Ford Freestyle exhaust temperature sensor issue

I've got a 2005 Ford Freestyle with a gasoline engine. The check engine light is on, power is down, and fuel consumption is up. It's done 249061 kilometers. I checked for obvious stuff, but no luck. Could this be the exhaust temperature sensor? I read a leak can cause this.

4 comment(s)

Hey, I had a similar issue with my Freestyle. Those symptoms point towards a faulty exhaust temperature sensor. A leak messes with the temperature readings the ECU gets, impacting fuel-air mixture and timing. Have you noticed any temperature fluctuation?

Thanks! What kind of temperature fluctuations should I look for? And does the exhaust temperature sensor need immediate attention, or can it wait?

Erratic readings are what I mean. The ECU uses that sensor to optimize engine performance and emissions. If the sensor is sending bad data, the car's computer won't be able to properly manage the engine, and that could lead to further issues. Best get it checked at a workshop, could be the sensor itself or an exhaust leak. They can run diagnostics to pinpoint the problem.

Understood. I took it to the workshop, and they confirmed the exhaust temperature sensor was faulty due to a small exhaust leak. The repair cost 265€. Everything is working now.

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