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Discussion Starter · #1 ·
Hi,everyone

A VOLVO S40 with mileage of about 122,000 km, engine and transmission models were B4204S, MPS6. The car water temperature suddenly down during driving. Connect VOLVO VIDA to read the relevant fault codes, just only one: "ECM-0118 engine coolant temperature sensor, signal is too high, B420S3 0". How can i do the next? Anyone can give me some advices?

Best regards, Thanks
 

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Sounds like it could be a faulty sensor.

Moving your thread to the S40 section, this subforum is more about club discussions.
 

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Are these fail high? Look to make sure the connector is plugged in for the temp sensor. I don't recall ever seeing a failure.
 
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