Parts for your 2007 Ford Focus-Throttle position sensors

2007 Ford Focus throttle-position sensor: what it does, where it is, and how to look after it

Technical documentation confirms the 2007 Ford Focus does use a throttle-position sensor (TPS). The Ford Workshop Manual and PC/ED diagnostic manuals for the 2007 Focus describe TPS circuits (often labelled TP1 and TP2 on electronic throttle bodies) and list related DTCs such as P0121, P0122, P0123, P0222, P0223 and P2135. Ford wiring diagrams for this model year show the TPS either as a standalone sensor on cable-throttle engines or integrated into the electronic throttle body (ETB) on drive‑by‑wire variants. These sources make it clear the TPS is relevant and fitted on 2007 Focus models.

On a 2007 Ford Focus, the throttle-position sensor tells the engine computer exactly how far the throttle plate is open. That live signal helps the PCM fine‑tune fuel delivery, ignition timing and idle control, and on auto models it can even influence shift behaviour. Many 2007 Focus variants in Australia and New Zealand run an electronic throttle body with two built‑in TPS tracks for redundancy. Others with a traditional cable throttle use a single bolt‑on TPS mounted to the throttle shaft. Either way, it’s a small part doing a big job every time the driver taps the pedal.

Typical signs the TPS or throttle body needs attention include a hesitant take‑off, surging at light throttle, a hunting idle, the wrench/check‑engine light, or the car dropping into limp mode. Common fault codes to see on a scan tool are P0121–P0123, P0222–P0223 and P2135 (correlation).

Servicing is straightforward. For cable‑throttle cars, the TPS is a separate three‑wire sensor held by two screws. Disconnect the battery, unplug the connector, mark the old sensor’s position, swap it like‑for‑like and avoid overtightening the screws. Clear the codes and allow the PCM to relearn idle. For electronic throttle body models, the TPS isn’t serviceable on its own, the whole throttle body is replaced as an assembly. Before replacing, a careful clean of the throttle bore and plate with throttle‑body safe cleaner can sort sticky behaviour. Keep solvents out of the motor and gears, and don’t force the plate by hand.

Good preventative care includes:

• Keeping the air filter fresh and the PCV system in good nick to limit oily deposits.
• Checking the TPS/ETB connector for moisture, pin tension and broken wiring.
• Verifying a smooth signal sweep (about 0.5 V closed to 4.5 V wide‑open) if testing with a scan tool or multimeter.

After throttle body replacement or a battery disconnect, perform a KAM reset/idle relearn using a scan tool, or follow the key‑on/idle and gentle drive cycle so the PCM relearns throttle and idle trims. Most owners find a quick test drive with varied light‑to‑moderate throttle seals the deal.

Popular questions about 2007 Ford Focus throttle-position sensors

Where is the TPS on a 2007 Focus?
On cable‑throttle versions, it’s a small black sensor bolted to the side of the throttle body where the shaft exits. On electronic throttle body models, it’s built into the throttle body along with the motor, mounted at the front of the engine bay on the intake manifold.

Can a bad TPS cause the wrench light and limp mode?
Yes. If the PCM sees mismatched or out‑of‑range TPS signals (especially on ETB cars with dual sensors), it can set codes like P2135 and command reduced power. Cleaning the throttle body sometimes helps, but a failing sensor typically needs the TPS (cable type) or the whole throttle body (ETB type) replaced.

Does the TPS need calibration after replacement?
Cable‑throttle TPS units generally don’t need manual calibration—just ensure correct alignment and let the PCM relearn idle. Electronic throttle bodies should have a KAM reset and throttle/idle relearn performed with a scan tool or via a prescribed key‑on/idle and gentle drive procedure so throttle control is smooth.