Parts for your 2014 Toyota Hiace-Temperature sensors

2014 Toyota Hiace Temperature Sensors — What They Do and How to Look After Them

Temperature sensors absolutely are used on the 2014 Toyota Hiace. Toyota’s 200 Series Hiace repair information (KDH/TRH, 2014 model year) details multiple engine and HVAC-related temperature sensors: the Engine Coolant Temperature (ECT) sensor feeding the ECM’s THW signal, an Intake Air Temperature (IAT) sensor, and—on 1KD-FTV diesel models—a fuel temperature sensor. This aligns with common Denso-equipped Toyota systems of the era. So, for this Hiace, temperature sensors are integral to how it runs and keeps its cool.

In everyday terms, these sensors let the Hiace’s ECU know how hot the engine and incoming air are, so it can sort cold-start enrichment, idle speed, glow plug timing (diesel), radiator fan control, and air-con performance. If one goes out of whack, the van can end up hard to start, thirsty on fuel, a bit gutless, or stuck with the fan roaring under the bonnet.

There’s no fixed replacement interval in Toyota service schedules, they’re replaced on condition. Smart servicing includes quick checks and gentle cleaning where appropriate.

• Common signs of a crook temp sensor:
  • Hard cold starts, rough idle, or rich running
  • Cooling fans stuck on or not coming on
  • Erratic temp gauge, poor A/C performance
  • Check engine light with codes like P0115–P0119 (ECT) or P0110–P0113 (IAT), diesel may show fuel temp codes
• Simple servicing tips:
  • Scan-tool check: after an overnight cold soak, ECT and IAT should read close to ambient
  • Inspect connectors for green corrosion or loose pins, fix wiring before condemning the sensor
  • IAT sensors (often in or near the MAF) can be gently cleaned with MAF-safe cleaner—no scraping
• When replacing an ECT sensor:
  • On 1KD-FTV diesel it’s at the coolant outlet near the thermostat, on 2TR-FE petrol it’s near the water outlet
  • Cool engine, relieve pressure, drain a little coolant, swap sensor with new seal/O-ring, torque to spec, then bleed the cooling system
  • Refill with the correct Toyota coolant and check for leaks and fan operation

A well-sorted Hiace benefits from fresh coolant at the specified interval, tidy wiring, and periodic scan checks. That keeps temperature data accurate, fuel use tidy, and the van happy on long Kiwi or Aussie kilometres.

Popular questions about 2014 Toyota Hiace temperature sensors

Where is the engine coolant temperature (ECT) sensor on a 2014 Hiace?
On the 1KD-FTV diesel, it’s mounted at the coolant outlet on the cylinder head near the thermostat housing. On the 2TR-FE petrol, look around the thermostat/water outlet area. It threads into a coolant passage and connects to a two-pin plug.

Access varies a bit with body layout, but it’s generally reachable with basic hand tools once the engine is cool.

What fault codes point to a bad temperature sensor on this Hiace?
For the ECT, common codes are P0115, P0116, P0117, P0118, and P0119. Intake air temperature issues typically trigger P0110–P0113. On diesel models, a faulty fuel temperature sensor may raise P0180 series codes.

Always confirm with live data and wiring checks before replacing parts.

Do temperature sensors need routine replacement?
No routine interval—Toyota treats them as “inspect and replace if faulty.” During regular servicing, it’s sensible to compare cold start ECT/IAT readings to ambient, keep connectors clean and dry, and maintain the correct coolant. Replace the sensor only if it’s out of spec or causing drivability or DTC issues.