Parts for your 2018 Ford Mondeo-Throttle position sensors

2018 Ford Mondeo throttle-position sensor: what it does and how to look after it

Is a throttle-position sensor used on a 2018 Ford Mondeo? Yes — it’s absolutely relevant and fitted. Technical documentation confirms the Mondeo’s drive-by-wire electronic throttle body contains an integral, dual-track throttle-position sensor (TPS) that reports throttle plate angle to the PCM. See the Ford Workshop Manual (WSM) for 2015–2019 Mondeo/Fusion models, Fuel Charging and Controls (Electronic Throttle Control) — the TPS is non-serviceable and part of the throttle body assembly. Ford’s Motorcraft service information and parts catalogues list the throttle body as a complete unit with an internal TPS, and the accelerator pedal has its own separate pedal position sensor. Diesel TDCi variants also use a throttle/anti-shudder valve with a built-in position sensor, noted in WSM sections covering intake throttle operation.

On the 2018 Mondeo, the TPS is the PCM’s key feedback for how far the throttle plate is actually opened, so it can manage air flow, fuel delivery, spark and emissions. Because it’s integrated, owners won’t find a stand-alone TPS to swap out. If the sensor fails, the fix is to replace the throttle body assembly.

What owners should know about servicing and replacement:

• Symptoms: erratic idle, sudden limp-home, delayed throttle response, poor fuel economy, or the MIL on. Common codes include P0121, P0122, P0123, P0222, P0223 and P2135.
• Inspection: under the bonnet, check the throttle body connector and loom for corrosion or chafing, especially near the intake. Don’t force the throttle plate by hand.
• Cleaning: if there’s sticking or carbon build-up, a throttle-body-safe cleaner can help. Light deposits can mimic a failing TPS by upsetting the plate’s rest position.
• Replacement: when faults persist, replace the entire throttle body. Use quality parts that match the Mondeo’s engine (e.g., 1.5L/2.0L EcoBoost or 2.0 TDCi), fit a new gasket if applicable, and torque fasteners to spec.
• Relearn: after refitting, perform an electronic throttle/idle learn with a capable scan tool, or follow the Ford drive-cycle relearn routine. Clearing keep-alive memory helps the PCM relearn adaptives.

As part of routine servicing, a quick visual of the throttle body and connectors, and a scan for stored throttle-related DTCs, is smart insurance. For most cars in Aussie and Kiwi conditions, a clean and relearn every 40–60,000 km (or when drivability niggles appear) keeps throttle response crisp and avoids unexpected limp-home dramas.

Popular questions

Does the 2018 Mondeo have a separate TPS I can replace on its own?
No. Ford integrates the TPS into the electronic throttle body. If the sensor fails, the entire throttle body is replaced. The accelerator pedal has a separate position sensor, but that’s a different part and fault path.

Do I need programming after fitting a new throttle body?
Usually a throttle/idle relearn is required. A scan tool reset is best, followed by a short drive cycle so the PCM can relearn the throttle plate positions. Simply disconnecting the battery may not complete the learn properly.

What are early signs my TPS/throttle body is playing up?
Intermittent hesitation, a hunting idle, cruise control dropping out, or the car suddenly going into limp mode. If the MIL is on, scan for P0121–P2135 range/correlation codes before replacing parts.