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Parts for your 2006 Ford Fiesta-Temperature sensors
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2006 Ford Fiesta temperature sensors — what they do and how to look after them
Temperature sensors absolutely are used on the 2006 Ford Fiesta. Ford’s Workshop Manual (TIS) for the Fiesta Mk6 (Section 303—Engine and Section 303-14—Electronic Engine Controls), plus Autodata and the Haynes Fiesta manual for this generation, all detail an engine temperature sensor (either Engine Coolant Temperature, ECT, or Cylinder Head Temperature, CHT depending on engine) and an Intake Air Temperature (IAT) sensor. Many trims also feature an ambient air temperature sensor for the outside-temp display and HVAC logic. So yes—temperature sensors are a key part of how a 2006 Fiesta starts, runs and protects itself.
On this model, the ECT/CHT sensor tells the ECU how hot the engine is, shaping fuelling, ignition timing, cold-start enrichment and radiator fan operation. It also feeds the temp gauge and can trigger limp-home if things get too toasty. The IAT sensor (often integrated with the MAF or MAP, depending on engine) helps the ECU correct for air density so mixtures stay spot-on from a frosty Dunedin morning to a scorching Perth arvo. If fitted, the ambient sensor informs the dash display and helps climate control behave sensibly.
When these sensors drift or fail, the Fiesta can run rich, idle roughly, crank longer when cold, switch the fan on at odd times, or throw OBD-II codes like P0115–P0119 (ECT/CHT) or P0110–P0113 (IAT). Fuel economy and performance will usually cop it too.
- Servicing tips: During routine services, a quick scan of live data (ECT/CHT vs dash gauge, IAT vs ambient) is a ripper health check. Look for plausible readings and smooth warm-up. Inspect connectors for green crusties or brittle tabs, and make sure loom routing isn’t chafing on brackets.
- Replacement advice: Use quality sensors (genuine or reputable OEM). For ECT/CHT swaps, work on a cool engine, depressurise the cooling system, and catch/replace any lost coolant with the correct spec mix. Lightly lubricate O-rings
