linaklein1
Peugeot 508 Water Sensor Fault
Summary of the thread
A 2022 Peugeot 508 diesel owner reported a check engine light and rough engine performance, with an error indicating a water sensor malfunction. The suspected cause was a defective cable or plug connection. After further investigation, it was confirmed that the issue was due to a faulty cable to the sensor, which was repaired at a workshop.
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4 comment(s)
linaklein1 (community.author)
The sensor itself appears dry. I have not checked the fuel filter. Is there any chance the water sensor is the root cause and not the fuel filter?
emiliaschulze36
Well, anything's possible, but a dry sensor throwing codes AND rough running? That's screaming electrical fault. Probably corroded connector or damaged wire. You're likely right. Get the multimeter out, or bite the bullet and head to a workshop. They'll diagnose it properly.
linaklein1 (community.author)
Thank you for your input. The workshop confirmed the cable to the sensor was faulty. Repair cost 95€.
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PEUGEOT
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508
emiliaschulze36
Water sensor, eh? Rough running too? Sounds like a proper gremlin! Is the sensor actually wet, or just throwing a code? Might be chasing shadows if it's dry. You sure it's not fuel filter?