Parts for your 2002 Mazda 6-Throttle position sensors

2002 Mazda 6 Throttle Position Sensor (TPS) — What It Does and How to Look After It

Yes — the 2002 Mazda 6 (GG/GY) does use a throttle position sensor. Technical references including the Mazda Factory Workshop Manual for the GG/GY series (Engine Control System section), Autodata service specifications, and Haynes Mazda 6 coverage show the throttle body is part of an electronic throttle control system and includes dual throttle position sensors. Some variants also have an accelerator pedal position sensor at the pedal, but the TPS on the throttle body remains essential to how the engine is managed.

The TPS monitors the angle of the throttle plate and feeds that to the PCM so it can juggle fuel delivery, ignition timing, idle speed control, cruise control, and (on autos) shift timing. On the GG/GY it’s a non-adjustable, typically dual-track sensor for redundancy and safety. Under the bonnet, it lives on the throttle body at the intake manifold — not on the pedal. At closed throttle it reports a low voltage and ramps up towards wide-open throttle, allowing the PCM to spot quick stabs of the pedal and smooth cruising alike.

As part of regular servicing, there’s no scheduled replacement for the TPS, but a few smart checks keep things sweet:

• Keep the throttle bore clean. Use throttle-body-safe cleaner and avoid flooding the sensor area.
• Inspect the connector for corrosion, broken locks, or chafed wiring — common culprits for random faults.
• If replacing the throttle body/TPS, carry out an ETC/idle relearn with a capable scan tool, or perform a keep-alive-memory reset and allow a proper idle relearn. Don’t force the throttle plate open by hand on drive-by-wire units.

Signs the TPS is on the fritz include rough or high idle, flat spots, surging, stalling at lights, kickdown oddities on autos, and the MIL glowing. Fault codes can include P0121, P0122, P0123, P0221–P0223 and “throttle range/performance” messages. Because the TPS is integral to the throttle body on many 2002 Mazda 6 setups, replacement often means swapping the whole assembly. Use quality parts, new gasket where applicable, and snug the bolts to spec. After refit, perform the relearn so the PCM knows the new closed and open positions — that’s what keeps fuel trims tidy and throttle response feeling right on Kiwi and Aussie roads.

Popular questions about 2002 Mazda 6 throttle position sensors

Where is the TPS on a 2002 Mazda 6?
It’s built into the throttle body on the intake manifold side. The system is drive‑by‑wire, so the pedal has its own sensor, and the throttle body houses the TPS that reports the actual plate angle back to the PCM.

Do you have to calibrate or relearn the TPS after replacement?
Yes. After replacing the throttle body/TPS, perform an electronic throttle/idle relearn with a scan tool. If that’s not available, a KAM reset followed by a warm idle period with all accessories off can help the PCM relearn baseline positions.

What symptoms point to a bad TPS on a Mazda 6 GG/GY?
Expect a wandering or high idle, hesitation off the line, gear hunting in autos, poor fuel economy, and a check engine light. Common DTCs include P0121–P0123 and P0221–P0223. Always confirm wiring integrity before condemning the sensor.