Parts for your 2006 Ford Focus-Throttle position sensors

2006 Ford Focus throttle position sensor: purpose, servicing and FAQs

Based on the Ford Workshop Manual for the 2005–2007 Focus range and common aftermarket references such as the Haynes Ford Focus (2005–2009) manual and Autodata, the 2006 Ford Focus is fitted with a throttle position sensor (TPS). On cable‑operated throttle bodies used in many 1.6/1.8/2.0 Duratec petrol models, the TPS is a bolt‑on sensor at the throttle shaft. On variants with electronic throttle control (drive‑by‑wire), the TPS is integrated into the throttle body as dual tracks and is serviced as part of the throttle body assembly.

The TPS tells the engine control module exactly how far the throttle is opened, so fuelling and ignition timing can be dialled in cleanly from idle to full noise. In day‑to‑day driving that translates to smooth take‑offs, crisp throttle response, stable idle and sensible fuel economy. When the TPS signal goes off‑song, the Focus can show rough idle, flat spots, hunting revs, a flashing check‑engine lamp or the “limp home” warning on electronic‑throttle cars. Typical fault codes include P0121–P0123 and, on drive‑by‑wire variants, correlation codes such as P2135.

As part of regular servicing, the TPS isn’t a scheduled replacement item, but it’s smart to give the throttle body and connector a once‑over every 20,000–30,000 km. A light clean of the throttle bore and plate with throttle‑body‑safe cleaner helps the sensor read consistently. Avoid drowning the sensor itself—solvent intrusion can finish it off. Check the loom for hardening, green corrosion at the plug, or a lazy return spring on the throttle lever (cable setups).

Replacement advice depends on which Focus is in the driveway. If it’s a cable‑throttle model, the TPS usually unbolts with two Torx screws. Mark the old sensor’s position, fit the new one in the same orientation, and don’t force the shaft. After reconnecting the battery, perform an idle relearn (key on for 10 seconds, key off for 10 seconds, then start and let it idle for a few minutes with accessories off). For drive‑by‑wire variants, the TPS is integrated, if the sensor has failed, a complete throttle body is generally the correct fix. Always clear codes and verify live data shows a smooth throttle angle sweep from closed to wide open with no dead spots. A quick road test under varying loads confirms the Focus is back to its usual easygoing manners.

• Watch‑outs: erratic idle, surging, sudden loss of power, high fuel use.
• Good practice: keep electrical grounds clean, use dielectric grease on plugs, scan for codes before parts‑darting.

Does a 2006 Ford Focus have a separate TPS or is it drive‑by‑wire?

Both setups existed depending on engine and market. Many 1.6/1.8/2.0 Duratec petrol models use a cable‑operated throttle with a separate, replaceable TPS on the throttle body. Some variants use electronic throttle control where the TPS is built into the throttle body as part of a dual‑track position sensor.

What are common symptoms of a failing TPS on a 2006 Focus?

Drivers may notice hesitation, flat spots on acceleration, unstable idle, higher fuel consumption, or a check‑engine light. On drive‑by‑wire cars, a wrench/limp‑home warning and reduced power can occur. Scan tools often show P0121–P0123 or correlation faults.

Can the TPS be replaced without changing the throttle body?

Yes on cable‑throttle Focus models, the TPS is a stand‑alone part secured with two screws and a plug. On electronic‑throttle variants, the TPS is integral to the throttle body, so replacement generally means swapping the whole throttle body and performing an idle/ETC relearn.