Parts for your 2016 Mazda Cx-5-Throttle position sensors

2016 Mazda CX-5 Throttle Position Sensor (TPS)

Based on Mazda’s own technical literature, the 2016 Mazda CX-5 does use throttle position sensors. The Mazda Workshop Manual for the KE-series CX-5 (petrol and diesel) describes dual throttle valve position sensors integrated into the electronic throttle body, and lists related DTCs such as P0121, P0122 and P0123. Mazda’s wiring diagrams show TP1/TP2 circuits to the PCM, and the Mazda parts catalogue supplies the throttle body assembly with the sensor built in. Independent data services such as Autodata and Mitchell1 echo this setup. So, the TPS is relevant and fitted on this model.

On the 2016 CX-5, the TPS is part of the drive-by-wire system. Rather than a cable, an electric motor opens the throttle plate while the built-in sensors report exact plate angle back to the PCM. That feedback lets the engine computer manage airflow, fuel delivery and ignition timing for smooth take-off, clean idle and tidy emissions.

For the 2.0L and 2.5L SKYACTIV-G petrol engines, the TPS is not a separate bolt-on item—it’s integrated into the throttle body. If the sensor fails or readings don’t track correctly, the usual fix is to replace the complete throttle body assembly. On the 2.2L SKYACTIV-D diesel, a throttle valve (sometimes called an intake shutter) is used for EGR control and shutdown, its position sensor is likewise paired with the actuator.

Typical signs the TPS isn’t happy include erratic idle, flat spots on acceleration, sudden limp-home behaviour, or a glowing MIL with TPS-related codes. It’s not a scheduled service item, but during routine servicing it’s sensible for a workshop to:

• Scan for codes and check live data for TP1/TP2 agreement and smooth sweep.
• Inspect the throttle body for contamination and carefully clean the bore and plate if carbon is building up—never force the plate by hand.
• Check connectors and earths under the bonnet for corrosion or moisture.

When replacement is required, a quality workshop will disconnect the battery, swap the assembly with a new gasket, verify wiring integrity, and carry out a throttle/idle learn with a scan tool. On these Mazdas, an adaptation reset helps the PCM relearn the new sensor’s baseline so idle and tip-in behave properly. Using the correct torque on fasteners and ensuring no vacuum leaks around the gasket avoids repeat faults. With clean airpaths and good electrical connections, the TPS will typically run for many hundreds of thousands of kilometres without drama.

Popular question 1: What are the common TPS symptoms on a 2016 Mazda CX-5?

Owners usually notice a check engine light, uneven idle, hesitation on take-off, poor fuel economy, or limp mode. A scan often reveals P0121–P0123 or mismatch between TP1 and TP2. If data doesn’t sweep smoothly as the throttle opens, the sensor or throttle body may be on the way out.

Popular question 2: Can the TPS be replaced separately on the 2016 CX-5?

On the petrol engines, the TPS is integrated into the electronic throttle body, so it’s serviced as a complete unit. Diesel models use a throttle valve/actuator with an internal position sensor as well. Workshops replace the assembly and then perform an adaptation/idle learn.

Popular question 3: Does a TPS fault always mean the throttle body is bad?

Not always. Wiring issues, poor grounds, a weak battery, or a dirty throttle bore can mimic TPS faults. A proper diagnosis with live data, reference voltage checks and continuity testing helps avoid unnecessary parts replacement.