Parts for your 2019 Ford Transit-Temperature sensors

2019 Ford Transit temperature sensors

Temperature sensors absolutely are fitted to the 2019 Ford Transit. Ford’s Workshop Manual for the 2019 Transit notes multiple temperature inputs to the PCM/ECU (including Engine Coolant Temperature and Intake Air Temperature), Ford wiring diagrams show the ambient air temperature sensor for the HVAC and dash display, and the Motorcraft service parts catalogue lists replacement ECT sensors and related senders for this model range. OBD‑II diagnostics in the WSM also reference typical temperature‑sensor fault codes (for example P0115–P0119 for ECT), confirming their use on this vehicle.

On a 2019 Transit, temperature sensors help the van start cleanly on a cold morning, keep fuelling and ignition timing on point, run the cooling fans only when needed, and protect the engine and transmission under load. The dash temperature gauge and climate control rely on them too. Diesel variants (such as EcoBlue) also use exhaust gas temperature sensors to manage the DPF regen cycle and emissions.

• Engine Coolant Temperature (ECT): informs warm‑up, fuelling, fan strategy and overheat protection.
• Intake Air Temperature (IAT): adjusts fuelling and spark/boost for air density.
• Ambient Air Temperature: feeds HVAC and outside‑temp display.
• Transmission Fluid Temperature (TFT): manages shift strategy and thermal protection.
• (Diesel) Exhaust Gas Temperature (EGT): controls DPF regeneration and safeguards the turbo/exhaust.

They aren’t a regular “replace by X kilometres” item, but they do benefit from attention at service time. A good workshop will scan live data before and after a cold start to confirm readings track ambient and warm‑up normally, check connectors for corrosion, make sure wiring isn’t chafing under the bonnet, and look for coolant seepage around the ECT boss or thermostat housing.

Suspect a crook sensor if there are hard cold starts, rich running, high idle, fans roaring constantly, poor A/C behaviour, or the MIL on with codes like P0115–P0119, P0125 or P2183. When replacement’s needed, allow the engine to cool, safely relieve cooling‑system pressure, catch and reuse/replace coolant as specified, swap the sensor with a new O‑ring or seal, and torque to spec. Avoid thread sealant unless Ford calls for it. After refitting, bleed the cooling system, clear fault codes, and verify temps and fan operation with a scan tool. Using genuine or reputable OE‑quality parts is worth it, especially on diesels where temperature accuracy protects the DPF and turbo.

Note that sensor locations and part numbers vary by engine (petrol V6, EcoBoost, EcoBlue diesel), so VIN‑specific information from the workshop manual or parts catalogue keeps things tidy and avoids rework.

FAQs

Where is the engine coolant temperature sensor on a 2019 Ford Transit?
It’s typically mounted near the thermostat housing or in the cylinder head coolant passage. Exact placement varies with engine type, on EcoBlue diesels it’s often near the outlet housing, while V6 petrol engines place it close to the thermostat. A quick look at the workshop manual or a scan of the harness routing will pinpoint it.

Can a bad temperature sensor make the cooling fans run all the time?
Yes. If the PCM sees an implausible or missing ECT signal, it may default the fans to high to protect the engine. Other faults (like a stuck relay) can do the same, so confirm with a scan tool and basic electrical checks before replacing parts.

Do temperature sensors need routine replacement?
Not on a schedule. They’re replaced when testing shows a fault or when codes and symptoms line up. Including a quick live‑data check and a connector inspection at each service helps catch issues early without throwing parts at the problem.