Parts for your 2011 Mazda Premacy-Throttle position sensors

2011 Mazda Premacy throttle position sensor (TPS) — what it does and how to look after it

Technical documentation confirms the 2011 Mazda Premacy is fitted with a throttle position sensor. The factory Mazda Workshop Manual for the Premacy/Mazda5 (CW, 2010–2015) describes the electronic throttle control system using an integrated throttle body with a built‑in TPS and throttle actuator, and it lists TPS‑related diagnostic trouble codes (P0121, P0122, P0123). Mazda’s Electronic Parts Catalogue for the CW series also shows the throttle body assembly incorporating the sensor. So, the throttle-position-sensor is absolutely relevant on this model.

On this Premacy, the TPS tracks how far the throttle plate is opened and feeds that to the engine control module. Because it’s a drive‑by‑wire setup, the ECU compares the TPS feedback to the accelerator pedal position sensor and then fine‑tunes throttle opening for smooth power, stable idle, and decent fuel economy. If that feedback goes wonky, the car can feel lazy, surge, or even drop into limp mode.

It’s worth noting the TPS is part of the throttle body assembly on the 2011 Mazda Premacy, so it’s not usually replaced on its own. During regular servicing, attention to the throttle body keeps the throttle-position-sensor happy:

• Have the throttle body inspected and lightly cleaned every 40,000–60,000 km using sensor‑safe cleaner (no soaking and no hard scrubbing near the shaft or sensor housing).
• Check for air leaks at the intake duct and PCV hoses that can confuse TPS readings.
• Scan for codes if the MIL is on, TPS‑related DTCs include P0121–P0123. Freeze‑frame data helps confirm intermittent faults.

If the sensor fails or readings are out of range, the fix is typically replacing the complete throttle body, fitting a new gasket, and performing a throttle/idle relearn. A workshop scan tool procedure is best, though some vehicles will relearn after a correct key‑on and idle cycle. After battery disconnection or throttle body replacement, an idle recalibration avoids stalling or a high idle.

Common signs pointing at TPS or throttle body issues on a 2011 Premacy include rough or hunting idle, flat spots on take‑off, poor fuel economy, and the MIL with TPS codes. Left alone, it can affect transmission shift quality and emissions. A proper diagnosis should compare TPS and accelerator pedal data, check wiring integrity, and rule out carbon build‑up before calling the throttle-position-sensor faulty.

FAQs

Does a 2011 Mazda Premacy actually have a throttle position sensor?
The 2011 Premacy (Mazda5 CW) does have a TPS, integrated into the electronic throttle body. There’s also an accelerator pedal position sensor on the pedal. The Mazda Workshop Manual covers TPS functions and DTCs P0121–P0123, which relate directly to throttle position signals.

Can the TPS be replaced by itself on a 2011 Premacy?
Not typically. On this model the sensor is part of the throttle body assembly. If the TPS fails or gives erratic readings after proper cleaning and wiring checks, the usual repair is to replace the entire throttle body and perform a throttle/idle relearn with a scan tool.

How often should the throttle-position-sensor be serviced?
The TPS isn’t a scheduled replacement item. As part of servicing your 2011 Mazda Premacy throttle-position-sensors and throttle body, a sensor‑safe clean every 40,000–60,000 km and a visual/wiring check is smart. Replace only when faults are confirmed with diagnostics and live data.