Parts for your 2006 Honda Fit-Throttle position sensors

2006 Honda Fit (Jazz) Throttle Position Sensor — what it is, why it’s there, and how to look after it

Yes — the 2006 Honda Fit (known as Jazz in Australia and New Zealand) uses a throttle position sensor (TPS). On this model the TPS is built into the electronic throttle body as part of Honda’s PGM‑FI electronic throttle control. Technical references that confirm this include the Honda Fit/Jazz Service Manual for the GD series (Electronic Throttle Control System section), which describes dual throttle position sensing inside the throttle body reporting throttle plate angle to the PCM/ECM, and the Honda electronic parts catalogue (EPC) for 2006 GD1/GD3, which shows the throttle body assembly with integrated TP sensors. Many variants don’t service the TPS as a separate part, the throttle body is replaced as an assembly and an idle/throttle learn is performed.

On a 2006 Fit, the TPS tells the engine computer exactly how far the throttle plate is open so it can dial in the right amount of fuel, ignition timing, and idle control. It works alongside the accelerator pedal position sensors (at the pedal) to give smooth drive‑by‑wire response. When the TPS signal is spot‑on, the car feels crisp off the line, cruises cleanly, and idles neatly with the air con and electrics on.

Typical signs the TPS circuit isn’t happy include a hesitant take‑off, erratic idle, sudden flat spots, “limp” behaviour, or the MIL on with codes like P0121–P0123 or P2135. Because the sensor is integral on most GD throttle bodies, diagnosis matters before throwing parts at it.

• Maintenance tips: keep the throttle body clean and the connector dry and tight, use quality fuel, fix any vacuum leaks, and don’t spray harsh cleaners straight into sensors.
• Diagnostic tips: use a scan tool to watch TP% and APP% move smoothly together, check for correlation codes, inspect earths and the 5V reference.
• Replacement notes: where the TPS isn’t serviceable separately, replace the throttle body assembly with a quality unit, fit a new gasket, and torque evenly. After refit or a battery disconnect, perform Honda’s idle/throttle learn (warm engine, all loads off, let it idle for about 5 minutes, if the fan cycles, wait until it stops, then continue timing) or use a capable scan tool to run the ETCS/TPS relearn routine.

Owners who keep on top of throttle body cleanliness and electrical health usually enjoy tens of thousands of carefree kilometres. If faults persist after cleaning and relearn, it’s worth having a technician confirm the issue with live data before committing to a throttle body replacement.

Popular questions about 2006 Honda Fit throttle position sensors

Does the 2006 Honda Fit actually have a TPS?
It does. The GD‑series Fit/Jazz uses an electronic throttle body with built‑in (redundant) throttle position sensing. Honda’s service literature for the Electronic Throttle Control System spells out the dual‑track TP feedback to the PCM/ECM.

Can the TPS be replaced on its own, or is it part of the throttle body?
On many 2006 Fit/Jazz throttle bodies, Honda supplies the TPS integrated with the motor and gears, so the fix is a complete throttle body. Some aftermarket options list a separate sensor, but Honda procedure typically calls for replacing the assembly and carrying out an idle/throttle learn.

What are the common symptoms of a failing TPS on a 2006 Fit?
Hesitation, uneven idle, poor fuel economy, and the MIL on with TP/ETCS codes are common. If APP% and TP% don’t track together on a scan tool, or codes like P0122/P2135 appear, the TP circuit, wiring, or throttle body may be at fault.