Parts for your 2002 Honda Fit-Throttle position sensors

2002 Honda Fit throttle position sensor: what it does and how to look after it

Based on factory documentation, a throttle position sensor is absolutely relevant on the 2002 Honda Fit (also sold as the Jazz in AU/NZ). The Honda Fit/Jazz 2002–2008 Factory Service Manual (PGM‑FI, Electronic Throttle Control System section) specifies an electronic throttle body with dual throttle position sensors built into the unit, and an accelerator pedal position sensor at the pedal. Independent references such as the Haynes Honda Jazz (02–08) manual also note the drive‑by‑wire throttle body with integrated TPS. So yes—this model uses throttle position sensing, it’s just part of the throttle body assembly rather than a separate, bolt‑on sensor.

On a 2002 Fit, the throttle position sensors tell the ECU exactly how far the electronic throttle plate is open. Working alongside the accelerator pedal position sensor, they let the engine management sort fuelling, ignition timing and idle control without a traditional cable or idle valve. That’s why the car feels smooth off the mark and doesn’t hunt at idle when everything’s right.

Because the TPS is integrated, servicing is more about inspection and calibration than tinkering with a standalone part. If the car shows symptoms like lazy acceleration, surging, an erratic idle, or drops into limp‑home mode, and you see DTCs such as P0121, P0122, P0123 or P2135, it’s time to test the throttle body assembly and wiring. A proper scan tool can compare the two TPS tracks and the pedal sensor to confirm what’s out of whack.

Replacement is straightforward but precise. Most workshops will replace the complete throttle body if a TPS track is faulty, as the sensors aren’t designed to be serviced separately. After fitting, an idle/throttle learn needs to be done—preferably with a Honda‑capable scan tool—so the ECU knows the new plate positions. Don’t force the throttle plate by hand, it’s driven by a motor and can be damaged.

• Keep the throttle bore clean with sensor‑safe cleaner to prevent sticky plate movement.
• Check loom routing and connectors for corrosion or strain, especially near the throttle body and pedal.
• If the battery’s been disconnected, perform the idle learn so it doesn’t idle rough.

Look after these basics and the 2002 Honda Fit’s electronic throttle and its TPS pair will keep the little hatch feeling crisp and predictable around town and on the open road.

FAQs

Does a 2002 Honda Fit actually have a throttle position sensor?

Yes. The 2002 Fit/Jazz uses an electronic throttle body that contains two throttle position sensors for redundancy. These work with the accelerator pedal position sensor to manage throttle opening under the ECU’s control.

Can the TPS be replaced separately on a 2002 Fit?

Generally, no. The TPS is integrated into the electronic throttle body. If testing shows a TPS fault, workshops typically replace the entire throttle body assembly and then carry out a throttle/idle learn with a scan tool.

What are the common signs the TPS/throttle body needs attention?

Hesitation, flat spots, surging, erratic idle, poor fuel economy, or limp‑mode, often with codes like P0121–P0123 or P2135. Before replacement, a clean of the throttle bore and a wiring/connector check is worthwhile, followed by proper calibration.