Parts for your 2007 Ford Fiesta-Throttle position sensors

2007 Ford Fiesta throttle position sensor: what it does and when to replace it

Based on Ford’s workshop information and mainstream service data, a throttle position sensor (TPS) is fitted to 2007 Ford Fiesta petrol models, while the diesel TDCi doesn’t use a conventional TPS. Ford’s PC/ED (Powertrain Control/Emissions Diagnosis) for Fiesta 2002–2008 lists diagnostic trouble codes for Throttle/Pedal Position circuits (P0120–P0124), and Haynes Ford Fiesta (2002–2008) manual No. 4182 outlines TPS location on the throttle body for petrol engines. Autodata diagrams for the 2007 Fiesta WQ 1.6 Duratec also show a throttle body with position sensing. Diesel variants manage air with an EGR/throttle shutter for emissions and shutdown, so there’s no driver-operated TPS in the classic sense.

On the 2007 Fiesta petrol, the TPS tells the engine computer exactly how far the throttle is open. That live angle signal helps the ECU juggle fuel delivery, ignition timing, idle speed and, on autos, shift behaviour. Whether the car has a traditional cable throttle or an electronic throttle body, there’ll be position sensing either as a separate sensor on the housing or integrated into the throttle body assembly.

Typical signs the TPS is playing up include a hesitant tip-in, flat spots, hunting idle, poor fuel economy, or the check engine light with codes like P0121–P0123. Before throwing parts at it, it’s worth checking the basics: clean the throttle bore (without drowning the sensor in solvent), ensure the connector is snug and free of green crust, and inspect the loom for strain where it sweeps under the bonnet. A quick scan-tool look at throttle angle should show a smooth sweep from roughly 0–100%, any dropouts or spikes are a giveaway.

Replacement advice depends on the engine code. On some Fiestas, the TPS is a separate bolt-on unit, on others, it’s integrated and the whole throttle body is replaced. Don’t try to “adjust” it—modern Fiesta TPS units are non-adjustable, and the ECU handles alignment. After replacement or a thorough clean, perform a throttle/idle relearn: let it idle to warm, hold idle a couple of minutes with and without A/C, then take a gentle drive with varied throttle. If drivability’s still off, run a proper diagnostic routine rather than guessing.

• Service tip: keep the throttle body clean at regular intervals and protect connectors with a light application of dielectric grease.
• Petrol models: TPS fitted, Diesel TDCi: no conventional TPS (uses different air control strategies).

Technical references: Ford TIS Workshop Manual (Fiesta 2002–2008, PC/ED: Throttle/Pedal Position DTCs), Haynes Ford Fiesta 2002–2008 (No. 4182), Autodata Technical Data for 2007 Fiesta WQ 1.6 Duratec, Bosch Automotive Handbook (throttle position sensing principles).

Popular questions about 2007 Ford Fiesta throttle position sensors

Does my 2007 Fiesta actually have a TPS?
Petrol models do—position sensing is on or inside the throttle body. Diesel TDCi models don’t use a driver-operated TPS, they rely on other sensors plus an EGR/throttle shutter for emissions and shutdown. A quick look at the throttle body under the bonnet (or a scan-tool readout for throttle angle) will confirm what’s fitted.

Can the TPS be tested or cleaned at home?
If it’s a separate sensor, you can check the sweep with a multimeter or, better yet, watch throttle angle on a scan tool for a smooth climb. Cleaning targets the throttle bore, not the sensor itself—use throttle-body cleaner sparingly and avoid flooding electronics. On integrated units, rely on scan data rather than probing pins.

Do I need a relearn after replacing the TPS or throttle body?
Yes. After fitting, warm the engine, allow it to idle a couple of minutes with all loads off, then with A/C on, and finish with a short, gentle drive using light-to-moderate throttle. Some scan tools offer an “idle learn” or “ETC reset” that speeds things up, but the drive cycle method works well in most cases.