensors with the accelerator pedal sensor — both are part of the system and can set similar codes.

Looked after properly, the Premacy’s electronic throttle and its twin TPS tracks are reliable, and keeping them clean and correctly calibrated will help it start crisply, idle neatly and pull strongly.

Popular questions about 2007 Mazda Premacy throttle position sensors

Is the TPS on a 2007 Premacy replaceable on its own?
On this model the TPS is integrated into the electronic throttle body. It isn’t serviced separately, so a confirmed TPS fault usually means replacing the complete throttle body assembly, followed by an idle/throttle relearn.

Which fault codes point to a TPS problem?
Typical codes include P0121, P0122, P0123, P0221 and P2135. You may also see throttle actuator or correlation codes. Always check live data for the two TPS tracks and the accelerator pedal sensor to confirm before replacing parts.

Will cleaning the throttle fix TPS issues?
If the issue is stickiness or a dirty throttle plate causing unstable idle, a careful clean can sort it. If the fault is electrical within the TPS tracks or there’s correlation failure, cleaning won’t help — the throttle body will need replacing.