Parts for your 2019 Ford Focus-Throttle position sensors

2019 Ford Focus throttle-position-sensors (TPS)

On the 2019 Ford Focus (Mk4/C2 platform), a throttle position sensor is very much used. Ford’s workshop literature for the 2019 Focus (Electronic Throttle Control – section 303-14A) and common service data providers note the car runs drive‑by‑wire: the throttle body contains dual, integrated throttle position sensors, and the accelerator pedal carries a separate pedal position sensor. There’s no separate, standalone TPS to bolt on, it’s built into the electronic throttle body assembly.

The throttle position sensors tell the powertrain control module exactly where the throttle plate sits, so the engine can meter air, fuel and ignition timing with precision. On the Focus, the TPS works in tandem with the pedal sensor to deliver smooth torque, crisp shifts, stable idle, cruise control, and traction/stability functions. Two TPS tracks are used for redundancy, the module constantly cross-checks them for safety.

Because the TPS is part of the throttle body, servicing focuses on the assembly. It’s smart to keep the connector clean and secured, and during routine servicing, inspect the throttle bore for light deposits. If cleaning is needed, use a throttle‑body‑safe cleaner sparingly, don’t force the butterfly open by hand, and avoid flooding the electronics. Many technicians disconnect the battery and then perform an idle/throttle relearn to restore adaptives after cleaning.

Replacement is straightforward but should be methodical. The TPS isn’t individually serviceable, so replace the complete throttle body if the sensor tracks are out of range or correlation codes persist. Fit a new gasket/O‑ring, torque the fasteners evenly, and mind the wiring routing under the bonnet. After installation, carry out an ETC/throttle relearn or idle learn using a capable scan tool (Ford IDS/FDRS or equivalent) or the specified drive cycle so the PCM re‑calibrates throttle angles and idle airflow. Clearing KAM (keep‑alive memory) is often recommended.

Typical warning signs of TPS/throttle body drama on a 2019 Focus include a fluttery idle, sudden limp‑home, surging on light throttle, poor fuel economy, or a glowing MIL. Common DTCs include P0121/P0221 (TP sensor range/performance), P2135 (TP sensor correlation), and P2111/P2112 (throttle stuck open/closed). A scan of live data showing TP1/TP2 agreement, combined with smoke‑testing for air leaks, usually nails the diagnosis. These details align with Ford workshop manuals and widely used technical references (Autodata/Haynes Pro, Bosch Automotive Handbook) for late‑model Ford electronic throttle systems.

• Service tip: keep the air filter fresh and intake plumbing airtight, unmetered air can mimic TPS faults.
• Best practice: always perform a relearn after cleaning or replacing the throttle body.

Popular questions

Does the 2019 Ford Focus have a separate TPS I can replace?
No. The throttle position sensors are integrated into the electronic throttle body. If the sensor fails or the tracks don’t correlate, the fix is to replace the throttle body assembly and then carry out a throttle/idle relearn.

Is programming needed after throttle body/TPS replacement?
Yes, a relearn is required. Using a capable scan tool to reset adaptives and run an ETC learn is the cleanest method, though a specified drive cycle/idle learn can also be used. Skipping this step can leave the Focus with a rough idle or inconsistent tip-in.

What symptoms point to a failing TPS on a 2019 Focus?
Look for sudden limp mode, erratic idle, hesitation on light throttle, or a high idle. The MIL may be on with codes like P0121, P2135, P2111 or P2112. Live data that shows disagreement between TP1 and TP2 is a strong indicator the throttle body needs attention.