Parts for your 2009 Mazda 6-Throttle position sensors

2009 Mazda 6 Throttle Position Sensor (TPS)

Technical references confirm the 2009 Mazda 6 (GH series) does use a throttle position sensor. The factory Workshop Manual for the GH Mazda 6 describes an electronic throttle control system with dual throttle position sensors integrated into the throttle body, alongside an accelerator pedal position (APP) sensor at the pedal. Common diagnostic sections and wiring diagrams in the Mazda manual, as well as professional databases such as Autodata/AllData, list TP Sensor 1 and TP Sensor 2 signals to the PCM and relevant DTCs (e.g., P0120–P0124, P2135), which verifies that TPS is fitted and monitored on this model.

On the 2009 Mazda 6, the throttle position sensors are built into the electronic throttle body and constantly report how far the throttle plate is open. The PCM uses those readings to balance air, fuel, and spark for smooth take-offs, steady cruising, and clean emissions. With a drive-by-wire setup, there’s no physical cable—just precise sensor feedback and an electric motor moving the throttle plate. That’s why crisp throttle response and decent fuel economy rely on healthy TPS signals and their twin-track agreement (TP1 and TP2).

As part of regular servicing, it’s smart to:

• Scan for codes and live data if the idle hunts, the car hesitates, or there’s a sudden limp-home. Look for TP1/TP2 correlation issues and codes like P0121–P0123 or P2135.
• Inspect the throttle body connector for loose pins, moisture, or green corrosion. Clean and reseat as needed.
• Clean the throttle bore gently with throttle-body-safe cleaner. Avoid flooding the shaft or forcing the plate by hand.
• After cleaning or replacement, perform an idle/throttle relearn. A scan tool procedure is ideal, otherwise, a key-on/engine-off cycle followed by a warm idle can allow the PCM to settle trims.

On most GH models, the TPS is non-serviceable separately—if a sensor fails, the complete throttle body assembly is replaced. That sounds bigger than it is. Expect a new gasket, careful removal of the intake ducting, unplugging the harness, and torqueing the throttle body back to spec. Always disconnect the battery before unplugging the throttle, avoid prying on the plate, and check for software updates if a workshop scan tool flags one.

Typical fault signs include surging at steady speed, a stubborn idle, a dead spot on tip-in, or the traction/engine lights tagging in together. Leaving TPS faults to linger can cost fuel and stress the transmission with messy shift timing, so getting onto it early is a solid move for reliability and driveability across Aussie and Kiwi roads.

• Pro tips:
  • Use OEM-quality throttle gaskets and don’t overtighten the bolts.
  • Keep the intake duct clamps snug to prevent false-air issues that can mimic TPS problems.

Popular questions about 2009 Mazda 6 throttle position sensors

Does the 2009 Mazda 6 actually have a TPS?
Yes. The GH-series Mazda 6 uses electronic throttle control with dual throttle position sensors built into the throttle body, plus an accelerator pedal position sensor at the pedal. The PCM cross-checks the two TPS tracks for accuracy, which is why “correlation” fault codes appear if they disagree.

Can the TPS be replaced on its own, or is it part of the throttle body?
On most 2009 Mazda 6 variants, the TPS is not a separate service part. If the sensor fails or the correlation is out of spec, the standard repair is to replace the complete throttle body assembly and then carry out a throttle/idle relearn with a scan tool.

What are the common symptoms of a failing TPS on this model?
Drivers may notice erratic idle, hesitation on light throttle, poor fuel economy, sudden limp mode, or the stability/engine lights coming on together. A scan will usually show codes like P0121–P0123 or P2135, and live data will reveal disagreement between TP1 and TP2.