Parts for your 2019 Ford Fiesta-Map sensor

2019 Ford Fiesta MAP sensor — what it does, why it matters, and how to look after it

Based on Ford workshop information (ETIS/Workshop Manual engine management sections), Ford Motorcraft service literature and parts catalogues, plus mainstream repair data (Autodata and Haynes), the 2019 Ford Fiesta is equipped with a MAP sensor. On 1.6L Ti‑VCT models it’s a manifold absolute pressure sensor mounted to the intake manifold, and on 1.0L EcoBoost models it’s typically a T‑MAP (temperature + pressure) sensor on the manifold, with a separate charge‑air/boost pressure sensor in the intercooler plumbing. So yes—MAP sensing is relevant and fitted to 2019 Fiesta engines.

The MAP sensor measures the absolute pressure inside the intake manifold. The Fiesta’s powertrain control module uses that pressure (along with intake temperature, throttle position and engine speed) to figure out engine load. That’s how it trims fuel, sets ignition timing and, on turbo EcoBoost variants, manages boost. A healthy MAP signal means crisp throttle response, good fuel economy and smooth idle, a crook one can make the car feel doughy or thirsty and kick on the check engine light with codes like P0106–P0108, or boost correlation faults on turbo models.

This isn’t a scheduled replacement item, but it’s worth a look during regular servicing—especially on EcoBoost engines where oil mist and soot can settle in the manifold. A light inspection every 20,000–30,000 km pairs nicely with air filter changes.

• Typical symptoms of a dodgy MAP: rough idle, hesitation, higher fuel use, hard starts, and a glowing MIL.
• Quick checks with a scan tool: at key‑on engine‑off, MAP should read close to local barometric pressure, at warm idle it should show a steady vacuum (lower kPa on non‑turbo), at wide‑open throttle it should climb towards barometric (and higher under boost on EcoBoost).

If replacement is needed, it’s a simple DIY for most. Under the bonnet, locate the sensor on the intake manifold, unplug the connector, remove the retaining screw, and ease the sensor out. Fit a new O‑ring, seat the new sensor squarely, refit the screw (tighten to the manufacturer spec), reconnect, then clear codes and perform an idle relearn if required. If the sensor port is just a bit gummed up, a careful clean with electronics‑safe cleaner can help—avoid harsh solvents and don’t poke the sensing element.

Tech tip: before throwing parts at it, rule out vacuum leaks, split charge hoses (EcoBoost), or wiring faults, the Fiesta’s DTCs for MAP/boost correlation can point to plumbing issues just as often as the sensor itself.

Does the 2019 Ford Fiesta definitely have a MAP sensor?

Yes. Ford’s workshop manual and Motorcraft parts listings show a manifold absolute pressure (MAP or T‑MAP) sensor on 2019 Fiesta engines. The 1.6L Ti‑VCT uses a manifold‑mounted MAP, the 1.0L EcoBoost uses a T‑MAP on the manifold and a separate charge‑air pressure sensor in the boost tract.

What are the signs the MAP sensor is failing on a 2019 Fiesta?

Common clues include rough idle, sluggish acceleration, increased fuel use, and a check engine light. Scan tools often reveal codes like P0106–P0108 or boost correlation faults on EcoBoost models. Live data that doesn’t make sense—like no change in kPa with throttle—also points at trouble.

Can the MAP sensor be cleaned, or should it be replaced?

If the sensor port is contaminated with oil mist or soot, a gentle clean with electronics‑safe cleaner can restore readings. If there’s internal failure, cracked housing, or persistent DTCs after cleaning and wiring checks, replacement is the go. Always fit a fresh O‑ring and verify readings with a scan tool afterward.