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alexander_braun65

Peugeot 4008 Overheating

My 2016 Peugeot 4008, gasoline engine, is overheating like mad. The check engine light's on too. Mileage is 274633 km. I suspect the radiator fan – could a dodgy speed sensor be the culprit?

Summary of the thread

A 2016 Peugeot 4008 with a gasoline engine is experiencing severe overheating and a check engine light is on. The initial suspicion is a faulty radiator fan, possibly due to a defective speed sensor. However, the primary issue is identified as a non-functional fan motor. Replacing the fan motor and sensor resolves the overheating problem.

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4 comment(s)

janarichter5

Overheating and a check engine light certainly point to cooling issues. A defective speed sensor could affect the fan's operation, but it's a bit indirect. Have you checked the fan motor itself, and are the fan blades obstructed?

alexander_braun65 (community.author)

Good point! Motor seems dead as a doornail. Blades are clear. But still wondering, could that sensor throw everything off even if the motor is gone?

janarichter5

If the fan motor is confirmed non-functional, the speed sensor is likely a secondary issue, or a consequence. It's best to address the primary fault first. Given your expertise, I would recommend a workshop visit.

alexander_braun65 (community.author)

Cheers! Turns out it was the motor, just as you suspected. New fan motor and sensor replacement later, I'm 250€ lighter, but she's running cool. Thanks for the sanity check!

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PEUGEOT

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4008